Why
laboratory rats kept and studied in the exclusion zone?

Answers

Answer 1
They are studied by the scientist so that they can examin them time to time

Related Questions

How do humans use artificial selection to produce organisms with desired traits?


Plz help!

Answers

Answer:

human used artificial selection to develop new organisms with desirable characteristics. Breeders select two parents that have beneficial phenotypic traits to reproduce, yielding offspring with those desired traits

pls help me asap for brainlest :)

Answers

Answer:

The correct answer would be A

Explanation:

The picture shows the PMAT process Prophase occurs first the chromosomes become visible as paired chromatids and the nuclear envelope disappears.

Then the Metaphase. The way you can remeber that s by looking at the first letter which is M. Stands for Midlle. So you can say the chromososmes are in the middle together. Now Anaphase. The way you can remember that is by looking at A meaning Away. You can think of that as the chromosomes being pulled away from each other moving opposite ways. Now last is Telophase. That when they make two nuclei. When they are divided into 2 there are not nucleus anymore but nuclei.

Hope this helps :)

can some one help plsssssssssss

Answers

Answer:

right ventricle, left ventricle, left atrium

Explanation:

have a nice day!!

In many mammals, a developing embryo is nourished through the ____, ____ is a connection with the mother. Later, a newborn takes in food produced by the ____ of the mother. Unlike a young mammal, an insect or amphibian undergoes ____ which is a series of dramatic changes in body shape and form.

PLS HELP!!! I WILL GIVE BRAINLY!!!!

Answers

Answer:

In many mammals, a developing embryo is nourished through the placenta. ____ is a connection with the mother. Later, a newborn takes in food produced by the blood artilleries of the mother. Unlike a young mammal, an insect or amphibian undergoes metamorphosis which is a series of dramatic changes in body shape and form.

In many mammals, the placenta, which connects the mother and the embryo, provides nutrition to the growing embryo. Oxygen and nutrients can be exchanged between the mother and foetus thanks to the placenta.

What is the mode of nourishment of an infant ?

The infant then consumes nourishment made by the mother's milk. This milk, which the mother's mammary glands make, is nutrient- and antibody-rich and aids the infant's growth and development.

An insect or an amphibian goes through metamorphosis, which is a sequence of significant changes in body structure and form, unlike a newborn mammal. The insect or amphibian completely changes during metamorphosis from a larva or tadpole to an adult form the rearrangement of tissues and cells.

The bug or amphibian's adult form can reproduce and is adapted to its environment.  Hormones are what cause this metamorphosis, and it requires.

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Which statement about the immune system is false?
A.White blood cells are made in lymph nodes.
B.Lymphocytes reduce inflammation.
C.B cells remember specific pathogens.
D.Most white blood cells kill bacteria

Answers

Answer:

B- Lymphocytes reduce inflammation, I think

Scientific names are in Latin. Select all that apply

Answers

what are the answer choices?

PLEASE HELP!!
Which of the following is a problem caused by acid rain?
is responsible for smog
damages limestone and marble on statues and buildings
is a CFC that causes destruction of ozone
can cause burning sensation in the eyes and respiratory problems

Answers

Answer:

It damages limestone and marble on buildings and statutes.

Can cause burning sensation in the eyes and respiratory problems.

Explanation:

What are the major physical barriers to using solar cells and modules?​

Answers

Answer:

Per my research, there are no barriers to using solar cells and modules, and that's why solar has been the majority of new power installed for several years now.

Explanation:

This is what I found while researching but if I am incorrect please correct me. Hope this helped somewhat and have a good one!

( ◑‿◑)ɔ┏--┑٩(^◡^ )

Which of the following statements best describes what will mostly likely occur to the mouth populations in the image below?

Answers

Answer:

a. The light moths will be captured by the predators more easily than the dark moths and the population of dark moths will rise.

Explanation:

The light colored moths are more easily seen by the predators and therefore they are captured by them Dark colored moths are not seen by the predators easily because they disappear in the darkness. The population of dark moth will rise eventually because they are not captured by the predators.

Fungi produce spores in structures called fruiting bodies.
•True
•False

Answers

Answer:

True          hope it helped :)

Explanation:

Clifford is an astronomer who studies the movement of stars. What types of tools
does Clifford likely have in his office that help him study the movement of stars?

1) meter sticks and protractors
2) rubber bands and paper clips
3) rulers and measuring tapes
4)telescopes and cameras

Answers

Answer:

4. Telescopes and cameras

Explanation:

The answer to your question is 4

Finally, the old lady crossed the street safely and Juan was able to reach school on time

Answers

Answer:

Ok

Explanation:

Good job to the old lady

And Good job to Juan too for reaching school on time

what are the major functions of dna?

