charles darwin proposed that the mechanism of evolution is natural selection and that it explains how adaptations arise. what are adaptations? give two examples of adaptations.
Answers
Adaptations are inherited characteristics of organisms that enhance their survival and reproduction in specific environments. Possible examples include the mottled coloration of a fawn and the sharp talons.
An organism, such as a plant or animal, can acquire any heritable characteristic that aids in its ability to survive and procreate in its environment. Three related definitions of Adaptation exist. First, the dynamic evolutionary process of natural selection improves the evolutionary fitness of organisms by adaptation them to their environments. Second, it's a state that the populace reaches during that process.
Any organic, living system that performs as a separate, autonomous unit is considered an organism. Cells make up every living thing. Taxonomy divides living things into categories like multicellular animals, plants, and fungus, or unicellular microbes like protists, bacteria, and archaea.
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Related Questions
What is the physiological cause of a heart attack?.
Answers
Answer:
stress
Explanation:
when stress levels are high, your whole body is affected including your heart. when stress levels become so high that you're affected, your heart suffers and causes a heart attack.
Alfred Wegener brought together several lines of empirical evidence to support his theory of continental drift. Wegener proposed that all the landforms on Earth once formed a supercontinent called Pangaea, and they have drifted through tectonic plate movement to their present locations today.
Explain how the following observations likely led Wegener to infer that the landforms on Earth once formed a supercontinent called Pangaea in his theory of continental drift.
- The coastlines of South America and Africa look like puzzle pieces that fit together.
- Fossils of tropical plants have been found in Antarctica.
- Rocks of identical age, type, and sequence have been found in North America and Eurasia.
Answers
The evidence provided for the theory of Continental drift is as follows:
- The coastlines of South America and Africa look like puzzle pieces that fit together- Fossils of tropical plants have been found in Antarctica- Rocks of identical age, type, and sequence have been found in North America and Eurasia-What is the theory of Continental drift?The theory of Continental drift was proposed by Alfred Wegener in the year 1912. The theory of continental drift is the theory that once the whole earth was just one supercontinent Known as Pangaea which later broke up long ago and drifted apart to produce the various continents as we have them today.
The evidence provided for the theory of Continental drift is as follows:
- The coastlines of South America and Africa look like puzzle pieces that fit together - since these can fit together, it must be that they broke apart from each other from the Pangaea.- Fossils of tropical plants have been found in Antarctica - this proves that the whole earth was one supercontinent which these plants grew all over on, but the breaking apart of the Pangaea resulted in the separation of the continents.- Rocks of identical age, type, and sequence have been found in North America and Eurasia- this proves that the rock forms were all together on one planet.In conclusion, the theory of continental drift was that the continents of today were once a supercontinent which broke apart and drifted apart.
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What system is included in the kinetic chain
Answers
Answer:
The upper kinetic chain consists of the fingers, wrists, forearms, elbows, upper arms, shoulders, shoulder blades, and spinal column.
Explanation:
Proteins A, B, and C are membrane proteins associated (either as peripheral or integral proteins) with the intact biological membranes of a culture of cells. After the cells containing these proteins are exposed to a severe increase in ionic strength, only protein A remains associated with the cells. One can conclude that:
Answers
Based on the given information, one can conclude that protein A is an integral membrane protein, while proteins B and C are peripheral membrane proteins.
When cells are exposed to a severe increase in ionic strength, it disrupts the ionic interactions that hold peripheral membrane proteins to the membrane. As a result, peripheral proteins become detached and are no longer associated with the membrane. In this scenario, proteins B and C dissociated from the membrane due to the increased ionic strength.
On the other hand, integral membrane proteins are embedded within the lipid bilayer of the membrane, often spanning across it. They are held in place by hydrophobic interactions with the lipid tails of the membrane, and their association is not dependent on ionic interactions. Therefore, protein A remained associated with the cells despite the increase in ionic strength.
Hence, the conclusion is that protein A is an integral membrane protein, while proteins B and C are peripheral membrane proteins.
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¿Cuál de los siguientes materiales es
una mezcla?
Answers
Answer:
Un material que podría considerarse una mezcla es el carbono. Esto se debe a que el carbono es una mezcla de diferentes materiales. Otros ejemplos son el oxígeno y un trozo de pan.
