The statements below which best explains what happened during the Cambrian Explosion is that the first animals to have hard, preservable parts (shells and exoskeletons) evolved during this period and is therefore denoted as option A.
What is Cambrian Explosion?
This is referred to as an occurrence which occurred millions of years ago in which there was a wide variety of animals which burst onto the evolutionary scene.
This thereby gave rise to the evolution of the first animals to have hard, preservable parts such shells and exoskeleton and is therefore the reason why option A was chosen the correct choice.
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The full question is:
About 530 million years ago, the most advanced life-form on the planet were aquatic burrowing worms. Within a few million years, the ocean was filled with starfish, sponges, jellyfish, mollusks, and the ancestors of true fish. Scientists refer to this period as the Cambrian Explosion. Which of the statements below best explains what happened during the Cambrian Explosion?
the first animals to have hard, preservable parts (shells and exoskeletons) evolved during the Cambrianan extinction event destroyed nearly all fossils that existed at the end of the Vendian Perioda mass migration at the end of the Vendian Period localized species in a more concentrated areathe gradual warming of the climate during the Cambrian Period encouraged the proliferation of speciesHow is the human proteome project different from the human genome project
The human proteome project is to experimentally observe all of the proteins produced by the sequences translated from the human genome while the human genome project was to generate the first sequence of the human genome is to generate the first sequence of the human genome.
What is a Genome?This is referred to as the entire set of DNA instructions found in a cell and it consists of 23 pairs of chromosomes located in the cell's nucleus.
The human proteome project was different from the human genome project such that the former was to experiment on the proteins produced by the sequences translated from the human genome while the latter was to generate the first sequence of the human genome.
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How do humans effect the marine ecosystem?
Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming.
About Marine ecosystemsMarine ecosystems are life in the sea that includes biotic (living) and abiotic (non-living) elements. In essence, everything contained in the sea is included in the marine ecosystem.
The biotic elements are fish, shellfish, algae, and anemones. While the abiotic elements are water, oxygen, sunlight, salt, sand, and rocks.
Citing various sources, the sea has an area of more than two-thirds of the earth's surface or around 71 percent.
Because it is so broad, the food chain is diverse. One of the food chains in a marine ecosystem is energy sun-algae-small fish-big fish-sharks-decomposers.
In this food chain, solar energy helps algae photosynthesize. The results of algae photosynthesis are food for small fish.
Small fish as first consumers are then eaten by big fish. Sharks occupy the highest place as predators that eat large fish. Then it will be broken down by decomposers when it dies.
The importance of the marine ecosystem because it provides many benefits for life, such as a place for research, a source of food, a source of drinking water, as a tourist attraction, flood control, and a place for cultivating shellfish, fish, and others.
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What do your data tell you about how the intensity (amount) of light affects the rate of photosynthesis performed by the plant? Remember that a rate involves a change in amount over time. Does this answer make sense? Why or why not?
The data tell that the high intensity (amount) of light affects the rate of photosynthesis performed by the plant by leading to an increase in it.
What is Photosynthesis?This is referred to as the process in which green plants manufacture their food in the presence of sunlight and other compounds such as water etc.
The green pigment known as chlorophyll is responsible for trapping the sunlight in plants and is responsible for providing the needed energy which is used to power the reaction. This therefore means that an increase in the light intensity will lead to a corresponding increase in the rate of photosynthesis.
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From the experiment, it can be concluded that at low intensities, the rate of photosynthesis increases with the increase in the amount of light intensity. Therefore, the rate of photosynthesis is directly proportional to the light intensity and inversely proportional to the distance.
WILL MARK BRAINILEST!! PLEASE HELP
You can measure humidity in your own backyard. (10 points)
A. What tool could you use to measure humidity in your backyard? (4 points)
B. What steps should you follow to measure humidity with this tool? (4 points)
C. What result will let you know the air has a low humidity? (2 points)
Technically this is Earth Science
What will be the volume of an object that mass is 100 g and density is 0.8 G/mL
This calculator will calculate object density based on the mass and volume inputted, and it will display two conversion levels for mass and density.
Was conversion a technical term?
What is the definition of conversion? Biblically speaking, conversion refers to a turning—a spiritual moving toward Christ in faith and away from sin through repentance. It is a drastic veering off of one road to pursue a completely different one.
What different sorts of conversion are there?
Conventional conversion, no translation, and user-defined non - standard conversion are the three different forms of conversion that are available. A conversion factor is a ratio expressed as a fraction that equals.
