Answer:
Chromosomes are coiled structures made of DNA and proteins. Chromosomes are the form of the genetic material of a cell during cell division. It is this coiled structure that ensures proper segregation of the chromosomes during cell division. During other phases of the cell cycle, DNA is not coiled into chromosomes
Chromosomes' tightly coiled structure enables them to be properly segregated during cell division.
Chromosomes:Chromosomes are coiled structures made of DNA and proteins.Chromosomes are the form of the genetic material of a cell during cell division. It is this coiled structure that ensures the proper segregation of the chromosomes during cell division.During other phases of the cell cycle, DNA is not coiled into chromosomes. It exists as a grainy material called chromatin.
Thus, we can conclude that during cell division chromosomes' tightly coiled structure enables them to be properly segregated.
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What evidence do fossils provide for how life has changed throughout Earth's history?
Answer:
Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet's history. They can also help scientists reconstruct the evolutionary histories of present-day species.
Explanation:
Hopes this helps!
Consist mainly of neuron cell bodies
Answer:
Ganglia are composed mainly of neuron cell bodies (somata) and dendritic structures. They are the intermediary connections between the peripheral and central nervous systems.
Which of the following statements about diffusion is FALSE?
Question 39 options:
smaller surface area of the cell membrane increases the diffusion rate
small molecules travel much faster than larger molecules
a higher concentration gradient increase the diffusion rate
higher temperatures allow for molecules to move quickly across the cell membrane
Answer:
smaller surface area of the cell membrane increases the diffusion rate
Explanation:
Diffusion is the process by which molecules move from a region of high concentration to a region of low concentration until there is an even distribution. The rate at which diffusion occurs is dependent on certain factors as follows:
- Temperature: An increase in temperature increases the rate of diffusion because there is an increase in the kinetic energy of the molecules in response to temperature.
- Surface area of the cell: A cell with large surface area undergoes diffusion at a higher rate than a cell with small surface area.
- Concentration gradient: The difference in concentration of the molecule on each side of the membrane is the CONCENTRATION GRADIENT, which when increased also increases the rate of diffusion.
- Size of molecules: small molecules tend to travel faster than larger ones, hence, they diffuse faster.
Earths orbit is an almost circular repeating path around the sun. Earth is held in its orbit by gravity or asteroids?? Please HELP
Answer:
earth is held in its orbit by gravity
Explanation:
Because the earth is orbiting by gravity not asteroid Because asteroids will cause a disaster
when a plant doesnt have enough water, it will wilt and____.
the amount of carbon dioxide will increase.
the amount of carbon dioxide will decrease.
the amount of oxygen will increase.
the rate of photosynthesis will increase.
Answer:
the rate of photosynthesis will increase
Explanation:
George Box, a famous statistician, once said, "All models are wrong, but some are useful.” What did George Box mean by this statement?
Answer:
The 2nd part, "But some are useful" - simplifications of reality can be quite useful. They can help us explain, predict and understand the universe and all its various components. The idea of this quote is that every single model will be wrong, meaning that it will never represent the exact real behaviour.
George Box, a famous statistician, once said: "All models are wrong, but some are useful" he made an aphorism stating that mathematical models are flawed.
What is an aphorism?Maxim or sentence that, in a few words, explains a rule or principle of moral significance; apothegma, saying. “Short and succinct text, foundation of a fragmentary and unsystematic style in philosophical writing.
With this information, we can conclude that George Box, a famous statistician, once said: "All models are wrong, but some are useful" he made an aphorism stating that mathematical models are flawed.
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The pancreas produces all of the following digestive enzymes except:
A. Pepsin
B. Trypsin
C. Chymotrypsin
Answer: the answer is C
Explanation:
Pancreatic proteases (such as trypsin and chymotrypsin) - which help to digest proteins.
Which organism is not extinct
Answer:
humans and deer
What occurs when a pure gaseous substance is heated?
Please answer fast!
Answer:
its molecules start moving at a much faster speed and this consequently causes an increase in pressure within the container holding the gas. If the container is not strong enough, the activity of the gas molecules is likely to cause it to burst
hope this helps
Explanation:
ayers.
