The statement that is true of the punctuated equilibrium hypothesis but not true of gradualism is "lineages experience long periods of stasis".
What is the punctuated equilibrium hypothesis?The punctuated equilibrium hypothesis proposes that there are long periods of stasis in lineages, followed by short periods of rapid evolution. Gradualism, on the other hand, proposes that species evolve slowly and gradually over time without any significant periods of rapid change.
The punctuated equilibrium hypothesis is considered controversial because it implies that there is not much evolutionary change over long periods of time. This is contrary to the traditional view of evolution, which is based on the idea of gradualism.
The punctuated equilibrium hypothesis supports the hypothesis that most evolutionary change results from small changes. It also explains the gaps in the fossil record, which are not explained by the gradualism hypothesis.
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The transportation of substances in and out of a cell is regulated by the cell membrane.
Describe two factors that increase the rate of diffusion of a molecule across the cell membrane.
Answer:
membrane surface area and the concentration gradient
Explanation:
the larger the surface area of the membrane that a substance is diffusing through , the faster the rate of diffusion . Likewise , the bigger the difference in the concentration between 2 areas , the greater the concentration gradient and the faster the rate of diffusion.
Bacteria grow best in foods that are highly acidic true or false
Answer:
I think this is false. Bacteria grow best in an environment that is neutral or slightly acidic.
The course adjustment knob on a microscope should never be used with which of the
following?
Select one:
a. medium-power lens
b. low-power lens
C. eyepiece
d. high-power lens
All of the following are questions that a biological anthropologist might address EXCEPT... How genetically similar are various human populations? What influenced human evolution? How are we related to primates? How have languages diversified over time?
The question that a biological anthropologist might NOT address is: How have languages diversified over time?
Which question is outside the scope of biological anthropology?Biological anthropology is a field of study that examines human biological variation, evolution, and the interaction between biology and culture. It encompasses a wide range of research topics related to human populations, genetics, evolution, and the relationship between humans and other primates.
While questions about genetic similarity among human populations, the influences on human evolution, and the relationship between humans and primates are all within the realm of biological anthropology, the diversification of languages over time falls more into the domain of linguistics and cultural anthropology. Language evolution and diversification involve complex social, cultural, and historical factors that extend beyond the biological aspects typically studied in biological anthropology.
Biological anthropologists focus on investigating genetic, anatomical, and behavioral aspects of humans and our primate relatives to understand our evolutionary history and the biological underpinnings of human variation. They examine genetic markers, fossil evidence, skeletal remains, and comparative anatomy to unravel our evolutionary past and explore the forces that shaped human populations and species over time.
While language and its evolution are undoubtedly important in the broader study of human culture and society, the specific investigation of language diversification is more commonly addressed by linguists, sociolinguists, and cultural anthropologists who study the social and cultural aspects of human communication and language development.
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For molecules in aqueous (i.e. water) solutions, high temperatures typically disrupt hydrogen bonds but not covalent bonds. Based on this information, what happens to DNA when heated? O DNA is degraded to individual nucleotides O Nitrogenous bases are released from each strand of DNA O The DNA strand will become anti-parallel O The two strands of DNA will separate but remain intact O The sugar-phosphate backbone will be degraded Question 46 2.5 pts The uniform width of a DNA molecule is due to O Phosphodiester bonds creating a uniform helical structure O Base pairing between purines O Base pairing between pyrimidines Hydrogen bonding between nitrogenous bases and ribose O Base pairing between pyrimidines and purines Question 47 2.5 pts Which of the following statements best describes DNA replication in prokaryotic (bacteria) and eukaryotic cells? O DNA replication in prokaryotes begins at each end of a linear chromosome O Both prokaryotic and eukaryotic chromosomes have multiple origins of replication O Similar to prokaryotes, eukaryotes replicate their chromosomes one at a time O Prokaryotic chromosomes have a single origin of replication, whereas each eukaryotic chromosome has many O Prokaryotic chromosomes are replicated in two directions until the origin of replication is reached, whereas replication forks on eukaryotic chromosomes proceed until the chromosome ends are reached
The correct options for each question are:
The two strands of DNA will separate but remain intact.the base pairing between pyrimidines and purines. Prokaryotic chromosomes have a single origin of replication, whereas each eukaryotic chromosome has many.DNA structure and replicationWhen DNA is heated, the two strands of DNA will separate but remain intact. This is because high temperatures typically disrupt hydrogen bonds but not covalent bonds. DNA is a double-stranded molecule held together by hydrogen bonds between complementary base pairs. When heated, the energy disrupts the hydrogen bonds between the two strands, causing them to separate. However, the covalent bonds within each strand (i.e. the sugar-phosphate backbone and the bonds between the individual nucleotides) remain intact, allowing the separated strands to come back together when the temperature is lowered.