Answers

DNA serves two important cellular functions: It is the genetic material passed from parent to offspring and it serves as the information to direct and regulate the construction of the proteins necessary for the cell to perform all of its functions. Hope this helped! ;)

DNA serves two important cellular functions: It is the genetic material passed from parent to offspring and it serves as the information to direct and regulate the construction of the proteins necessary for the cell to perform all of its functions!!!

ASAP GIVE BRAINLIEST- 100 points after answered

Two species of sea urchins adapted to live side by side on the sandy bottom of the sea floor. The two species appear to have the same diet—drift seaweeds and other bits of organic matter. They are able to adapt and to live in the same environment without competing with each other. How are they able to share habitat and food resources?

Answers

Two species of sea urchins live practically side-by-side in sandy bottoms. The two species appear to have the same diet: drift seaweeds and other bits of organic matter. They can live in the same environment without competing.

As it compels them to live in the same environmental surroundings so the characteristics of living nature also get developed as their current following situation that's helping them to get the same food & habitat.

Both species of sea urchins share the same habitat and food resources by separating their niches a little bit differently from one another.

What do you mean by Habitat?

Habitat may be defined as a type of native environment for which a particular species is best adapted due to natural selection.

Competitive exclusion leads to the elimination of any one species until they do not share different niches.

Therefore, both species of sea urchins share the same habitat and food resources by separating their niches a little bit differently from one another.

To learn more about Niches, refer to the link:

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Which of the following chemical equations is balanced?
A. Al + CuCl2 AIC13+ Cu
B. 2Al + 3CuCl2 - 2AlCl3+ 3CU
C.3Al + 2CuCl2 — 3AlCl3+ 2Cu
D. 4Al + 3CuCl2 -4AlCl3+ 3CU

Answers

The answer is B since the products equal the reactants

What kind of waste is shown in the photograph?
O A. Industrial waste
O B. E-waste
O C. Septic system waste
O D. Radioactive waste

Answers

B)E-waste. E-waste is electronic waste the image shows electronic devices

Answer:

B. E-waste

Explanation:

Above answer is correct :)

PLEASE HELP HURRY
where carbon dioxide is produced or formed in insect’s
(grasshopper) organism?

Answers

Yup. It expels the carbon dioxide. Also please brainliest

How are meiosis and mitosis similar?
O A. They happen at the same time.
B. They both produce new cells.
C. They both produce sex cells.
D. They both produce diploids.

Answers

Answer:

Both creates new cells

Explanation:

Meiosis and mitosis both results in the production of new cells. Therefore, the correct statement is option B.

What is meiosis?

Mitosis and meiosis result in cell division and the production of new cells. In mitosis, two genetically identical daughter cells are formed by a parent cell and are responsible for the asexual reproduction of organisms.

In meiosis, four daughter cells are formed from a single parent cell which is genetically diverse, and each daughter cell receives half the number of chromosomes present in the parent cell. Meiosis is the process by which gametes (sex cells) are produced in organisms, and it is responsible for the sexual reproduction of the organisms.

Therefore, both mitosis and meiosis result in the production of new cells. However, mitosis results in the production of two identical daughter cells, whereas meiosis results in the production of four genetically diverse daughter cells.

Learn more about meiosis here:

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The reproductive cycle shown above involves a virus infecting a cell, replicating the genetic material, building a new capsid and then destroying the cell. This reproductive cycle is called.

a. Lytic Cycle

b. Infection Cycle

c. Duplication

d. Lysogenic Cycle

Answers

Answer:

A. Lytic Cycle

Explanation:

The lytic cycle and lysogenic cycle are reproductive cycles that viruses use. The image attached shows the difference.

Don’t listen to what I’m about to say
It is c

GIVING BRAINLIEST!!!!!
The moon itself doesn’t emit any _____ like the sun. What we see when we see the moon is sunlight ______________________ off the moon.
The __________________ of the moon is how much of the moon appears to us on _____________________ to be lit up by the sun.
__________________ of the moon is always lit up by the sun, except during an ______________________, but we only see a portion that is lit up.
Around once per _________________, the moon __________________ around the Earth.
As the moon circles the Earth, we can only see a portion of the lit up side. When we can see 100% of the lit up side, this is a _______________ moon. When we can’t see any of the lit up side, this is called a _____________________ moon or ___________________ moon.
What are the different phases of the moon?
As the moon orbits or circles the Earth, the phase _________________________.


What is the phase called where we can’t see any of the lit up side of the moon?
_________________________________________________________ _________________________________________________________
Starting with the New Moon, list the phases of the moon.
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________
____________________________________________________ Waxing or Waning?
As the New moon begins its orbit and we see more and more of the moon, this is called _________________________________.

After the moon gets to its Full phase, we start to see less and less of the moon. This is called ____________________________.

Answers

Answer:

I just answered a question like this lol sorry I didn't see this faster!!