Which statement is accurate?
O Layer C is younger than layer A.
O Layer D has an older relative age than layer C.
O If a geologic event tilted these layers, layer B would
no longer be the oldest.
O It is possible to determine the absolute age of layer C
with the information given.
Answer it’s A
Human beings are at 98.6F, which is roughly 300K. What wavelengths do we emit the most?
Question 4 options:
Red
Blue
Infrared
Radio
Ultraviolet
Answer:
Infrared.
Explanation:
The Infrared wavelength emitted by humans the most because of the temperature of the body. Infrared is an electromagnetic radiation having a frequency lower than visible light. The wavelength of radiation emitted depends on the temperature of the objects. Different objects emit different radiation wavelength due to their internal body temperature. Such type of radiation is known as thermal radiation. Most of the radiation emitted by human body is the infrared, having the wavelength of 12 micron.
Why does the lake need to be older than the canyon for the spillover theory to work?
Answer: Over thousands of years, the water filled one basin and then spilled over into the next, like a series of bathtubs overflowing.
Explanation:
Darwin was influenced to propose evolution by natural selection based on changes that farmers are able to obtain by means of __________ selection.
By means of natural selection.
I think natural could be the word
help pleasee
Many plants produce seeds which have small hooks on them. These hooks will attach to animals as they
move past the plants. What process do these hooks help the plant with?
A. pollination
B. fertilization
C. germination
D. seed dispersal
Answer:
A. Pollination
Explanation:
Because the "Hook" is helping the "Seed" get to other places to grow.
when can experimental growth happen
Answer:
Exponential growth may occur in environments where there are few individuals and plentiful resources, but when the number of individuals becomes large enough, resources will be depleted, slowing the growth rate.
Exponential growth may occur in environments where there are few individuals and plentiful resources, but when the number of individuals becomes large enough, resources will be depleted, slowing the growth rate
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Application of surface tension in respiratory system
Answer:
The force of surface tension in the lungs is so great that without something to reduce the surface tension, the airways would collapse after exhalation, making re-inflation during inhalation much more difficult and less effective. Collapse of the lungs is called alectasis.
Explanation:
Osmotic pressure is directly correlated with tonicity
Answer:
I'm pretty sure this is true.
Explanation:
:)
Two protein kinases, PK1 and PK2, work sequentially in an intracellular signaling pathway.You create cells that contain inactivating mutations in the genes that encode either PK1 or PK2 and find that these cells no longer respond to a particular extracellular signal.You also create cells containing a version of PK1 that is permanently active and find that the cells behave as though they are receiving the signal even when the signal is not present.When you introduce the permanently active version of PK1 into cells that have an inactivating mutation in PK2, you find that these cells also behave as though they are receiving the signal even when no signal is present.
A.From these results, does PK1 activate PK2, or does PK2 activate PK1? Explain your answer.
B.You now create a permanently active version of PK2 and find that cells containing this version behave as though they are receiving the signal even when the signal is not present.What do you predict will happen if you introduce the permanently active version of PK2 into cells that have an inactivating mutation in PK1?
Answer:
a. PK2 activates PK1
b. no response would be produced
Explanation:
Kinases are enzymes known to phosphorylate different substrates, thereby activating/inactivating them. In this case, a mutation that produces a constitutively (permanently) active PK1 kinase is itself able to continue the signaling pathway, independently of whether or not PK2 is present. This constitutive mutation shows that PK1 is recruited to continue signaling events within the cell and, therefore, PK1 activation is downstream in the signaling pathway. Conversely, cells containing active PK2 and inactive PK1 would be unable to continue the signaling pathway since PK2 activation is upstream of the induction of PK1, and thereby these cells cannot respond to the signal (PK2 activation).
which substances needed for photosynthesis is carried into a leaf from the stem
Answer:
water
Explanation:
The main substances needed for photosynthesis are carbon dioxide and water. Carbon dioxide enters the leaves through tiny openings on the leaf called stomata. The water is pulled up from the ground through the roots, up the stem, and into the leaves.