The uniform width of a DNA molecule is due to the base pairing between pyrimidines and purines. Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C). These base pairs are complementary to each other, and they are held together by hydrogen bonds. The distance between the two nitrogenous bases in a base pair is always the same, which is why DNA molecules have a uniform width.
The statement that best describes DNA replication in prokaryotic and eukaryotic cells is: Prokaryotic chromosomes have a single origin of replication, whereas each eukaryotic chromosome has many.
In prokaryotic cells, DNA replication begins at a single origin of replication. The replication fork then proceeds in both directions, until the entire chromosome has been replicated. In eukaryotic cells, there are multiple origins of replication, and the replication forks proceed in both directions from each origin. This means that eukaryotic chromosomes are replicated much more quickly than prokaryotic chromosomes.
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The Hardy-Weinberg equation is useful for predicting the percent of a human population that may be heterozygous carriers of recessive alleles for certain genetic diseases. Phenylketonuria (PKU) is a human metabolic disorder that results in intellectual disabilities if it is untreated in infancy. Approximately 1 in 10,000 newborns has PKU. If the U.S. population is in Hardy-Weinberg equilibrium, approximately what percent of the population are heterozygous carriers of the recessive PKU allele?
The Hardy-Weinberg equation states that in a non-evolving population, the frequencies of alleles and genotypes will remain constant from generation to generation.
The equation is given by p2 + 2pq + q2 = 1, where p is the frequency of the dominant allele, q is the frequency of the recessive allele, p2 is the frequency of the homozygous dominant genotype, 2pq is the frequency of the heterozygous genotype, and q2 is the frequency of the homozygous recessive genotype
The Hardy-Weinberg equation can be used to predict the percentage of a population that are carriers of a recessive allele. If p represents the frequency of the dominant allele and q represents the frequency of the recessive allele, then the frequency of the heterozygous genotype (2pq) will be the proportion of the population that are carriers of the recessive allele.
The frequency of the recessive allele can be calculated from the proportion of affected individuals in the population. In the case of phenylketonuria (PKU), which affects 1 in 10,000 newborns in the United States, the frequency of the recessive allele can be calculated as follows:q2 = 1/10,000 = 0.0001q = sqrt(0.0001) = 0.01
The frequency of the dominant allele can be calculated as 1 - q, or 0.99.Using the Hardy-Weinberg equation:p2 + 2pq + q2 = 1(0.99)2 + 2(0.99)(0.01) + (0.01)2 = 0.9801 + 0.0198 + 0.0001 = 1Therefore, the proportion of the U.S. population that are carriers of the PKU allele is 2pq = 2(0.99)(0.01) = 0.198, or approximately 2%.
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Identify the true statements below.
The reaction of an exploding firework occurs at a faster rate than a burning candle.
The activation energy required for an exploding firework is less than the activation energy required for a burning candle.
Answer:
In the explanation-----
Explanation:
The first statement is correct since the gun explosive powder explodes since they light a fuse at first, and once the fuse reaches the end it explodes as a reaction. However, for a candle it relies on the lit fire. Wax is a tough and a longer substance to melt compared to a exploding firework.
For the activation energy for the firework, it uses that energy in a result of the fuse reaching the end and reacting with the gun powder.
Answer:
A is the correct answer
Explanation:
I took the test
At what water depth will a wave with a wavelength of 30' touch bottom and begin to low down
Water depth will a wave with a wavelength of 30' touches the bottom and begins to lower down:20 meters.
When waves approach the shore they will “touch bottom” at a depth equal to half of their wavelength; in other words, when the water depth equals the depth of the wave base.
In physics, the wavelength is the spatial length of a periodic wave—the space over which the wave's form repeats. The wavelength is the distance between two wave crests, and it'll be the same for troughs. The frequency is the variety of vibrations that pass over a given spot in one 2nd and its miles are measured in cycles consistent with 2d (Hz) (Hertz).
Wavelength is the distance among equal points (adjoining crests) inside the adjacent cycles of a waveform sign propagated in space or along a wire. In wireless systems, this length is typically laid out in meters (m), centimeters (cm) or millimeters (mm).
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Using simple language, explain how your demonstration shows the effect of distance forces. Use the term electric charge, electric field, and electric force
The demonstration shows how the distance between electric charges affects the strength of the electric force between them. This is due to the fact that the electric force depends on both the magnitude of the charges and the distance between them.
