Which organisms are most likely responsible for causing mass die-off of anaerobic organisms during the pre-Cambrian
Answers
During the pre-Cambrian period, mass die-offs of anaerobic organisms were likely caused by cyanobacteria or blue-green algae. Cyanobacteria have been known to produce toxic compounds that can harm other organisms, and their ability to photosynthesize and produce oxygen may have disrupted the anaerobic environment in which other organisms thrived.
Additionally, their ability to fix nitrogen may have created an imbalance in nutrient availability, leading to die-offs of other species. There is also evidence that a series of glaciations during the pre-Cambrian may have caused die-offs of anaerobic organisms due to the disruption of ocean circulation and the resulting decrease in nutrient availability.
Some researchers suggest that the evolution of oxygenic photosynthesis in cyanobacteria was a key factor in the rise of multicellular life during the Cambrian period, as oxygen levels in the atmosphere increased and provided a new source of energy for complex organisms.
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Related Questions
Mosquitoes can carry and transmit many diseases to humans. In the past, the insecticide DDT was heavily used to reduce mosquito populations in order to reduce instances of disease transmission. However, after some time, mosquito populations developed a resistance to DDT, which made the DDT less effective in reducing mosquito populations.
Based on what you’ve learned about natural selection, in 3–5 sentences, describe how mosquitoes may have come to develop this resistance.
Answers
Answer:
After mosquitoes in a population are exposed to doses of insecticides that are too weak to kill them, mosquitoes may develop resistance to the active ingredient(s). This makes the use of surveillance-based targeted mosquito control of the utmost importance.Explanation:
describe how genetic information is carried in chloroplasts and mitochondria
Answers
Genetic information is carried in chloroplasts and mitochondria in the following way:
Chloroplasts have their own ribosomes, the structures where proteins are made from genetic information; and their own DNA.The set of genes of an organism (or organelle) contained and organized in chromosomes is called the genome.The genome of chloroplasts is known as plastome, the genes found in plastomes code for proteins of the photosynthetic machinery; transcription, translation and replication of their own DNA and regulation of proteins with the nucleus.These genes are usually grouped in small niches whose organization has been maintained throughout evolution.Plant mitochondria, like chloroplasts, have a circular genome that generally obeys the number of molecules present in a mitochondrion, as well as the size depends on the species.MtDNA is a circular double helix molecule, each mitochondria contains between tens and hundreds of molecules of this DNA.The mtDNA has more non-coding sequences, with more genes and with different organization (exons and introns) in them.The mitochondrial translation system is unique to them and ribosomal and transfer RNAs are encoded by mtDNA, and the genetic code used for translation is different from the universal one.Therefore, we can conclude that chloroplasts and mitochondria are autonomous cellular organelles, both possess DNA that is capable of replicating, transcribing and translating independently of the nuclear one.
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What is the difference between a unicellular organism and multicellular organism?
Select one:
a. Unicellular organisms are made up of a single cell, while multicellular organisms are made up of several cells.
b. Unicellular organisms are not living, while multicellular organisms are living.
c. Unicellular organisms are highly organized into tissues and organs, while multicellular organisms are simple.
d. Unicellular organisms do not need water, while multicellular organisms do need water.
Answers
Answer:
A.
Explanation:
From the name, "unicellular" you can deduce that "uni" means one, and vice versa for multicellular "multi".
Over a long period of time, the
average temperature and
precipitation
of an area is called
A. regional pressure
B. climate
C. temperate
Answers
Answer:
B climate
Explanation:
Climate means over a long period of time like years, months, decades, and centuries, but tempurature is only for a few hours, minutes or days.
Answer: Justice.
Explanation: The Answers Justice.
Gene on a chromosome lies close to another gene controlling a different trait. This indicates that jeans are blank the first gene contributes to the expression of the second gene. This indicates blank
Answers
Answer: genes are linked
Explanation: Gene on a chromosome lies close to another gene controlling a different trait. This indicates that genes are linked, meaning they are physically close to each other on the same chromosome. The proximity of these genes suggests that they are more likely to be inherited together as a unit, rather than independently assorting during the process of genetic recombination.
Two students are talking about what they learned in class. One says, "sex is biological, not socially constructed." Support or oppose the argument that sex is biological and not socially constructed. Use at least two course materials (articles, videos, podcasts, etc) to make your point.
Answers
Sex is a biological trait that refers to the observable physical and genetic characteristics that distinguish males from females. It is frequently assumed that sex is based on biological or genetic characteristics rather than social and cultural aspects.