GIVING BRAINLIEST!!!!!

The moon itself doesn’t emit any light like the sun. What we see when we see the moon is sunlight off the moon.

The __________________ of the moon is how much of the moon appears to us on _____________________ to be lit up by the sun.__________________ of the moon is always lit up by the sun, except during an ______________________, but we only see a portion that is lit up.Around once per _________________, the moon __________________ around the Earth.

As the moon circles the Earth, we can only see a portion of the lit up side. When we can see 100% of the lit up side, this is a Full moon. When we can’t see any of the lit up side, this is called a dark moon or new moon.

What are the different phases of the moon?

As the moon orbits or circles the Earth, the phase changes.

What is the phase called where we can’t see any of the lit up side of the moon?

New Moon.

Starting with the New Moon, list the phases of the moon.

New Moon.

Waxing Crescent.

First Quarter.

Waxing Gibbous.

Full.

Waning Gibbous.

Third Quarter.

Waning Crescent.Waxing or Waning?

As the New moon begins its orbit and we see more and more of the moon, this is called waxing/waning.

After the moon gets to its Full phase, we start to see less and less of the moon. This is called waning.

Explanation:

The ones in italic big bold I didn't get. The rest I ( in smaller bold writing) did. So still more than half! Hope this helped and have a wonderful day! :)

"You were born to be real, not perfect.."

<33

Use the words, DNA, chromosome, and gene in a sentence.

Answers

Answer:

A nucleus is the membrane-bound organelle, and it has the chromosomes, and genes are made up from DNA.

Explanation:

hope this helps have a great day!!! -KindnessMatters-

No decorrer das semanas, a lua apresenta diferentes aspectos. A causa para essas mudanças na aparência do satélite da terra é: A) a sombra da terra refletida sobre a lua. B) o movimento de rotação da lua em torno do seu próprio eixo. C) os raios solares que incidem na superfície da lua. D) a translação da lua ao redor da terra.

Answers

Answer:

C) the sun's rays that fall on the moon's surface.

Explanation:

The moon has different aspects and appearance because of the sun's rays that fall on the moon's surface. The shape of the Moon does not change itself, it occurs due to the sunlight. We only see that part of moon which is lit by the Sun. The phases of moon occur because the Sun lit different parts of the moon when the Moon revolves around the Earth so we can say that sun rays are responsible for the changing of shapes of the moon.

What is the difference between between pulmonary artery and pulmonary vein? (I will mark you as brainleist) ​

Answers

The pulmonary veins transport oxygenated blood back to the heart from the lungs, while the pulmonary arteries move deoxygenated blood from the heart to the lungs.)

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The immune response works much like a team with different players playing their role for a common goal: to rid the body of a pathogen.
Create an analogy that helps explain the roles of the specific and nonspecific responses of the immune system and describe the relationship between the two responses

Answers

Answer:

In a primary immune response, naive B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.

A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response

Answer:

In a primary immune response, naïve B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.

A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response.

   

Please help me and no file
Is it accurate to say that
having the BRCA-1 gene gives someone cancer? Explain your thinking.

Answers

Answer:

On average, women with an altered BRCA1 gene have a 50 to 85 percent risk of developing breast cancer by age 70. Their risk of developing ovarian cancer is 40 to 60 percent by age 85. A woman with cancer in one breast has a higher risk of developing cancer in the other breast.

Can someone please help me??

There is an amusement park based on sea life. Its purpose is to get the public interested and caring about conservation of the world’s oceans. Some of the profits from this organization go toward funding ocean research and conservation. In order to get people interested, some of the shows that the park offers include large marine mammals that do tricks. Some of the larger marine animals are housed in pools for viewing instead of being allowed to live in their natural habitat. They also have rare and endangered species on display to help increase awareness of them. They even have a breeding program for the some of the endangered animals.

Describe an ethical concern that would be related to this park.

Answers

Answer:

The animals may rely on humans for care instead of doing it themselves

Explanation:

Think about it, if the animals there don't have all the resources they need in a tank instead of the ocean. So they need the workers there to care for them. This can be bad for the animals because if they can go back to the ocean, they won't be able to get the resources they need by themselves!

Hope this helps and don't forget to follow!

Which of these allows you to distinguish between scents?
a- chemoreceptors on the tongue
b- chemoreceptors in the nose
c- photoreceptors in the eye
d- mechanoreceptors in the ear

Answers

Answer:

B) chemoreceptors in the nose

Explanation:

Chemo receptors in the nose helps to distinguish between scents where the smell can be differentiated from each other by chemo receptors. The correct answer is option B.

What helps in taste in tongue ?

Tongue helps in the tasting via the help of taste buds which are recognized and interpretation of various taste.

The nasal cavity of nose is made up of many chemo receptors where the names of the receptors are :

olfactory

vomeronasal

and trigeminal systems.

