Answers
1) According to the diagram, divergence among mammals took place about 75 mya.
2) Scientists are able to determine common ancestors by studying molecular data.
3) Darwin's theory of evolution by natural selection states that animals change over long periods of time.
4) Scientists are closesly studing how genes reorganize themselves.
5) Some scientists, however, think new species evolve quickly.
6) Still, among scientists, the principles of natural selection remain unchanged and highlight how animals evolve.
7) The main tool for the study of evolution is careful observation of fossils and the anatomy of animals.
8) Scientists also study animal embryology.
9) What no one doubts is the wide diversity among organisms on Earth.
10) The divergence that took place among mammals helps us understand why whales and dolphins are mammals and not fish.
Fun fact: Uh, I happen to discover a whole packet of answer keys, not just for this but also for other assignments and stuff. (O.O)
Related Questions
WHAT IS THE POWERHOUSE OF THE CELL?
this is for a friend who answered correctly previously. please just don't put anything funny and let them answer it pleaseeeee.
Answers
Explanation:
mitochondria are often referred to as the powerhouse of the cell
what is meanustration pariod
Answers
Answer:
menstration period is when a woman's body releases tissue it no longer needs so then the girl bleeds (usually for 7 days) and then every month or so (different for all girls) the uterus lining gets thicker to prepare for a fertilized egg if the woman becomes pregnant. :)
describe a specific exmaple of postive action that reduce human imapct on land?
Answers
Answer:
Human activities contribute to climate change by causing changes in Earth’s atmosphere in the amounts of greenhouse gases, aerosols (small particles), and cloudiness. The largest known contribution comes from the burning of fossil fuels, which releases carbon dioxide gas to the atmosphere. Greenhouse gases and aerosols affect climate by altering incoming solar radiation and out-going infrared (thermal) radiation that are part of Earth’s energy balance. Changing the atmospheric abundance or properties of these gases and particles can lead to a warming or cooling of the climate system. Since the start of the industrial era (about 1750), the overall effect of human activities on climate has been a warming influence. The human impact on climate during this era greatly exceeds that due to known changes in natural processes, such as solar changes and volcanic eruptions.
Question 9 of 17
Water molecules break down during cellular respiration
O True
O False
Answers
During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water.
PLEASE HELPPP ASAP> NO LINK OR UNRELATED ANSWERS
The Human Body in Space
NASA monitors the bodies of animals and humans to see how they react to extended periods in space. When the body is in space, it no longer has the strong pull of Earth’s gravity on it. Because the body’s systems normally function in the presence of gravity, NASA has been studying the effects of weightlessness on the body.
Weightlessness Takes a Toll
On Earth, the heart naturally pumps blood more forcefully to the upper body than to the lower body, where gravity helps the blood flow down. In space, the heart continues to pump the blood more forcefully to the upper body, but the balancing force of gravity does not pull the blood to the lower body. This uneven blood flow causes astronauts’ faces to become puffy and their lower bodies to become thin.
The shape of the spine also changes in space. Without the force of gravity pushing the vertebrae closer together, the spine stretches out and causes pain in some cases.
Another system affected in space is the body’s balancing system. To balance itself, the brain acquires information from the eyes, muscles and tendons, and a set of sensors (called the vestibular apparatus) in the inner ear. In space, the only balancing information that can be relied on enters through the eyes, so astronauts have difficulty moving around.
The most serious problem for astronauts, however, is bone loss. In space, the bones lose minerals, such as calcium, potassium, and sodium. The bone loss in the legs can be as high as ten percent, and even exercise does not completely solve the problem.
Laboratory in Space
With the completion of the International Space Station (ISS), NASA will be able to study some of the effects of long-term exposure to weightlessness. NASA also plans to expand its studies to better understand how the immune system is affected and how radiation, which is much greater in space,
affects humans. Radiation can pose serious health threats, including cancer and neurological damage.
Because people working together on the ISS will be in small spaces for long periods of time, NASA also plans to study how working in confined spaces affects astronauts’ personalities.
Infer What does NASA expect to gain by studying the effects of long-term space travel on the human body?
Answers
Answer:
Knowledge gained during the early years of human spaceflight indicated an adaptation to the new environment. While the empirical evidence was limited, the biomedical data indicated that microgravity alters the musculoskeletal, cardiovascular, and neurosensory systems.
Explain the function of enzymes and how enzymes
can be denatured.
Answers
Answer:
They speed up chemical reactions and are denatured by high temperatures and high pH.
Explanation:
Enzymes speed up chemical reactions. They have specifc conditions that allow them to work effectively. Temperature and pH affects how enzymes work. The optimum temperature is the temperature at which enzymes will function best. In most instances they are around 37-40°C (in the human body). Temperatures above this will denatured (destroy) the enzymes therefore they cannot do their task. At Temperatures below the optimum temperature the enzymes activity is decreased to the point where they may not be active.