The physical variations between males and females, such as genitalia and breasts, are some examples of sex differences. Thus, it is a biological characteristic rather than a social one. Both social constructionism and biological determinism, on the other hand, have opposing perspectives on gender. Biological determinism emphasizes that gender differences are inborn, while social constructionism emphasizes that they are socially produced. According to the social constructionism perspective, gender identity and the roles associated with it are the product of socialization and cultural expectations, whereas biological determinism focuses on innate biological differences and the impact of biology on gender.
The claim that sex is a biological trait and not socially constructed can be supported by two course materials. The article "Sex as Biological and Gender as a Social Construct" by Anne Fausto-Sterling argues that sex is a biological characteristic because it is based on genitalia and chromosomes, while gender is socially constructed. This article suggests that sex is primarily concerned with physical characteristics, while gender is linked to social and cultural expectations, which is consistent with the idea that sex is biological and gender is social.
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Which of the following is NOT part of the vestibular apparatus of the inner ear?
A. cochlea
B. utricle
C. semicircular canals
D. saccule
Answers
A. cochlea
The cochlea is not part of the vestibular apparatus of the inner ear. It is responsible for hearing rather than balance and spatial orientation, which are functions associated with the vestibular system. The vestibular apparatus consists of the utricle, saccule, and the three semicircular canals, which work together to provide information about head position, motion, and acceleration.
The 5' cap protects the mRNA from {{c1::exonucleases}}
Answers
The 5' cap protects the mRNA from exonucleases, which are enzymes that degrade nucleic acids. The 5' cap is an addition to the 5' end of the mRNA strand that occurs during the maturation process.
It consists of a 7-methylguanine cap connected to the 5' end of the mRNA by a 5'-5' triphosphate linkage. This 5' cap is essential for the protection of the mRNA from exonucleases. Exonucleases specifically degrade the 5' end of mRNA molecules because it has no protective cap.
By adding the 5' cap to the mRNA, it prevents exonucleases from accessing and degrading the mRNA. The 5' cap also plays a role in the recognition of the mRNA by ribosomes. As a result, the 5' cap helps to ensure that the mRNA is translated properly, as the ribosomes can identify the cap as a signal to initiate translation.
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complete question is :-
The 5' cap protects the mRNA from {{c1::exonucleases}}. EXPLAIN.
the most likely cause for the dinosaur extinction was the pleistocene ice age and climate change.T/F
Answers
The given statement is false because The most widely accepted scientific explanation for the extinction of dinosaurs is the impact of a large asteroid or comet at the end of the Cretaceous period, about 65.5 million years ago.
This event, known as the Cretaceous-Paleogene (K-Pg) extinction event, resulted in the extinction of not only dinosaurs but also many other species, including marine organisms and plants.
The impact of the asteroid or comet caused a series of catastrophic events, including massive wildfires, a global impact winter with reduced sunlight reaching the Earth's surface, and widespread acid rain. These conditions severely disrupted ecosystems and led to the extinction of numerous species, including the non-avian dinosaurs.
While climate change and other factors may have played a role in the background, the asteroid impact is considered the primary cause of the mass extinction event. Geological evidence, including the discovery of a large impact crater near Chicxulub, Mexico, supports this theory.
The Pleistocene ice age, on the other hand, occurred much later in Earth's history, beginning around 2.6 million years ago and lasting until approximately 11,700 years ago. This ice age did not directly affect the dinosaurs as they had already gone extinct millions of years prior.
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How does a dog fulfill the three points of the cell theory?
Answers
A dog fulfilled the three points of the cell theory through the healing of the cuts it encountered when playing.
What is a Cell?This is defined as the simplest or basic unit of life and the three points of cell theory include:
All organisms are made of one or more cellsThe cell is the basic unit of all organisms.All cells come from existing cells.The cut the dog had healed as a result of the formation of the cells from existing cells through mitosis thereby resulting in the healing.
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how do palientologists classify fossils how does this compare to the way that biologists classify living animals
Answers
Scientists may be able to predict which species will become extinct by studying fossils. Fossils can be utilized to reconstruct pedigrees and identify family traits.
Scientists can use fossils to determine the time scale over which traits evolved. Scientists can utilize fossils to learn about the traits of ancient animals. Paleontologists compare the properties of species from different historical eras.
They use this information to try to understand how creatures evolved over millions of years Paleontologists classify fossils using physical characteristics that correspond to the Linnaeus system, and the organism then names the genus and species in Latin. A paleontologist collects as many fossils as possible from a rock or silt.
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p. 88
1)Describe the General Trend of human population growth over the last 100,000 years:
Answers
The general trend of human population growth over the last 100,000 years has been characterized by slow and steady growth followed by rapid acceleration in recent centuries.