Electric charges are the fundamental property of matter, and they can either be positive or negative. Like charges repel each other, while opposite charges attract each other. Electric fields are the regions in which these charges exert a force on each other. The electric field is created by a charged object and is the force experienced by a charge placed in that field. The electric force is the force that charged objects exert on each other. This force depends on the magnitude of the charges and the distance between them. The closer the charges are, the stronger the electric force is between them. As the distance between charges increases, the electric force between them decreases. In my demonstration, I showed two objects with different electric charges. The objects were initially close to each other, and they exerted a strong electric force on each other. As I moved one of the objects away, the electric force between them decreased because the distance between them increased. This decrease in force shows the effect of distance on electric forces.
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19. Demographic transition refers to a shift from
A. high birthrates and death rates to low birthrates and death rates.
B. immigration to emigration.
C. population decrease to population increase.
D. logistic growth to exponential growth.
A NOTEBOOK
Answer:
A. high birthrates and death rates to low birthrates and death rates.
what analysis tool does not include PCR?
A: STR profiling
B: SNP analysis
C: Y-STR analysis
D: electrophoresis
Electrophoresis tool is used for PCR result analysis. thus option D is correct.
what is electrophoresis?
Electrophoresis has the ability to pass charged molecules in an electric field, it is the separation of proteins which is usually accomplished using polyacrylamide gel electrophoresis (PAGE).
In this process where the proteins are driven by an applied current through a gel based matrix.
these polyacrylamide gel is formed as a thin slab between two glass plates or as a cylinder within a glass tube.
The primary objective of electrophoresis is to separate DNA molecules based on their size which may be completed on a gene of interest prior to electrophoresis.
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Answer:
SNP analysis
Explanation:
Correct on my exam
one example of prokaryote is a
Answer:
all single-celled organisms
Explanation:
Answer:
Prokaryotes are all single-celled organisms, most of which you know of as bacteria. For example, the famous (or infamous) Escherichia coli bacterium is a prokaryote, as is the streptococcus bacterium responsible for strep throat.
Explanation:
moss invades and establishes itself on bare rock, accumulating the beginnings of soil. after several years, enough soil has become established that grasses begin to grow where there was once bare rock. without the moss building up soil, the grasses would have had no chance. the mosses changed the environment enough to permit grasses to grow in a process called:____.
In this following question, The process described in the scenario is called "primary succession."
What is primary succession?When there is no antecedent soil present, such as on bare rock, sand dunes, or freshly created volcanic islands, primary succession is the natural process that takes place. Pioneer species that occupy the bare surface during this phase include lichens and mosses, which start to physically and chemically erode the rock. A layer of soil capable of supporting more complex plants like grasses, shrubs, and trees starts to grow as the pioneer species perish and disintegrate.
In the scenario given, mosses are the pioneer species that start the primary succession process by settling on the bare rock, building up soil, and setting the circumstances necessary for grasses to eventually develop.
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Communities with cold winters often spread salt on roadways. Salt lowers the melting point of water, which means slippery snow and ice will melt instead of building up on roads. While this does prevent car accidents, it poses certain problems. What is the most serious problem that could occur to local ecosystems due to road salt?.
Problems in ecosystem due to road salt are flooding, damage to plant life, water pollution and accidents.
What is ecosystem?An ecosystem is a region where a bubble of life is created by plants, animals, and other species working together with the weather and topography. Ecosystems are made up of both biotic, or living, and abiotic, or non-living, components.
The cause of the problem is floods caused by excessive ice and snow melting, damage to local plants caused content of salt in the soil, animals that lick salt are prone to accidents, significant increases in soil erosion rates influence the water quality of streams and rivers.
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Which is not an element of weather that is measured and analyzed to make accurate forecasts? a: relative humidity/dew point b: time c: cloud cover/visibility d: wind direction
Answer:
b: time
Explanation:
When meteorologists need to make a forecast they analyze different measurements in order to accurately make a forecast, these include patterns of winds, pressure, pressure change, temperature, humidity, clouds, and hygrometers. From the answers provided the one measurement that is not used is time. Mainly due to the fact that weather does not depend on the time of day, and any type of weather can be present at any time if the right circumstances exist.
Answer:
Wind direction
Explanation:
Weather forecast is simply known to be a way of telling the people of how the weather condition of a particular place will be at a particular time. This usually shows whether the day or time will be rainy or sunny.
In this case, what is not normally considered in whether forecast is wind direction. While other factors are always ingredients of weather forecasting.
How does a central receiver system collect the sun's heat energy?