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The transfer of genes from one population to another drives the changes that occur in populations a permanent change in the dna sequence of a gene the random change in the frequency of an allele in a population.
The mechаnism to the following stаtements аre:
а. The trаnsfer of genes from one populаtion to аnother is gene flow.
b. Drives the chаnges thаt occur in populаtions аre due to nаturаl selection.
c. А permаnent chаnge in the DNА sequence of а gene is mutаtion.
d. The rаndom chаnge in the frequency of аn аllele in а populаtion is genetic drift.
Evolution is the process by which populаtions of orgаnisms chаnge over generаtions. Genetic vаriаtions underlie these chаnges. Genetic vаriаtions cаn аrise from gene vаriаnts (аlso cаlled mutаtions) or from а normаl process in which genetic mаteriаl is reаrrаnged аs а cell is getting reаdy to divide (known аs genetic recombinаtion).
Genetic vаriаtions thаt аlter gene аctivity or protein function cаn introduce different trаits in аn orgаnism. If а trаit is аdvаntаgeous аnd helps the individuаl survive аnd reproduce, the genetic vаriаtion is more likely to be pаssed to the next generаtion (а process known аs nаturаl selection).
Your question is incomplete, but most probably your full question was
Identify the mechanism discussed below.
a. The transfer of genes from one population to another:
b. Drives the changes that occur in populations:
c. A permanent change in the DNA sequence of a gene:
d. The random change in the frequency of an allele in a population:
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whats better cats or dogs? why
Answer:
dogs
Explanation:
they can be trained way easier than cats. and they make a great companions bc if you treat them right they will love and protect you. unlike cats who would rather protect themselves
The Geologic Time Scale is broken up into several periods of time, how is each period different?
The units of the geologic time scale are eons, eras, periods, epochs, and ages.
How is Earth's geologic time scale broken into different periods?The geologic time scale is the representation of time based on the rock record of the Earth. It is a system of chronological dating that uses chrono stratigraphy and geochronology. It is used by Earth scientists (including geologists, paleontologists, geophysicists, geochemists, and paleo climatologists) to describe the timing and relationships of events in the geologic history.
The calendar for events in the Earth history is the geologic time scale. Eons, eras, periods, epochs, and ages are only a few of the named units of abstract time that it divides all of time into.
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Section 2: Conduct internet research on your selected ecosystem to help you generate a list of three criteria and two constraints. Your criteria and constraints should consider relevant factors to the problem, such as costs, reliability, safety (to humans and wildlife), human needs, environmental impact, local biodiversity, and the aesthetics of the area. List the criteria in order of most to least important and assign each to a related sub-problem. In the rationale column, explain why you placed your criteria in the order you selected.
Please use the Kitakami River Region
The largest environmental problem brought on by fertiliser use is water contamination from nitrate and phosphate. The nitrogen from manures and fertilisers is eventually converted into nitrates by bacteria in the soil.
What is an ecosystem?Plants, animals, and other species interact with their surroundings, the weather, and other elements in an ecosystem to produce a "bubble of life." Ecosystems cohabit with biotic and abiotic factors, or nonliving elements.. Biotic factors include plants, animals, and other species. A group of living things (plants, animals, and bacteria) in a certain location is referred to as an ecosystem.Eco denotes a geographical area on the world, whereas system denotes the organising components.
Why is ecosystem important?Healthy ecosystems maintain our soil's fertility, clean the air, control the climate, recycle nutrients, and give us food. All civilizations are built on them, and they also power our economies.
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Baed on the propoed ignaling pathway, predict the relative amount of phophorylated to unphophorylated kinae D
in the Brec-WT
cell when the cell are grown in nutrient broth lacking B
The relative amount of phosphorylated kinase D will be less than the unphosphorylated Kinase D protein as lacks the first messenger B.
It is given that protein A is involved in the stimulation of growth and blood vessels form in the cell.
In presence of first messenger B:
The process takes place when signal B is present in the nutrient broth, this B attaches to Brec wild protein which initiates the signaling cascade.In presence of signaling, there is phosphorylation of D (inactive), which is converted into phosphorylated D (activated ).In absence of the first messenger B:
So if signal B is absent in the nutrient broth, then there will be no activation of the Brec receptor and no phosphorylation of the D protein. In this condition, the phosphorylated D amount will be less in the cell than the unphosphorylated D.
