BIOLOGY HIGH SCHOOL

Most land mammals have the ability to rest one hemisphere of their brains at a time. Please select the best answer from the choices provideda. True
b. False

Answers

Answer 1
Answer:

Answer: b. False

Many mammals rests for a large proportion of the 24 hour. The rest period usually extent during hibernation. The marine mammals tend to rest or sleep with only one hemisphere is kept at rest. It allows them to keep one eye open this allows them to stay alert against the predators. But the terrestrial or land mammals when take rest both the hemispheres of the brain sleep.

On the basis of the above description, most land mammals have the ability to rest one hemisphere of their brains at a time is false.
Answer 2
Answer: The answer is false, I just took the quiz

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Ddt was banned from use as a pesticide in the united states becausea. it caused the eggs of fish-eating birds to become thin and fragile.
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d. all of the above. please select the best answer from the choices provided a b c d

Answers

The answer to your question should be D. all of the above
The answer is D. All of the above . Hope this helps!

A codon is made up ofA. a two-nucleotide sequence.
B. a three-nucleotide sequence.
C. a four-nucleotide sequence.
D. a five-nucleotide sequence.

Answers

A three nucleotide sequence. On mRNA, once it enters the ribosomes codons, ie AGU (adenine, guanine and uracil) is a codon, and is then paired with an anticodon of complementary bases which create a link of amino acids to create a protein.
The first path is fromthe nucleus. DNA from the nucleus, assigns specific job for the organelles tofollow through mRNA. The mRNA goes out from the nucleus and enters thecytoplasm where ribosomes will attach to the mRNA. The ribosome-mRNAcombination binds to the endoplasmic reticulum and signals the tRNA to translatethe message from DNA. The rRNA contains codons that will be used for the translationof the messages by the tRNA. These codons has a three – nucleotide sequence. Avesicle that contains the enzyme grows out from the endoplasmc reticulum anstransport the enzyme to the Golgi body for further processing. The answer isletter B.

A 38-kilogram child roller skates on a circular track with a radius of 24 m. Her velocity is 6.0 m/s. What centripetal force does she experience?-0.16 N
-0.38 N
-57 N
-580 N

Answers

The answer is.57N.


Centripetal force (F) is a force that makes a body move around a circular curve. The unit of force is N (N = kg * m/s²).

It can be represented as:

F = (m* v^(2) )/(r)


where:
m - mass
v - velocity
r - radius of the curve

We have:
m = 38 kg
v = 6 m/s
r = 24 m

We need centripetal force:
N = ?


If:

F = (m* v^(2) )/(r)

Then:

F = (38 kg* (6 m/s)^(2) )/(24 m)

F = (38* 36 )/(24)kg*m/s^(2)

F = 57N


Therefore, centripetal force child experiences during skating on 

a circular track is 57 N.

In order to solve the problem presented above you will simply need to use the formula shown below. Please see attachment. Now all we have to do is simply replace the variables with the information that the problem gives us. If we do that we will get the following:


F = m*v²/r

F = 38*6²/r

F = 38*36/24

F = 57 Newtons


I hope it helps, Regards.

What is the function of chlorophyll a?

Answers

Answer:

photosynthesis

Explanation:

Chlorophyll a absorbs the wavelengths of violet-blue and orange-red light and functions as a primary electron donor during the election transport chain in photosynthesis. It also functions in transporting energy to the reaction center where P680 and P700 are located.
This is just so it can make the plants green

The four main parts of a flower are the _____. pistil stamen receptacle inflorescence sepal petal xylem phloem

Answers

Answer: The correct answer for the blank is -

Sepal, petal, stamen, and pistil.

Flower is the reproductive structure of flowering plants (angisperms). It is primarily composed of four parts, which are (from outside to innerside) -

Sepals (that together form  calyx, the outermost protective whorl)

Petals (that together form corolla, the second whorl)

Stamen (the male reproductive part that together forms androecium, which is the male reproductive organ).

Stamen is further composed of anther (that produces pollen) and filament (stalk like structure, which protects anther).

Pistil (the innermost part that forms gynoecium, which is the female reproductive organ). It is composed of stigma, style, and ovary.

They would be the pistil, stamen, receptacle, and petal.

Which of the following will occasionally produce a duplicate gene?A) Chromosome replication during mitosis
B) Crossing-over during meiosis
C) Neutral mutation during transcription
D) Genetic drift during reproduction

Answers

Homologous chromosomes exchange DNA during meiosis in a process called crossing-over. Crossing-over sometimes involves an unequal swapping of DNA. Basically one chromosome in the pair gets extra DNA.

b/Crossing-over during meiosis
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