What type of nerve cells or axons that are covered by myelin sheath? What type doesn’t? And which organ?
And why?
Answers
Answer:
Cells that aren't included in the reflex arc
Explanation:
mostly in the brain
cells require myelin sheaths because they need their transmission to go faster and need to react quickly to avoid danger/harm
can someone help plzzzzzzzzzzzzzzzzzz
Answers
Answer:
your answer is
Bright Color
What is the first 20 element
Answers
Answer:
1. H - Hydrogen
2. He - Helium
3. Li - Lithium
4. Be - Beryllium
5. B - Boron
6. C - Carbon
7. N - Nitrogen
8. O - Oxygen
9. F - Fluorine
10. Ne - Neon
11. Na - Sodium
12. Mg - Magnesium
13. Al - Aluminum
14. Si - Silicon
15. P - Phosphorus
16. S - Sulfur
17. Cl - Chlorine
18. Ar - Argon
19. K - Potassium
20. Ca - Calcium
Lesson 02. 01 Properties of Water
Identify that water is a compound common to living things
Recognize the importance of hydrogen bonding to the properties of water
Explain why many compounds dissolve in water
Lesson 02. 02 Microscopes
Explain how modern technology affects the study of biology
Compare the structure and function of various types of microscopes
Lesson 02. 03 Early Cells
Describe the developments that led to the cell theory
Differentiate between eukaryotic and prokaryotic cells
Describe the structure of the cell membrane
Distinguish between active and passive transport
Lesson 02. 03A Early Cells (Honors)
Describe the theory of the origin of eukaryotic cells (endosymbiosis)
Explain the evidence that supports the theory of endosymbiosis
Lesson 02. 04 Cell Structure and Function
Describe the internal structures of eukaryotic cells
Summarize the functions of the organelles found in plant and animal cells
Lesson 02. 05 Cellular Energy
Recognize the importance of ATP as an energy-carrying molecule
Identify energy sources used by organisms
Lesson 02. 06 Cellular Respiration
Describe the process of cellular respiration
Compare aerobic respiration to anaerobic respiration
Lesson 02. 07 Photosynthesis
Describe the process of photosynthesis
Compare cellular respiration to photosynthesis
Answers
Answer:
Lesson 02.01: Properties of Water
Water is a compound common to living things because it is essential for life. It is a major component of cells and plays a crucial role in many biological processes.
Hydrogen bonding is important to the properties of water. Water molecules are polar, meaning they have a slight positive charge on one end and a slight negative charge on the other. This polarity allows water molecules to form hydrogen bonds with each other. Hydrogen bonding gives water its high boiling point, high specific heat capacity, cohesion, and adhesion properties.
Many compounds dissolve in water due to its polarity. Water's polar nature allows it to form interactions with other polar molecules, such as salts and sugars, as well as with charged ions. The positive and negative ends of water molecules surround and separate the ions or polar molecules, effectively dissolving them in the water.
Lesson 02.02: Microscopes
Modern technology has greatly impacted the study of biology. Advanced microscopes, such as electron microscopes, have allowed scientists to observe structures at a much higher resolution and magnification than was previously possible. Techniques like fluorescence microscopy and confocal microscopy enable the visualization of specific molecules and cellular processes in living organisms.
There are various types of microscopes with different structures and functions:
Light microscopes: Use visible light to illuminate the specimen and produce an image. They are commonly used in educational and research settings and can magnify up to 1000x.
Electron microscopes: Use a beam of electrons instead of light to visualize specimens. They offer much higher magnification and resolution than light microscopes. There are two types: transmission electron microscopes (TEM) and scanning electron microscopes (SEM).
Scanning probe microscopes: Use a physical probe to scan the surface of a specimen. They can provide atomic-level resolution and are used in nanotechnology and materials science.
Lesson 02.03: Early Cells
The developments that led to the cell theory include:
Robert Hooke's discovery of cells in cork in 1665.
Anton van Leeuwenhoek's observations of microscopic organisms in pond water in the late 17th century.
Matthias Schleiden's and Theodor Schwann's formulation of the cell theory in the 19th century, stating that all living organisms are composed of cells, and cells are the basic units of life.
