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nikdorinn [45]
3 years ago
7

Dale’s _____ carry instructions from his central nervous system to his muscles.

Biology
1 answer:
Sliva [168]3 years ago
5 0

Dale’s motor neurons carry instructions from his central nervous system to his muscles.

Motor neurons are special brain nerve cells that transmit impulses from the brain or spinal cord to a muscle or gland. The motor neurons functions with a network of other neurons, situated within the spinal cord and the brain. The two main subtypes of the motor neurons are; the upper motor neurons (which comes from the brain and connects with the lower motor neurons), and the lower motor neurons (which localize in the brainstem and the spinal cord).  


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In Drosophila, the bar mutant is characterized by eyes that are restricted to a narrow, vertical bar. When a bar female is mated
Lelechka [254]

Answer:

See the answer below

Explanation:

a) The mode of inheritance of the bar mutant is X-linked and dominant.

Assuming that barness is represented by the allele B.

Bar female = X^BX^B or X^BX^b

Wild type male = X^bY

Bar female x wild type male:

                 X^BX^B    x    X^bY

          X^BX^b   X^BY  X^BX^b    X^BY

All of the F1 flies are bar because a single B allele is required for the trait to be expressed.

Bar male x wildtype female

                            X^BY   x   X^bX^b

                 X^BX^b    X^BX^b   X^bY    X^bY

All the female offspring are barred while all the males are wildtype barred resulting in a 50/50 (857/905 is approximately 50/50) ratio of barred/wildtype offspring.

b) Genotypes of each of the cross above, including the parents and the F1 generations.

1.             X^BX^B    x    X^bY

          X^BX^b   X^BY  X^BX^b    X^BY

2.               X^BY   x   X^bX^b

           X^BX^b    X^BX^b   X^bY    X^bY

                 

4 0
4 years ago
CAM plants lose their _____ during the day and open them at night.
Anni [7]

Answer:

d) stomata

Explanation:

CAM plants lose their stomata during the day and open them at night.

Therefore, CAM plants do not lose thylakoids, chloroplasts, or vascular bundles during the day and open them at night.

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During the light reactions, oxygen (O2) is produced.

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bagirrra123 [75]

Small Annual Plants!

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This is the first stage of nuclear cell division in which centrioles move to opposite ends of the cells and chromosomes, spindle
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Prophase. This is the first stage of nuclear division

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