Match each clade to the unique innovation(s) that characterize it.
Reptiles and Birds, Mammals
Ecdysozoa
Chordates
Eukaryotes
Opisthokonts
Deuterostomes
Match each of the options above to the items below.
NotochordNotochord
Endoskeleton
Nucleus + mitochondria
Single flagellum
Amniotic egg
Ecdysis
Answer:
The correct answer is -
Notochord= Chordates
Endoskeleton= Deuterostomes
Nucleus+mitochondria= Eukaryotes
Single flagellum= Opisthokonts
Amniotic egg= Reptiles, birds, and mammals
Ecdysus= Ecdysozoa
Explanation:
The notochord is a flexible rod-like structure that is present in all chordates in their embryological stage and gives its name Chordata. It gives support through the length of the body and present between the nerve cord and digestive tube.
All vertebrates especially deuterostomes have an endoskeleton made up of bones or cartilage.
Nucleus and mitochondria are two double-membrane structures present in all eukaryotic cells and organisms.
Opisthokonts have a characteristic feature to have flagellated cells. These organisms have a single posterior flagellum. Amniotic eggs are produced by birds and reptiles only.
An animal with a larval form that disperses by drifting in ocean currents and an adult form that is attached to a surface is most likely to exhibit ______ as a larva and ______ as an adult. bilateral symmetry . . . bilateral symmetry bilateral symmetry . . . be asymmetrical radial symmetry . . . radial symmetry radial symmetry . . . bilateral symmetry bilateral symmetry . . . radial symmetry
Answer:
Bilateral symmetry as a larva
Radial symmetry as an adult
Explanation:
Bilateral symmetry refers to the division of the animal through a longitudinal plane, int two mirror-image, right and left halves, as seen in organisms such as insects, reptiles or in man. Animals with bilateral symmetry have anterior and posterior halves (head and tail), dorsal and ventral (front and back), and right and left sides. Most animals are bilaterally symmetrical. Animals with bilateral symmetry are best suited for active lifestyles involving streamlined and directional motion.
Radial symmetry refers to the arrangement of body parts around a central axis, just like rays on a sun, ie.they have bodies that seem to radiate outwards from a central point. Animals that are radially symmetrical have top and bottom surfaces only but no left and right sides, or front and back sides. Animals that have radial symmetry are best suited for sedentary lifestyles and are usually attached to some surface (sessile)
An animal with a larval form that disperses by drifting in ocean currents and an adult form that is attached to a surface is most likely to exhibit bilateral symmetry as a larva and radial symmetry as an adult.
(b) Using the template of the phylogenetic tree, circle the lineages that share node
Complete question:
(b) Using the template of the phylogenetic tree, circle the lineages that share node A. You will find the tree in the attached files.
Answer:
The Lineages that share node A are
Chinese river dolphinAmazon river dolphinLa Plata river dolphinDolphinsNarwhalPorpoisesExplanation:
The phylogenetic tree is composed of,
Lineages → These are the taxonomic groups of interest placed in the extremes of the lines called branches. Nodes → These are the ramification points, which are also known as divergence points. They represent the location of the most recent common ancestor. Root → This is the older common ancestor that all lineages share. The first one in the tree.- Two or more lineages are more related to each other if they share a recent common ancestor. This means that they all diverge from the same node.
- Two or more lineages are less related to each other if they lack a recent common ancestor. This is, the node from which these lineages diverge is placed far away in the tree.
There are also different phylogenetic relationships between lineages.
Apomorphies → Occur when the involved lineages share a trait that they inherited from their most recent common ancestor. This trait evolved for the first time in this ancestor. → This relationship is a homology.Plesiomorphies → occur when the involved lineages share a trait inherited from a common ancestor, but that is older concerning the present traits exhibited by other descendants of the same common ancestor. → This relationship is a homology.Homoplasy → Lineages share a trait that evolved independently in each group. → This relationship is an analogy.Firstly the question is incomplete the image is not attached with it which shows the phylogenetic tree.