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What are the possible blood types of the child if the father has AB blood type and the mother has a blood type?
If the father has AB blood type and the mother has a blood type, the possible blood types of the child are A, B, AB and O.
The blood type of a child is determined by the combination of genes inherited from the mother and father. This is because the AB blood type is a combination of both A and B blood types and the "O" blood type is the universal donor blood type that can donate blood to recipients of any ABO blood group.
So any combination of those genes can result in one of the four possible blood types.
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Your question is incomplete but probably, the complete question was:
What are the possible blood types of the child if the father has AB blood type and the mother has a blood type?
A
B
AB
O
Either A or B
how does bacteria affect the nitrogen cycle??
Answer: Nitrogen-fixing bacteria in the soil and within the root nodules of some plants convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates. Ammonia, nitrites, and nitrates are all fixed nitrogen and can be absorbed by plants.
Which of the following is not a way in which trees benefit the environment?
a.They remove a significant amount of carbon dioxide from the atmosphere.
b.They remove a significant amount of oxygen from the atmosphere.
c.Their roots hold soil in place, reducing rates of erosion.
d.They remove ozone and particulates from the atmosphere.
It is not a way in trees benefit the environment they remove a significant amount of oxygen from the atmosphere. The correct option is (B).
What do you mean by the benefit the environment?The preservation of special habitat and local biodiversity is a significant environmental advantage. Unaltered natural regions are essential for food, shelter, and reproduction for wildlife and vegetation, often in ways that people have not always understood.
Reducing or eliminating harmful emissions at the point of use is good for the environment. along the entire fuel chain, a reduction or elimination of carbon dioxide and other greenhouse gas emissions.
Therefore, it is not a way in trees benefit the environment they remove a significant amount of oxygen from the atmosphere
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The first step taken when looking through the oculars of a microscope is to adjust the oculars until only one circle of light can be viewed.
True
False
Answer:
True
Explanation:
If multiple circles of light can be seen when looking through the lenses, they should be adjusted a position that produces just one circle of light. This allows the sample to be seen clearly when the next steps are taken, such as adjusting the magnification and focus.
How many different mutations have been identified for cystic fibrosis?
As of 2019, more than 2,000 different mutations have been identified for cystic fibrosis.
Cystic fibrosis (CF) is a genetic disorder that impacts the lungs, digestive system, and other organs of the body. It is caused by a mutation in a gene known as the cystic fibrosis transmembrane conductance regulator (CFTR). This gene produces a protein that controls the movement of salt and water in and out of cells. When the CFTR gene is mutated, the protein cannot function properly, leading to thickened and sticky mucus that can clog the lungs and trap bacteria.
The exact number of CFTR mutations is unknown, but researchers have identified more than 2,000 different mutations associated with cystic fibrosis. Some of these mutations are more common than others, but all of them can cause the same symptoms. The severity of the symptoms, however, can vary depending on the specific mutation.
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A green pea plant (yy) is crossed with a yellow pea plant (YY).
If a green pea plant (yy) is crossed with a yellow pea plant (YY) then all offspring will be yellow and heterozygous for the trait with genotype Yy.
What is a heterozygous genotype?A heterozygous genotype is a genetic composition in which two different alleles are present for a particular gene, thereby both gene variants may contribute to the phenotype when it does not involve complete dominance such as occurs in this case.
Therefore, with this data, we can see that a heterozygous genotype is composed of two different alleles that may contribute to the phenotype.
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Define the following terms.
Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
autotetraploid
paracentric inversion
Edwards syndrome
pericentric inversion
Patau syndrome
monosomy
trisomy
euploidy
autopolyploidy
allopolyploidy
amphidiploid
aneuploidy
1. is a general condition when an organism gains or loses one or more chromosomes but not a complete set.
2. is a general condition where complete haploid sets of chromosomes are present.
3. is a loss of one chromosome from an otherwise diploid genome.
4. is a gain of one chromosome in addition to an otherwise diploid genome.
5. is a trisomy of chromosome 13 in humans.
6. is a trisomy of chromosome 18 in humans.
7. is the addition of one or more extra sets of chromosomes, identical to the normal haploid complement of the same species.
8. is the case of polyploidy when the chromosomes originate from the hybridization of two different species, usually closely related.
9. is a polyploid that has two extra sets of chromosomes, identical to the normal haploid complement of the same species.
10. is an autotetraploid derived from two known original species.