Optimum pH is the pH at which the enzymes works best. These vary based on the type of enzyme. Any pH above the optimum will denatured the enzymes (destroy). pH below the optimum will decrease the ezymes activity to the point where they may not be active
To measure motion, you must be able to compare it to a ________ point, or a non moving point.
Answers
Answer:
To measure motion, you must be able to compare it to a reference point, or a non moving point.
match the following structures on the diagram.
im confused on this some how.
Answers
Answer:
A-chromatin B-chromosome c-chromatic d-nuclear membrane e-spindle f-centriole
What is the main difference between primary succession and secondary succession?
Answers
Answer:
Primary succession in the first initial establishment of an ecosystem on a new layer of terrain (usually rock), whereas secondary succession is a re-establishment of an ecosystem OR simply any establishment of an ecosystem on a rock which was previously inhabited.
Explanation:
Primary succession is the very first establishment of an ecosystem on a new layer of terrain (usually rock) which was previously uninhabited by living organisms. Secondary succession can be thought of as a re-establishment of ecosystems on a terrain/rock which was previously inhabited but is no longer due to an ecological or environmental disruption.
Hope this helped!
Answer:
Primary succession is the progress of plants growing on bare lands, like a bulldozed area, a landslide, or even a solid rock. (Or a volcano.)
On the rock, lichens start, make a little soil, mosses start in the soil, make a little more, Spikemoss (a vascular plant) starts, traps and makes more soil, making a place for dry land plants, which trap and make more soil, eventually, after a very long time, giving rise to a mature forest over rock. The only way to tell that rock is the substrate is the forest composition
Secondary is from a place that has had a forest, and is either burned, farmed, or cut. Plants start very quickly from seeds, roots, tubers, and reforestation can take as little as 20 years, and maturity as little as 75.
Explanation:
Hope this helps
A scientific study demonstrated that rat mothering behavior impacts the stress response in their pups. Rats that were born and grew up with attentive mothers showed low activation of stress-response genes later in life, while rats with inattentive mothers had high activation of stress-response genes in the same situation. An additional study that swapped the pups at birth (i.e., rats born to inattentive mothers grew up with attentive mothers and vice versa) showed the same positive effect of attentive mothering. How do genetics and/or epigenetics explain the results of this study
Answers
Answer and Explanation:
Regarding genetics, the results of the study show that the mother's genetic material does not influence the behavior of rats in times of stress or in the biological responses of rats to these stressful moments. This is because the mice inherited their mothers' genes, but did not show the same results in a stressful situation when they were raised with different mothers.
Regarding epigenetics, however, we can see that the mothers' behavior in relation to the care of rats managed to provoke epigenetic changes that prevented or stimulated the expression of genes linked to stress, in these rats. The rats that were raised with attentive mothers showed a low expression of stress-linked genes, regardless of the biological mother they had. In addition, it is possible to notice that this modification is permanent, since the rats presented this same type of response throughout their lives.
Two atoms have the same number of protons but different numbers of neutrons. These atoms are:
A. electrons
B. isotopes
C. molecules
D. radiation
tysm!
Answers
Answer:
Isotopes
Explanation:
If two atoms have different numbers of protons, they are different elements. However, if two atoms have the same number of protons, but different numbers of neutrons we refer to them as isotopes. Two terms we use to identify nuclides (isotopes) are atomic number and mass number.
4. In transcription, how come the whole DNA molecule is not copied into mRNA?
Answers
Answer:
Although the mRNA contains the same information, it is not an identical copy of the DNA segment, because its sequence is complementary to the DNA template. Transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors.
Explanation:
DNA is transcribed into mRNA and this mRNA has the complementary sequence of DNA but is not identical to DNA.
What is transcription?The mechanism for transferring genetic information becomes more complicated if both strands of DNA serve as transcriptional templates.
If both strands of DNA serve as transcriptional templates, dsRNA would be produced, preventing the synthesis of proteins.
Because its sequence is complementary to the DNA template, the mRNA is not an exact replica of the DNA segment even though it includes the same information.
Therefore due to complementary not identical sequences of mRNA during transcription whole DNA molecule is not copied to mRNA.
Learn more about transcription, here:
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The evolutionary pathways of five species are represented in the diagram below.
Present
{
Past
Whích statement is best supported by the diagram?
А.
Species T and Species U are related to species X
B. Species X evolved later than Species U but before Species s.
С.
Species T is the ancestor of Species S.
D
Species U and V evolved from Species S.
Answers
Answer:
4
Explanation:
The statement that is best supported by the image is that species T and species U are related to species X.
What is evolution?Is the gradual development of new forms of organisms from their ancestral forms.
In the image, X is the ancestor of T, U, V, and S. Thus T, U, V, and S are related by common ancestry.
Thus, it is correct to say that T and U are related to species X.
However, it is incorrect to say that X evolved later or species U and V evolved from S.
More on evolution can be found here: https://brainly.com/question/13492988
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Please help will mark brainlest
What is located at both of the poles on Earth
Answers
Answer: The North Pole lies in the Arctic Ocean while the South Pole is in Antarctica.