Eukaryotic cells have a nucleus and membrane-bound organelles, while prokaryotic cells lack a nucleus and membrane-bound organelles. Eukaryotic cells are generally larger and more complex than prokaryotic cells.
The cell membrane, also known as the plasma membrane, is a selectively permeable barrier that surrounds the cell. It consists of a phospholipid bilayer with embedded proteins. The cell membrane regulates the movement of substances in and out of the cell and plays a vital role in maintaining cell homeostasis.
Active transport requires energy to move substances against their concentration gradient, from an area of lower concentration to an area of higher concentration. Passive transport, on the other hand, does not require energy and involves the movement of substances along their concentration gradient, from an area of higher concentration to an area of lower concentration.
Lesson 02.03A: Early Cells (Honors)
The theory of the origin of eukaryotic cells is called endosymbiosis. It proposes that eukaryotic cells evolved from the symbiotic relationship between different types of prokaryotic cells.
The evidence supporting the theory of endosymbiosis includes:
Mitochondria and chloroplasts have their own DNA and ribosomes, similar to prok
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identify the stage of cellular respiration in which each of following takes place
Answers
a. Electrons are passed to oxygen molecules and water is produced: Aerobic respiration - Krebs Cycle and Electron Transport Chain
b. Glucose is broken down to form pyruvate molecules: Glycolysis
c. ATP is formed by chemiosmosis: Electron Transport Chain
d. Acetyl CoA reacts with oxaloacetate to form citric acid: Krebs Cycle
in which phase of hemostasis is fibrin deposited, creating a solid blood clot?
Answers
The phase of hemostasis is fibrin deposited, creating a solid blood clot is the final stage of hemostasis,
It occurs in the coagulation phase of hemostasis, which is the second phase. During this phase, procoagulants are activated and converted to thrombin, which then converts fibrinogen into fibrin. Fibrin is a fibrous protein that creates a mesh-like network of fibers that trap platelets and red blood cells, forming a solid blood clot. This clot seals the wound and prevents further blood loss.
The process of fibrin deposition is essential for hemostasis, but it can also cause problems if clots form inappropriately, leading to thrombosis or embolism. Disorders of hemostasis can cause bleeding or clotting disorders. Overall, the deposition of fibrin during hemostasis plays a crucial role in maintaining the body's hemostatic balance and preventing bleeding.
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Each of the following nerves is found in the lumbar plexus, except the ________ nerve.
a) obturator
b) sciatic
c) saphenous
d) genitofemoral
e) femoral
Answers
Each of the following nerves is found in the lumbar plexus, except the sciatic nerve.
The lumbar plexus is a network of nerves located in the lower back, formed by the anterior branches of the lumbar spinal nerves.
The nerves included in the lumbar plexus are the obturator nerve, saphenous nerve, genitofemoral nerve, and femoral nerve.
The sciatic nerve, however, is part of the sacral plexus and not the lumbar plexus.
Summary: The lumbar plexus includes the obturator, saphenous, genitofemoral, and femoral nerves, but not the sciatic nerve.
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changes to the sequence of nucleotides in dna, or changes to chromosomes, are called mutations . in an example called a point mutation , only one base pair is altered. if a base pair is inserted or deleted, the change may cause a
Answers
The changes to the sequence of nucleotides in DNA, or changes to chromosomes, are called mutations.
DNA is a dynamic and adaptable molecule. As a result, the nucleotide sequences present inside are subject to change owing to a process called as mutation. A specific mutation's impact on the genetic make-up of an organism can be advantageous, damaging, or even innocuous.
The insertion or deletion of one or more nucleotides during replication might result in a mutation type called a frameshift mutation. The result of a frameshift mutation is a complete alteration of a protein's amino acid sequence.
A point mutation is a sort of genetic alteration in which the DNA or RNA sequence of an organism only experiences one nucleotide base change, addition, or deletion.
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Mention the types of bees
Answers
Answer:
ok thus very good percent few Mohammad khan
One approach to studying the Earth is
considering the complete system, rather
than individual parts. This approach is
known as a(n) _
approach.
A. individualistic
B. holistic
C. simplistic
Answers
One approach to studying the Earth is considering the complete system, rather than individual parts is known as holistic approach and is therefore denoted as option B.