For most of human history, the global population grew at a slow and steady rate. Estimates suggest that around 10,000 years ago, the world's population was around 5 million people. It took until about 1800 AD for the global population to reach 1 billion people. However, since then, the population has grown rapidly. It took only 130 years for the population to double to 2 billion people, and by 2011, the world population had surpassed 7 billion people. This rapid growth has been driven by a combination of factors, including advances in agriculture, medicine, and technology, which have allowed humans to produce more food, reduce mortality rates, and live longer.
It is important to note that population growth has not been uniform across the globe. Different regions and countries have experienced varying rates of population growth, influenced by factors such as economic development, fertility rates, and access to family planning services.
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How does a cold ocean current affect the climate along the coast?
A. Cold ocean currents do not affect the climate of the coast; only warm currents affect climate. B. The cold ocean current results in a cooler coastal climate. C. The cold ocean current results in a warmer coastal climate. D. The cold ocean current results in a drier coastal climate
Answers
A colder coastal climate is a result of the cold ocean current.
The climate of coastal locations can be influenced by warm and cold ocean currents, but only when local breezes come in from the sea. Warm currents raise the temperature over land by warming the air above the ocean. Cooler air can be brought across land by cold currents, which can also reduce air temperatures.
In order to balance out the unequal distribution of solar energy reaching Earth's surface, ocean currents govern the global climate. Regional temperatures would be more severe without ocean currents, with extremely hot temperatures near the equator and icy temperatures at the poles, and considerably less of Earth's land would be livable.
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Why do the planets move in a fixed orbit?
Answers
The length and millimeters of 6 worms were 96-88 86-84 80 70
Find the mean
Answers
Answer:
The mean for the length of the 6 worms is 84 millimetres.
Explanation:
Okay, before we solve for the mean, you need to understand what the mean is in the first place.
The mean is when you add all the given numbers and then divide by the amount of numbers given.
In this case, we have the numbers 96, 88, 86, 84, 80, 70.
These are the steps:
1. Add all the numbers
96 + 88 + 86 + 84 + 80 + 70 = 504
2. Divide the total of the given numbers by the amount of numbers given.
In this case, it is 6. So it would be 504/6, which equals to 84.
Also, don't forget to put the unit.
Hope this helped. :)
in what part of a chloroplast does the Calvin cycle occur
Answers
Answer:the stroma
Explanation:Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts).
How did the CT enterography and the technetium scan lead to the correct diagnosis?
Answers
Answer: hope it helps..
Explanation: CT enterography is a new non-invasive imaging technique that offers superior small bowel visualisation compared with standard abdomino-pelvic CT, and provides complementary diagnostic information to capsule endoscopy and MRI enterography. CT enterography is well tolerated by patients and enables accurate, efficient assessment of pathology arising from the small bowel wall or surrounding organs. This article reviews the clinical role of CT enterography, and offers practical tips for optimising technique and accurate interpretation.
what are the essential components to document in the assessment of tina’s wound?
Answers
At every dressing change, wounds should be evaluated and recorded. The following elements should be considered during wound assessment:
1) Physical location of the wound
2) What is the type of injury
3) Analysis of the size of the tissue damage,
wound size and bed
4) Periwound skin and wound margins
5) Infection warning signs Pain
The location of a wound also reveals details about its type and causation. For instance, a wound around the ankle of a patient with venous insufficiency is likely a venous ulcer, while a wound over the sacral area of an immobile patient is likely a pressure injury.
Based on the origin of the wound, various wound types necessitate various therapies for optimal healing.Examine the wound base's colour is also equally important.
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What are the essential components to document in the assessment of Tinus wound?
PLEASE RESPOND FAST!!!!!!!!!
_____ pressure is what gives plants that are not woody their rigid structures.
Hypertonic
Hypotonic
Turgor
Turgid
Isotonic
Answers
Answer:
I'd say C.)
Explanation:
Turgor pressure, also called turgidity when occurring in trees and most plants are the pressure of cell contents exerted against the plant cell wall including tree leaf and stem cells. ... This force consequently gives a succulent plant rigidity and helps non-woody plants to keep erect.
What's the difference between cmp and bmp?
Answers
The difference between cmp and bmp is that bmp is bioretention filters and cmp is Management Practice.
What is the function of bioretention filters?The bioretention filters cleans the water of impurities such as sediments and redirects the cleaned runoff into the arboretum and the pond. The water moves through layers of rock and soil to remove impurities.
This Best management Practice is storm water management that addresses the problem of impervious surface runoff and filters it into high quality runoff.