Which of the following is a part of a land-based carbon cycle?
Answers
What are your answer choices?
Sustainable development and land use planning are most concerned with _______.
Answers
Answer:
improving long term city health
PLZ HELP IF RIGHT I WILL GIVE U BRAINLIST!!
Due IN 10 MINS!!!
Answers
Answer:
Hey! New magazine out now! :)
Explanation:
Which of these is an example of a trace fossil?
A
skin
B
dung
С
a leaf
D
a skull
Answers
Which is an example of communities ( in terms of biology )
A. 10 white-tailed deer
B. 2 blue jays, 3 northern cardinals, and 1 house sparrow eating seeds
C. 1 snapping turtle on a rock; 2 snapping turtles near the edge of a pond
D. 6 bullfrogs in a pond; 30 bullfrog tadpoles hatching from eggs
Answers
Answer:
B
Explanation:
A biological community is defined as a group of different species which interact with each other within the same environment.
Of the choices, only option B mentions more than one species (Blue Jay, Northern Cardinal and House Sparrow) and they all seem to be in the same environment interacting (all eating seeds).
Therefore option B is correct.
Hope this helped!
Answer:
B. 2 blue jays, 3 northern cardinals, and 1 house sparrow eating seeds
Explanation:
Hope you have a great day :)
Name 4 systems that perform the process nutrient absorption
Answers
Answer:
The digestive system does that know just search up what is in the digestive system in gogle
Explanation:
Drag the tiles to the boxes to form correct pairs.
Match the causes with their effects.
injecting fracking fluids
into the ground
oil spills during transport
on a ship
deforestation
destroys animal habitats and
causes topsoil to erode
pollutes groundwater with
dangerous chemicals
harms aquatic creatures
and vegetation
Answers
It destroys animal habitats and causes topsoil to erode- deforestation 2) pollutes groundwater with dangerous chemicals- injecting fracking fluids into the ground 3) harms aquatic creatures and vegetation- oil spills during transport on a ship.
What is fracking fluids?In order to enhance the amount of hydrocarbons that may be extracted, drilling operations use fracking fluid (also known as frac fluid). The fluid stops the well from corroding. Among other things, it prevents blockages, bacteria from growing, and lubricates the extraction process.
In summary, the chemical composition varies from well to well and is complicated. Depending on the exposure amount, several of these substances can be dangerous to human health.
According to estimates from the oil and gas sector, chemical additives only make up about 1%.
Therefore, It destroys animal habitats and causes topsoil to erode- deforestation 2) pollutes groundwater with dangerous chemicals- injecting fracking fluids into the ground 3) harms aquatic creatures and vegetation- oil spills during transport on a ship.
To learn more about fracking fluids, refer to the link:
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Answer:
injecting fracking fluids into the ground - pollutes groundwater with dangerous chemicals
oil spills during transport on a ship - harms aquatic creatures and vegetation
deforestation - destroys animal habitats and causes topsoil to erode
Explanation:
Plato
What four legged relative of snakes was used to compare genomes?
Answers
Answer:
Lizards / Reptiles
(Scientific four-legged snake is: Tetrapodophis)
Explanation:
couldn't add answer ^^ ignore comment :-)
What comes next in a super giant's life cycle?
Answers
(PLESE HELP) If you exert a force of 500 N to walk 4 m up a flight of stairs in 5 s, how much power do you
use? (INCLUDE THE UNIT for power!)
Answers
Answer:
LETSS GOOOOOOOOOO
Explanation:
Answer:
Solution given:
Force [F]=500N
distance [d]=4m
time [t]=5s
Now
power =F× velocity
=F×d/t=500×4/5=400 watt
The main function of photosynthesis is to produce food plan however some thing else happens during photosynthesis that supports animals life which part of the illustration shows the part of photosynthesis that is essential to animals but not related to food
Answers
A(n)\ an space that presents the right conditions for an individual, population or species to liveit can be as big as the Atlantic Ocean for some species of fish , or as small as a pond where a species of bacteria lives 1.environment
2.biome
3.ecosystem
4.habitat
Answers
Answer:
The correct answer is - habitat
Explanation:
A habitat is a geological area or a particular area with specific conditions suitable for an individual species or population to live there. Habitat can be larger as Atlantic ocean or small as a pond for fishes or and other organisms. Habiate is like address of an organism.
what is the other name of iron oxide
Answers
Answer:
Iron(III) oxide or ferric oxide
Explanation:
which is it?
a , b, c, or d?
Answers
[tex]what \: is \: the \: economic \: importance[/tex]
[tex]of \: bacteria \: in \: agriculture \: [/tex]
??????
If u know the answer write down no links( I will report them )
Answers
The atmosphere: protects the earth from harmful radiation is made mostly of nitrogen traps heat from the sun can be used to transmit radio signals is important in the water cycle
Answers
Answer:
is this a true or false question?