O A. by using a large dish studded with mirrors to reflect sunlight onto a receiver mounted at the center of the dish
by using long curved mirrors to reflect sunlight onto a receiver installed along the length of each mirror
О в.
OC.
by using an array of solar panels to reflect sunlight onto a receiver made from a semiconductor material
OD. by using rows of mirrors called heliostats to reflect sunlight onto a receiver mounted at the top of a tower
A central receiver system collect the sun's heat energy by usuing rows of mirrors called heliostats to reflect sunlight onto a receiver mounted at the top of a tower.
Briefing:What is heliostat?A heliostat is an instrument that continuously tilts a mirror or a no. of mirror surfaces to follow the path of the sun and reflect sunlight toward a predefined destination, such as a receiver perched atop a solar tower. The technologies used in concentrating solar power (CSP) and solar thermal power towers require heliostats.
What is a central reciever system?Central reciever systems are considered to have an expansive potential for mid-term fetched lessening of power compared to parabolic trough innovation, since they can accomplish higher temperatures, coming about in more productive steam cycles or eventually higher exergy cycles utilizing gas turbines at temperatures over 1000°C.
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Which two planets have that most closely resemble this comparison?
Explanation:
Kepler-452b
Kepler-452b (a planet sometimes quoted to be an Earth 2.0 or Earth's Cousin based on its characteristics; also known by its Kepler Object of Interest designation KOI-7016.01) is an exoplanet orbiting the Sun-like star Kepler-452 about 1,402 light-years (430 pc) from Earth in the constellation Cygnus
During labor, certain hormones are released that cause the contraction of the uterus in order to push the baby out. When those hormones are sensed by the glands of the endocrine system, they secrete more of that hormone which keeps labor going until the baby is born.
Answer:
The endocrine system assists in maintaining and regulating different functions of the body by producing and discharging hormones. It comprises glands situated throughout the body, which produce chemicals known as hormones directly into the blood. The levels of hormones in the blood are monitored by a highly unique homeostatic mechanism known as feedback.
The two kinds of feedback are common, that is, negative and positive feedback, of this positive feedback, is the rare mechanism. It augments the changes done rather than opposing them. For example, the discharging of oxytocin from the posterior pituitary gland at the time of labor is an illustration of a positive feedback mechanism.
The stimulation of the muscle contractions, which pushes the baby via the birth canal is done by oxytocin. This discharging of oxytocin leads to an augmented or stronger contraction at the time of labor. This contraction is enhanced and intensify until the baby comes out of the birth canal. However, when the stimulus to the pressure receptor terminates, the generation of oxytocin ceases, which eventually results in the stopping of labor contractions.
Answer:
positive
Explanation:
e2020
Marisa is going to conduct an experiment to test a new anti-depressant medication. Some subjects will be taking the actual medication while others will take a placebo. Marisa is going to make this a single-blind experiment. What is one advantage of using a single-blind experiment in this study?
Answer:
One of the main advantages of using a single blind study in this case is that she will have uneffected people to compare to the ones who took the medicine
Explanation:
Using a single-blind experiment in testing the new anti-depressant medication offers the advantage of minimizing potential bias in the participants' responses, which could arise from their knowledge of whether they are receiving the actual medication or a placebo.
In a single-blind experiment, participants are unaware of whether they are receiving the medication or the placebo. This reduces the likelihood of placebo effect and experimenter bias. Participants' psychological and behavioral responses are more likely to be genuine and unbiased since they lack knowledge of their group assignment.
This strengthens the study's internal validity by improving the accuracy of evaluating the true effects of the anti-depressant medication without the influence of participant expectations or experimenter interference.
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What is the initial stage of all stars?
A) nebula
B) black hole
C) supernova
D)white dwarf
Answer:
A) nebula
Explanation:
A protostar is the earliest stage of a star's life. A star is born when the gas and dust from a nebula become so hot that nuclear fusion starts. Once a star has “turned on” it is known as a main sequence star.
Answer:
nebula
Explanation:
stars start in a nebula
Do you think exposure to Earth’s Magnetic field could cause people to have paranormal sensations?
Answer:
Yes I do think it would cause paranormal activity.
Explanation:
Because of the atmosphere and the layers of the atmosphere we are protected from the powerful rays of the Magnetic field. So if we were exposed to the Magnetic field we would act weird or paranormal.
In which type of synovial joint does one bone with a convex non-hemispherical surface fit into the concave depression of another
Double stranded, nucleic acid made from nucleotides subunits containing a TG and C, the stores genetic information in cells
?
The probability that their child will have brown eyes 50%. Thus, option A is the correct option.