Therefore, The difference between cmp and bmp is that bmp is bioretention filters and cmp is Management Practice.
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the critical period for major anomalies is longest for the ____
Answers
The critical period for major anomalies is longest for the organogenesis stage of embryonic development
organogenesis stage of embryonic development, which occurs during the first 8 weeks of gestation in humans. This is because during organogenesis, the major organs and body systems of the developing embryo are formed, and any disruption or interference with this process can lead to major congenital anomalies. After the organogenesis stage, the fetus continues to grow and mature, but the risk of major anomalies decreases. However, exposure to certain teratogens, such as drugs, alcohol, and certain infections, at any stage of development can still have adverse effects on the developing fetus.
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49
LO
The two main targets currently used in anti-HIV therapy are:
A- Reverse transcriptase and protease
B- Integrase
Protease and integrase
D- Protease.
Answers
Answer:
B-Integrase
D-Protease
Both are correct...
Hope it's help you...☺️
MARK AS BRILIANT
What are the charges and relative masses of the subatomic particles and locations found in the model?
Answers
But the general answers are
Name : Location : Charge : Mass
Proton: Nucleus : +1 : 1
Neutron: Nucleus : 0 : 1
Electron : Outer shell : -1 : 1/1800
(electron mass varies from different sources)
The indivisible particles present in an atom are called subatomic particles. The proton and electron have opposite charges, while the neutrons have no charge.
What are subatomic particles?Subatomic particles are found inside the atoms and are assigned to specific positions based on their charges and masses. The neutrons are located in the center of the atom called the nucleus with a neutral charge and a relative mass of 1 amu.
The protons are found along the neutron but are said to carry a positive charge with a relative mass of 1 amu. On the other hand, electrons are said to be located outside the nucleus in the orbitals, with a relative mass of 0.0005 amu and charge -1.
Therefore, the subatomic particles have varied in charges and relative masses.
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Which is a function of the central nervous system? Ingenuity
Answers
Answer:
It controls all voluntary movement, such as speech and walking, and involuntary movements, such as blinking and breathing. It is also the core of our thoughts, perceptions, and emotions.
Explanation:
None.
an earthworm turns away from light
Answers
Answer:
An earthworm turns away from light. Characteristic referred in this statement is Photophobia
Explanation:
during transcription, was the adenine at the left-hand side of the sequence the first or the last nucleotide added to the portion of
Answers
During transcription, the adenine on the left side of the sequence was the last nucleotide added to a portion of the mRNA.
When RNA polymerase crosses the stop (termination) sequence in the gene, transcription is terminated, marking the end of the process.After the mRNA strand is complete, it is separated from the DNA. A strand of RNA that is complementary to the DNA template is made by RNA polymerase. The three phases of translation are initiation, extension, and termination. When the DNA template strand is read in the 3' to 5' direction, the RNA strand in the 5' to 3' direction is synthesized.
Translation (from mRNA to protein) and transcription (DNA to mRNA) are so closely linked in prokaryotic cells that translation often begins before transcription is complete.
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The question was incomplete. Check below the complete question.
The following is a portion of an mRNA sequence: 3'-AUCGUCAUGCAGA-5'. During transcription, was the adenine at the left-hand side of the sequence the first or the last nucleotide added to the portion of mRNA shown?
1. The linking of monomers to form a polymer occurs through the process known as
Answers
Answer:
Dehydration
Explanation:
It's known as dehydration because the removal of water it what makes the monomers link togetgher to form polymers.
Some archaea live in remarkably saline environments. What is the challenge of living in a highly saline environment?.
Answers
The challenge of living in a highly saline environment is maintaining a balance of salt concentration within the cells.
In a highly saline environment, there is an abundance of salt outside of the cells. If the salt concentration inside the cells is too low, water will flow out of the cells, causing them to shrink and die. On the other hand, if the salt concentration inside the cells is too high, water will flow into the cells, causing them to burst. Therefore, maintaining a balance of salt concentration within the cells is crucial for survival in such environments.
Archaea living in highly saline environments have adapted various mechanisms to maintain this balance, such as pumping salt out of the cell or synthesizing compatible solutes to counteract the high salt concentration. These adaptations allow them to survive in environments that would be lethal to most other organisms.
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5 Devise Imagine that one tree outside your
school looks unhealthy, although all the other
trees seem healthy and strong. Describe how
you could apply scientific thinking to the
situation.
Answers
Reproduction is the function of both ______ and organisms.
Answers
Answer:
el sapoel sapo i
s
Explanation:
Answer:
Offspring
Explanation:
