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Scilla [17]
2 years ago
10

In which environment would someone most likely find a living protist?

Biology
2 answers:
lawyer [7]2 years ago
7 0
A is you answer hope I helped :)
Natasha2012 [34]2 years ago
6 0

A) on the outer layer of human skin

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Hank Greene, an airline pilot, is having difficulty with the sleep-wakefulness portions of his circadian cycle. The pineal gland
d1i1m1o1n [39]

Answer:

Melatonin

Explanation:

  • Melatonin is the hormone that is produced by the pineal gland in response to the dark and light cycle.
  • The pineal gland is turned on when there is darkness and turned off when there is light.
  • When it's dark, the pineal gland becomes active and produces melatonin leading to an increase in the melatonin levels in the blood and a person starts to feel more sleepy and the levels of melatonin remain in the blood for about 12 hours after which they fall and the state of wakefulness occurs.
  • The levels of melatonin fall sharply in the presence of bright light.
  • Thus, the melatonin hormone is responsible for controlling the sleep-wake cycle.
7 0
2 years ago
A student models moon phases. She holds a foam ball on a stick in front of her body and then stands in front of a light as shown
mr Goodwill [35]

Answer:

D

Explanation:

i took the test

3 0
2 years ago
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Why is it necessary to "starve" the donor cells prior to reproductive cloning? to force the enucleated egg cell into g0 stage so
kiruha [24]
<span>To force the cells into G0 stage so that the nuclei removed from them will respond to the cytoplasmic growth signals. </span>
5 0
2 years ago
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Calculate how long it will take for one full base pair mutation to occur. Explain your reasoning with by constructing a mathemat
scoray [572]

Answer:

Since the gene mutates at a rate of 0.76 base pairs every 17.1 million years, to find out the time it would take for 1 base pair to mutate can be calculated by dividing 17.1 million years by 0.76

17,100,000 ÷ 0.76 = 22.5 million years

The following equation can be used to describe this:

μ = [(r2/N2) − (r1/N1)] × ln (N2/N1) = (f1 − f2) × ln (N2/N1)

r1 = the observed number of mutants at time point 1

r2 = the observed number of mutants at the next time point

N1 and N2 are the numbers of cells at time points 1 and 2

Hope that answers the question, have a great day!

5 0
2 years ago
Leonard designed a parallel circuit to light two lightbulbs. But his circuit doesn’t work. Which two items in the circuit must b
tamaranim1 [39]

In a parallel circuit, the voltage across each of the components is the same, and the total current is the sum of the currents through each component.

If two or more components are connected in parallel they have the same potential difference ( voltage) across their ends. The potential differences across the components are the same in magnitude, and they also have identical polarities. The same voltage is applicable to all circuit components connected in parallel.

If each bulb is wired to the battery in a separate loop, the bulbs are said to be in parallel.


8 0
2 years ago
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