11. is an inversion that has breakpoints that include the centromere
12. is an inversion that has breakpoints that do not include the centromere
1. When an organism gets or loses chromosomes, but not a full set, it is said to be aneuploid.
2. The presence of entire haploid sets of chromosomes is referred to as euploidy.
3. A monosomy is a diploid genome that has lost one of its chromosomes.
4. Trisomy is the addition of one chromosome to a genome that is normally diploid.
5. Humans with Patau syndrome have a trisomy of chromosome 13.
6. In humans, chromosome 18 trisomy causes Edwards syndrome.
7. The insertion of one or more additional sets of chromosomes that are identical to the typical haploid complement of the same species is known as autopolyploidy.
8. Allopolyploidy is a kind of polyploidy in which the chromosomes are the result of the hybridization of two distinct
11. The centromere is one of the breakpoints for the inversion known as pericentric inversion.
12. A paracentric inversion is one that does not have breakpoints at the centromere.
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What is processed food in the stomach called?
Processed food in the stomach is referred to as a bolus. A bolus is a semi-solid mass of food that is formed in the mouth by the mechanical and chemical actions of chewing and saliva.
It is the first step in the digestive process, as it is composed of food that has been partially broken down and is now ready to be further processed by the digestive system.
The bolus is first swallowed and then enters the stomach, where it is further broken down by the action of stomach acids and digestive enzymes. These enzymes break down the food into smaller molecules so that they can be absorbed by the small intestine and eventually enter the bloodstream. Ultimately, these molecules provide the body with energy and the essential nutrients it needs to function.
Processed foods are those that have been altered from their natural state in some way, such as by cooking, canning, freezing, or adding preservatives. These processed foods are easier to digest than their unprocessed counterparts, but their nutritional content may not be as high.
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The process of mitosis is the same in plant and animal cells until the division of the cytoplasm. At this stage, plant cells develop ___________.
At the stage of cytoplasm division in the process of mitosis, plant cells develop a cell plate, also known as the cell plate, also known as the cell plate. This structure eventually will form the cell wall between the two daughter cells. Animal cells do not develop a cell plate and instead rely on contractile fibers in the cell called microfilaments to pull the chromosomes apart and physically separate the cytoplasm of the cell.
Damage to ependymal cells would most likely affect the formation of myelin sheaths. repair of axons. formation of cerebrospinal fluid. transport of neurotransmitters within axons. formation of ganglia.
Damage to ependymal cells would most likely affect the formation of myelin sheaths. Formation of cerebrospinal fluid.
Ependymal cells are a type of glial cell that line the ventricular system of the brain and the spinal cord.
They are responsible for producing and circulating cerebrospinal fluid (CSF), which plays important roles in maintaining the structural integrity of the brain and spinal cord, as well as providing a medium for the exchange of nutrients, waste products, and neurotransmitters between the brain and the blood.
Damage to ependymal cells would most likely affect the formation of cerebrospinal fluid, not myelin sheath formation, repair of axons, transport of neurotransmitters within axons, or formation of ganglia.
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draw and label one complete cell cycle
The cell cycle is comprised of the following steps: Mitosis (prophase, metaphase, anaphase, telophase) and cytokinesis follow interphase (G1, S, G2). During interphase, the cell prepares to divide, organelles duplicate, and DNA replicates in the S phase.
The cell cycle is a four-stage process during which the cell grows (gap 1, or G1), replicates its DNA (synthesis, or S), prepares to divide (gap 2, or G2), and divides (mitosis, or M, stage).
The cell cycle is divided into four stages: gap 1 (G1), synthesis (S), gap 2 (G2), and mitosis (M). A single cell cycle takes about 24 hours for most human cells.
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What was Mendel's first conclusion about pea plants?
Answer:
Mendel found that crosses between parents that differed for one trait produced F1 offspring that all expressed one parent's traits.
Explanation:
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A polyunsaturated fatty acid contains more than one
A) carboxyl group
B) hydroxyl group
C) carbonyl group
D) long carbon chain
E) carbon-carbon double bond
A polyunsaturated fatty acid contains more than one carbon-carbon double bond.
A polyunsaturated fatty acid is a type of fatty acid that contains more than one carbon-carbon double bond. This means that there are multiple places in the fatty acid where two carbon atoms are bonded together with a double bond, rather than a single bond. The presence of these double bonds results in a kink in the fatty acid's long carbon chain, which can affect the properties and behavior of the fatty acid. These fatty acids are considered beneficial for heart health, however, it is important to consume them in moderation as part of a healthy diet.