What is Holistic approach?This type of approach involves the study of a system as a whole and not according to the individual parts which it comprises of. This type of approach touches all the parts of the earth as a complete system.
This system is the most ideal due to its thoroughness in the analysis of the different parts which makes it more accurate. This is therefore the reason why holistic was chosen as the most appropriate choice.
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hello, what is your favorite type of music
Answers
Answer:
EDM
Explanation:
I like the beats.
What is the function of an enzyme?
A.enzymes slow
down chemical
reactions
B.enzymes break
themselves into
small pieces
C.enzymes combine
products to form
reactants
D.enzymes speed up
chemical reactions
Answers
Answer: The correct answer is D.)
Explanation:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
What is the longest a tornado has stayed on the ground?
Answers
Answer:
3 1/2 hrs
Explanation:
yassssssssssssss
Which statement accurately compares the roles of radiation and conduction
in transferring heat on Earth?
A. Radiation transfers heat from the sun to the land surface, while
conduction transfers heat from the land surface to the
atmosphere.
B. Radiation transfers heat from the land surface to the atmosphere,
while conduction transfers heat within the atmosphere.
C. Conduction transfers heat from the sun to the land surface, while
radiation transfers heat from the land surface to the atmosphere.
D. Conduction transfers heat within the atmosphere, while radiation
transfers heat from the sun to the land surface.
Answers
Answer:d
Explanation:
o
why did the scientific use a two-dimensional model instead of of another type of model.
Answers
Answer:
Sometimes, a diagram or image isn't enough. We need to test some things out in three dimensions. There are two main types of three-dimensional models, or models that have length, depth, and breadth, structural models and model organisms.
Explanation:
hope this helps
a chroloplast is releasing large amounts of oxygen. what does this tell you about what other processes are going on inside the chroloplast
Answers
Answer:
photosynthesis.
Explanation:
chloroplast, is an organellein the plant that is the site of photosynthesis, the process by which light energy is converted to chemical energy, resulting in the production of oxygen and energy-rich organic compounds.
I think that's right
most fungi are decomposers; they recycle the nutrients from nonliving organic matter. other fungi are specialized to live in symbiotic relationships with other organisms. some fungi live as parasites and others as mutualists. most plants, in fact, could not survive and grow without their fungal partner.
Answers
Fungi can form symbiotic relationships with other organisms, acting as parasites or mutualists, and many plants rely on their fungal partners for survival and growth.
The majority of fungi are decomposers, which means they break down dead organic material, such as fallen leaves, wood, or dead organisms, and release the nutrients back into the ecosystem. This crucial role of fungi in decomposition helps to recycle nutrients and maintain the balance of ecosystems.
However, fungi also engage in various symbiotic relationships. Some fungi live as parasites, deriving nutrients from living organisms while causing harm or disease. Examples include fungal infections in plants, animals, and humans. On the other hand, many fungi form mutualistic associations with other organisms, where both partners benefit from the relationship. One prominent example is mycorrhizal fungi, which form mutualistic associations with the roots of most plants.
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Which action is NOT a way to test a hypothesis? a. Analyze results b. Design an experiment c. Make a model d. Gather and evaluate evidence
Answers
Answer:
Make a model
Explanation:
A hypothesis is a plausible explanation of a given phenomenon of the natural world. This explanation (hypothesis) must be tested by using the scientific method.
The action 'analyze results' is NOT a way to test a hypothesis (Option a).A hypothesis can be tested (either confirmed or rejected) by experimental and/or observational procedures.The data collected by these experiments and/or observations can be then used as empirical evidence to support (or reject) the working hypothesis.In conclusion, the action 'analyze results' is NOT a way to test a hypothesis (Option a).
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If
some energy depletion produces a positive change, does it follow
that more energy depletion is always better? why or why not
Answers
No, more energy depletion is not always better because there is a threshold beyond which excessive depletion can lead to negative consequences such as environmental degradation and imbalance in ecosystems.
No, it does not follow that more energy depletion is always better, even if some instances of energy depletion can produce positive changes.