What is heterozygous?According to the given information, the woman is heterozygous for blue eyes. It means that the blue eye color is a dominant trait over brown eyes since heterozygous carrier genotypes are present for dominant alleles only.
The allele for blue eye color is "B" and the one for brown eye color is "b". Therefore, the genotype of heterozygous woman would be "Bb" and the genotype of the homozygous recessive male would be "bb".
Therefore, A cross between Bb x bb gives following phenotype ratio = 50% brown eye : 50% blue eye. There is 50% probability of their child to have blue eye color.
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what is the difference between the nematocysts of a hydra and those of a sea anemone
Nematocysts are stinging cells that can be found in the phylum Cnidaria. These specialized cells can capture prey and deter predators. The hydra and sea anemone are two cnidarian species that possess nematocysts. While the nematocysts of hydra and sea anemone share similarities, they have some key differences.Nematocysts of a hydraHydra is a freshwater cnidarian that has a tube-like body and is a simple polyp.
Hydra has three types of nematocysts: spirocysts, microbasic mastigophores, and atrichous isorhizas. Each of these nematocysts have specific functions. For example, spirocysts help in wrapping the prey while microbasic mastigophores help in penetrating the prey's skin.Nematocysts of a sea anemoneSea anemones are marine cnidarians that have a sessile polyp body. They have a different type of nematocyst, acrorhagi. Acrorhagi are elongated nematocysts present on the oral disc and tentacles of sea anemones.
These nematocysts contain toxic threads that can be used as a weapon to attack other cnidarians. In addition to acrorhagi, sea anemones also possess spirocysts, microbasic mastigophores, and atrichous isorhizas, like hydra.To summarize, the nematocysts of hydra and those of sea anemone have a similar structure, but sea anemones also possess elongated nematocysts called acrorhagi that can be used as a weapon.
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During glycolysis, glucose is broken down into two molecules of pyruvate.
A diagram shows the conversion of a glucose molecule to 2 pyruvic acid molecules. In this process, 2 A T P form 2 A D P, 2 N A D produce 2 N A D H, and 4 A D P produce 4 A T P.
What is the main transformation that occurs during glycolysis?
Answer:
Glycolysis produces ATP, pyruvate, and NADH by oxidizing glucose.
Answer:
Glycolysis produces ATP, pyruvate, and NADH by oxidizing glucose.
Explanation:
The process of making proteins from information in DNA is called
A. Gene expression
B. mRNA
C. tRNA
A hiker in the woods reading her compass to determine which direction to go
a. What is one force acting in this scenario?
b. Is this force a contact or non-contact force?
c. What is a second force acting in this scenario?
d. Is this force a contact or non-contact force?
a. The force acting in this scenario is the Earth's magnetic field, which is responsible for the functioning of the compass.
What is Earth's magnetic field?Earth's magnetic field is a natural phenomenon that surrounds and protects the planet. It is generated by the motion of molten iron in the Earth's core, creating a magnetic dipole that extends into space. The field helps to deflect harmful solar wind and cosmic radiation from the Earth's atmosphere.
b. The Earth's magnetic field is a non-contact force because it does not require direct physical contact between the compass and the Earth's magnetic field.
c. Gravity is a second force acting in this scenario. It is the force that keeps the hiker and the compass grounded on the surface of the Earth.
d. Gravity is a contact force because it requires physical contact between the objects to exert its influence.
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TRUE or FALSE?
All of the carbon in existence is cantinually recycled in the carbon cycle.
False
True
Answer:
The correct answer is true.
Answer: B. True
Reason:
Hope this helps
50POINTS!!!!!!!!!!!!!!!!!!!!!!!1
Describe how energy and matter move through the environment under both aerobic
and anaerobic conditions. Must be at least two paragraphs
Answer:
Energy drives the cycling of matter within and between systems. Energy drives the cycling of matter within and between systems in aerobic and anaerobic conditions. Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes.
Explanation:
Which of the following does NOT effect the rate of enzyme reaction?
A) pH
B) Substrate Concentration
C) Temperature
D) Amount of product
From the options that factor that does not effect the rate of enzyme reaction is : ( D ) Amount of product.
Enzymes are substances found in organisms that catalyzes the rate of chemical reaction occurring in an organism. during the chemical reaction the enzyme remains intact and is not utilized during the process.
Some of the process that may Inhibit the performance of an enzyme(s) includes ;
pH , The substrate concentration,Temperature andThe concentration of the enzyme.The amount of the product does not affect the performance rate of the enzyme because enzymes functions in chemical reactions and not physical reactions
Hence we can conclude that the factor that does not effect the rate of enzyme reaction is the Amount of product
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