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What human activities are involved in burning fossil fuels?
Burning fossil fuels involves activities such as mining, transporting, and combusting the fuel. Depending on the application, burning fossil fuels may yield electricity, heat or other forms of energy. Its emissions are known to have negative environmental impacts, including increasing the amount of carbon dioxide in the atmosphere.
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where do the processes happen?
a. photosynthesis as a whole:
b. light-dependent reactions:
c. calvin cycle:
Answer:
Explanation:
a. Photosynthesis as a whole: Photosynthesis is a process that occurs in the chloroplasts of plant cells. Chloroplasts are organelles found in plant cells that are responsible for capturing light energy and converting it into chemical energy through the process of photosynthesis.
b. Light-dependent reactions: The light-dependent reactions of photosynthesis take place in the thylakoid membrane of chloroplasts. These reactions involve the absorption of light by pigments, mainly chlorophyll, which then transfer the energy to specialized protein complexes. These protein complexes then generate ATP and NADPH, which are used in the next stage of photosynthesis.
c. Calvin cycle: The Calvin cycle, also known as the dark reactions, take place in the stroma of chloroplasts. The stroma is the fluid-filled area outside the thylakoid membrane. The Calvin cycle is where the chemical energy generated during the light-dependent reactions is used to fix carbon dioxide into glucose and other sugars, using the energy stored in the ATP and NADPH molecules.
In summary, photosynthesis, the process that allows plants to convert light energy into chemical energy, occurs in the chloroplasts of plant cells. The light-dependent reactions take place in the thylakoid membrane and the Calvin cycle takes place in the stroma of the chloroplasts.
why is it important to assign each organism a scientific name?
In order to classify an organism as a species and assign it a scientific name, one must give a thorough description that identifies the traits that set it apart from other similar or related creatures.
These names make it possible for the scientific community to share a name database. Without them, discussing various species is difficult to do. Binomial nomenclature is the system used to classify species, and it gives each organism a general name for the family it belongs to as well as a unique name to identify it. A natural history museum needs to receive a voucher specimen.
To ensure that there is a term that all the scientists gathered for a discussion would understand, it is crucial to give every living creature in the world a scientific name. If there is no scientific name, different scientists will refer to a single species, such as the mango, by different names.
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Compare the horseshoe crab that lives today with the fossil that is millions of years old. What kind of habitat do you think its fossilized ancestor lived in? Explain your answer.
Answer: Horseshoe crab fossils have been estimated to be 445 million years old. They co-evolved with other primitive arthropods called trilobites, a long-extinct close relative of the horseshoe crab, in the shallow seas of the Paleozoic Era (540-248 million years ago).
Which option describes a disadvantage of genetic engineering in agriculture?
Answer: (*Cracks Knuckles*)
Explanation: Food safety, environmental effects, and socioeconomic issues,cross-pollination, pest resistance, human health, the environment, the economy, and productivity.
What is the theory of punctuated equilibrium?
It describes the rate of geologic time.
It explains why mass extinctions occur.
It describes one way that new species arise.
It explains how domestic animals evolved.
The theory of punctuated equilibrium describes one way that new species arise.
The third option is correct.
What is Punctuated equilibrium?Punctuated equilibrium is described as a term, which signifies the change in evolution of animals and plants in a comparative static manner.
The theory of punctuated equilibrium states these changes takes place in shots of time intermittently which is in contrary to the concept that life forms modify gradually with time in response to their surroundings,
The term is also in contrary to Darwin's more dynamic evolution model. In conclusion, punctuated equilibrium suggests that evolution only occurs in bursts of time, which are brisk.
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Why is type O negative blood considered the universal red blood cell donor?
It has all three types of antigens.
It has all three types of antibodies.
It lacks all three types of antigens.
It lacks all three types of antibodies.
Type O blood type is the only blood group that is safe to utilize in an emergency when a patient's blood group is unknown. The fact that it works with all blood groups is the explanation.
What are the four main blood type categories?
The four main blood types (groups) are A, B, AB, and O. The genes you inherited from your parents define your blood type. There are a total of 8 blood types, each of which can be either Right hand drive positive or Right hand drive negative.
What blood type is the rarest?
Only 1% of our contributors have AB negative, the rarest of a seven major blood types. Although being in little supply, there is
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