The presence of chemoreceptors in the nasal cavity is in the anterior respiratory epithelium of the nasal cavity.

Olfactory receptors that are abstractly found in the nasal cavity that is responsible for the interpretation of smell. It is the protein that is capable of binding to the odour molecules.

Learn more about chemo receptors at :

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PLEASE HELP I WILL MARK BRAINALISTTTT

Answers

Answer:

B

Explanation:

Something tells me the answer is “C” or “B”

Which of the following statements about peer pressure is NOT accurate?
A. Peer pressure is influence from people within the same age group.
B.
Peer pressure can only be negative.
C.
Peer pressure can be active
D
Peer pressure can be passive.

Answers

Answer:

B. Peer pressure can only be negative.

Explanation:

Hi! The answer to your question is B because peer pressure is not only negative, it can result in some positive things! Please mark me as brainliest!

I hope that this helps and I hope you have a nice day!

Answer:

I think it's B

Explanation:

You can peer pressure your friend to ask out his crush which can lead to good things.

Which of the following is the newest and most accurate form of evidence for common ancestry

DNA molecular

Fossils

Answers

I believe DNA molecular
Other Questions
Why are halogens unreactive? A. *Halogens need one to two more electrons to fill their outer shell.B. Halogens need three to four more electrons to fill their outer shell.C. D. Halogens have a full outer shell of valence electrons. What are some setbacks HoChi Minh had to face? Mandy's dog will be having four puppies. Mandy performsa simulation by tossing a coin to model whether thesepuppies will be male or female. Let heads (H) = female puppy Let tails (T) = male puppyThe results of the simulation are:1. THTT6. HHHH2. TTTH7.HTHT3. TTHH 8. HHHT4. HTTT9. THTH5. TTTT10. HHHHWhat is the estimated probability that at least two of the puppies will befemale?A. ) = 70%B. 6 = 60%30%D.50% Sally is making asquare quilt with 49squares and each square is4 inches. What is thelength of the quilt? Suppose that appoximately 261,000,000 people live in the united states. Of these people 37,600,000 speak a language other than english at home who speak another lanague at home over 45 percent speak spanish 3. Lines 27-29: What comparison is in these lines? How does this comparison affect the tone or feeling in the story? (The story is Marigolds by Eugenia Collier) A bus averages 2miles per hour faster than a motorcycle. If the bus travels 165miles in the same time it takes the motorcycle to travel 155miles, then what is the speed of each? Project L costs $45,000, its expected cash inflows are $11,000 per year for 8 years, and its WACC is 8%. What is the project's discounted payback What is the formula for volume? (Select all that apply) *v=Lwh (volume = length x width x height)V = Lw (volume = length x width)V = Bh (volume = base x height)V=L+W+L+W (length + width + length + width) No links, no I dont knows, math home work review sheet 2please atleast try to awnser 2-3 Select the correct answer.What important fact about the wounded soldiers is reflected by the repetition of the bolded sentences in the excerpts from "InAnother Country" by Ernest Hemingway?O A. It establishes the irony that, although the wounded soldiers have physically left the warfront, thewarcontinues to haunt them psychologically.O B. It shows the gradual loss of hope and growing depression of the wounded soldiers and their need fordistractions.O C. It establishes the wounded soldiers' determination to shun war anddisobey military commands to return tothe front after they recover.O D. It shows the wounded soldiers' sadness and disappointment at the lack of gratitude from the people theyrisked their lives to protect.O E. It shows the wounded soldiers' belief that the war would never end, even as thousands of soldiers were killedor wounded and sent to hospitals. Name three commonalities that exist amongst Hindu and Buddhist states that existedin South and Southeast Asia. what is the third step taken when checking a students reading rate? .The cell membrane acts like a filter allowing necessary materials in and waste out, while keeping the organelles and cytoplasm in. This means that a cell membrane is selectively A sports team is holding a banquet. The total cost of supplies for the banquet event is $1000. The cost per ticket is set so that 100 tickets will cover the cost of the banquet event.Based on this information, what is the cost of ONE ticket?One ticket for this banquet costs $ Approximately 52 percent of all recent births were boys. In a simple random sample of 100 recent births, 49 were boys and 51 were girls. The most likely explanation for the difference between the observed results and the expected results in this case is (PLZ HELP!!!) The largest number of individuals of a species that an area can support is the A) population size B) carrying capacity C) limiting factor D) population growth Snails are invertebrates that have a soft body that they can pull into a hard outer shell. They also have a muscular foot that allows them to move. Snails inhabit land as well as the ocean. Some snails breathe using lungs, whereas others breathe with gills. Snails are classified as _______. Question 6 options: segmented worms mollusks echinoderms arthropods A tent originally cost $90 and is on sale for 60 % off . find the equation of the line m= -4 and contains the point (3,6)