Threshold Effect: Energy depletion can have positive effects up to a certain point. For example, extracting a limited amount of fossil fuels can provide energy for human needs. However, once the threshold is crossed, further depletion can lead to negative consequences such as environmental pollution, climate change, and resource depletion.Ecological Impact: Energy depletion often involves the extraction and utilization of natural resources, which can have detrimental effects on ecosystems. Increased depletion can disrupt ecological balance, harm biodiversity, and lead to the degradation of habitats and ecosystems.Sustainable Alternatives: Relying solely on energy depletion is not sustainable in the long run. It is important to shift towards renewable and clean energy sources that have minimal environmental impact, such as solar, wind, and geothermal energy. This reduces the need for further energy depletion and promotes a more sustainable energy future.Environmental Considerations: Energy depletion is often associated with negative environmental externalities, including air and water pollution, deforestation, and habitat destruction. These environmental impacts can have far-reaching consequences for human health and well-being.Therefore, while some instances of energy depletion may bring short-term benefits, it is crucial to consider the long-term sustainability and potential negative impacts. Striving for a balance between meeting energy needs and preserving environmental integrity is essential for the well-being of both current and future generations.
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Methyl mercury is a toxic chemical that is formed when mercury is combined with water.
Methyl mercury accumulates in the tissues of organisms, and the concentration increases at
each trophic level. Which population of organisms would be most harmed by an increase in
mercury content?
A
B
Iake-bottom plants
photosynthetic microorganisms
carnivorous fish
С
D
herbivorous crustaceans
Answers
please help I don't understand!
Answers
dton
7. Amino acids can undergo dehydration
synthesis reactions to form larger molecules
called -
of
A polysaccharides.
triglycerides.
© nucleotides.
polypeptides.
Answers
Answer:
polypeptides
Explanation:
Amino acids generally represent the building blocks of proteins. In order words, proteins are polymers of amino acids.
The amino acids in proteins are linked together by peptide bonds. A peptide bond is formed between two amino acids when the amine group of one of the amino acids combines with the carboxylic group of the other with the elimination of water. When the reaction involves multiple amino acids, multiple peptide or polypeptide, also known as protein is formed.
Answer:
polypeptides
Explanation:
you extract a dna sample from a crime scene. the genotype is 100/80 at the d16s539 locus and 70/93 at th01. a) you have a suspect in custody. assuming this suspect is innocent and of european ancestry, what is the probability that their genotype would match this profile by chance (a falsematch probability)? b) the fbi uses 13 markers. wh
Answers
A)The overall false match probability is the product of the two false match probabilities, or 0.08 * 0.00651 = 0.000504.
The false match probability of a single locus is calculated by multiplying the frequency of one allele by the frequency of the other allele. For the first locus, D16S539, the frequencies of the two alleles are 0.100 and 0.80, respectively.
The false match probability is 0.100 * 0.80 = 0.08. For the second locus, TH01, the frequencies of the two alleles are 0.070 and 0.093, respectively.
The false match probability is 0.070 * 0.093 = 0.00651. The overall false match probability is the product of the two false match probabilities, or 0.08 * 0.00651 = 0.000504.
B) The false match probability of 13 loci is calculated by multiplying the false match probabilities of each locus. In this case, the false match probability is 0.000504^13, or 4.18x10^-17.
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Complete question is attached below.
HELP NEEDED ASAP!!!!!
Answers
Answer:
blank #1= cretaceous period of the mesozoic era
blank #2= cambrian period of the paleozoic era
blank #3= We are currently living the Quaternary Period or the Cenozoic era. There was no mass extinction event that ended the Tertiary Period and started the Quaternary Period / Cenozoic era. Instead, the division between the two periods is somewhat ambiguous and often argued by scientists.
I tried my best but I can't figure out the chart part, sorry :/
what molecule or molecules other than the mrna, if any, are present at the e site or would have just left the e site? give the type and number of any other molecules
Answers
Molecules other than the mrna present at the e site are trna molecules have just left the e site.
small rna molecule transfer rna, often known as trna, is essential for the production of proteins. The messenger RNA (mRNA) molecule and the expanding chain of amino acids that make up a protein are connected by transfer RNA, which is also known as an adapter. every time an amino acid is added to the chain, a particular trna mates with the corresponding sequence on the mrna molecule to make sure the correct amino acid is added to the protein being created. every time an amino acid is added to the chain, a particular trna mates with the corresponding sequence on the mrna molecule to make sure the correct amino acid is added to the protein being created.
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