The Lineages that percentage node A are
Chinese river dolphin river dolphinLa Plata river dolphinDolphinsNarwhalPorpoisesThe phylogenetic tree consists of:
Lineages → These are the taxonomic companies of hobby located withinside the extremes of the traces referred to as branches.Nodes → These are the ramification points, that are additionally called divergence points. They constitute the area of the maximum latest not unusual place ancestor.Root → This is the older not unusual place ancestor that every one lineages percentage. The first one withinside the tree.- Two or extralineages are extra associated with every difference in the event that the percentage a latest not unusual place ancestor. In this manner, all of them diverge from the equal node.Two or extra lineages are much less associated with every difference in the event that they lack a latest not unusual place, ancestor. This is, the node from which those lineages diverge is located a long way away withinside the tree.
There also are one-of-a-kind phylogenetic relationships among lineages.
• Apomorphies → Occur while the worried lineages percentage a trait that they inherited from their maximum latest not unusual place ancestor. This trait developed for the primary time on this ancestor. → This dating is a homology.
• Plesiomorphies o( while the worried lineages percentage a trait inherited from a not unusual place ancestor, however, this is older regarding the prevailing developments exhibited via way of means of different descendants of the equal not unusual place ancestor. This dating is a homology.
• Homoplasy → Lineages percentage is a trait that developed independently in every group. → This dating is an analogy.
What is the phylogenetic tree?
The phylogenetic tree is the branching diagram showing the evolutionary relationships among various biological species.
Thus it is clear from the above answer.
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what's is pharamacolg
Explanation:
It's a branch of medicine and pharmaceutical sciences concerned with drug or medicine action. Where a drug may be defined as any artificial, natural, or endogenous molecule which exerts a biochemical or physiological effect on a cell, tissue, organ or organism.
Pharamacolog is the branch of medicine concerened with the uses,effects and modes of action of drugs
Burning changes an object's:
Answer:
Look, texture, size, shape
Explanation:
I think that should be the answer but u didn't give me options so I think im right
What molecule is all of this based on?
Answer:
carbon
Life is based on carbon; organic chemistry studies compounds in which carbon is a central element. The properties of carbon make it the backbone of the organic molecules which form living matter. Carbon is a such a versatile element because it can form four covalent bonds.
describe the pathway of water molecules from the soil through a plant and into the atmosphere ?
sience plants absorb carbodieoxide the water molecules that is absorbed by the plant bond with carbondieoxide to form oxygen and release ìt into the atmosphere
What are the closest astronomical bodies to earth?
Answer:
The Moon, Venus and Mars are the planets nearest to the Earth.
Memories about one's own life are called:
self-recall
historical memories
myopic visions
autobiographical memories
How are transitional fossils evidence to support the process of natural selection?(1 point)
A) They show intermediate steps in the evolution process.
B) They show that most species have not changed over long periods of time.
C) They show plants and animals that once existed but do not exist now.
D) They show that every species of animals developed separately.
Answer:
1. Individuals with thicker fur had a survival advantage in the cold...
2. Random mating
3. The green skin color is being selected over blue skin color.
4. DNA.
5. They show intermediate steps in the evolution process.*
6. Different islands had very different food resources available...
7. Those who have traits that help them survive are able to reproduce...
8. It makes them unrecognizable to the immune system
9. The exposure of human populations to less UV light required...
10. The correlation between air pollution and white moth predation
11. It is a biological process that leads a population to have a widespread...
12-16 Essays
Explanation:
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Transitional fossil evidence shows intermediate steps in the evolution process. So, the correct option is A.
What do you mean by Fossil?Fossils may be defined as the preserved remains, or traces of remains, of ancient organisms. They are dead and organic remains of past organisms.
Transitional fossil evidence would show intermediate forms of a species and they changed and accumulated adaptations at a slow pace. These are remnants of an organism that came in the version of the current species.
Therefore, Transitional fossil evidence shows intermediate steps in the evolution process.
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How does competition affects behavior of species
Answer:
The way organisms compete with each other determines species distributions, population dynamics, community structure, food webs, and social dominance hierarchies. ... These stressors affect the way that organisms compete with each other and their ability to survive and co-exist.
Explanation:
