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puteri [66]
3 years ago
14

You want to artificially increase function of the dopamine system in one or more regions of the rat brain. Which of the followin

g methods would be LEAST effective at accomplishing this in rats?
Select one:

a.
Optogenetics


b.
A dopamine agonist delivered via intraperitoneal injection

c.
6-hydroxydopamine injection directly into the brain


d.
Putting L-DOPA in the rats' diet


e.
A dopamine agonist delivered via intravenous injection
Biology
1 answer:
Alenkasestr [34]3 years ago
6 0

Answer:A

Explanation:it sounds right

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Determine whether each statement describes mitosis, melosis, or both mitosis and melosis.
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Answer:

This question is incomplete as it lacks statements, the statements and the answers are as follows:

occurs in organisms that sexually reproduce - MEIOSIS

occurs during growth and development - MITOSIS

the DNA is replicated - MITOSIS AND MEIOSIS

occurs in all organisms - MITOSIS

the number of chromosomes remains the same - MITOSIS

the number of chromosomes reduces by half - MEIOSIS

Explanation:

Meiosis and mitosis are both types of cellular divisions that occur in living cells. Mitosis involves the formation of two (2) daughter cells that are genetically identical to the parent cell while meiosis involves the formation of four (4) daughter cells that are genetically different from the parent cell.

The following are characteristics of the two division processes based on this question:

MITOSIS:

- It occurs during growth and development of an organism.

- it involves DNA replication

- it occurs in all organisms since every living organism undergoes growth and development.

- the number of chromosomes after mitosis remains the same in the daughter cell i.e. 2n remains 2n

MEIOSIS:

- It occurs only in organisms that sexually reproduce.

- it also involves the replication of DNA

- The number of chromosomes in the daughter cells is reduced by half i.e. 2n to n.

8 0
3 years ago
DNA is know as the molecule of life because it
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Often referred to as the molecule of life, DNA (deoxyribonucleic acid) is found in almost all living things. It acts as a type of chemical code that contains instructions, known as genes, for how the body and all its different parts grow, develop, function, and maintain themselves.

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2 years ago
The mitochondrion, like the nucleus, has two or more membrane layers. How is the innermost of these layers different from that o
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Answer:

The double membrane of the mitochondria is highly folded,and therefore wider when unfolded than that of the nucleus.This is an adaptive feature  to increase the surface area for reactions (electrochemical  gradient) by accommodating protons pumped into it by the proton motive force(PMF)  from the matrix to set up the electrochemical gradients needed to generate the energy needed by ATPase synthase enzymes for ATPs synthesis.

Required number of protons needed to be accommodated by the double membrane to generate enough energy for ATPase synthesis,therefore larger surface area is needed.

Explanation:

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Use kepler's third law to find the collapse time, assuming the star has the same mass as the sun.
kap26 [50]
Thank you for posting your question here at brainly. Below is the solution for the above problem. I hope it helps. 

period of orbit at 26000 AU 
<span>P = a^(3/2) </span>
<span>= (26000)^(3/2) = 4,192,374 years (Earth)</span>
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