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fredd [130]
3 years ago
10

Why do black redstarts exhibit migratory restlessness at night for fewer days than common redstarts?

Biology
2 answers:
IgorLugansk [536]3 years ago
3 0

Answer:

The statistics given has shown that night-migrating birds are driven by autonomous circadian clocks which is made possible  by sunset cues. This timekeeping that is the autonomous circadian clocks system is probably the key factor in the overall control of nocturnal songbird migration.

liq [111]3 years ago
3 0

Answer: Blact redstarts are associated with circadian clock. Seasonal melatonin and circadian clock lead to migratory nocturnal restlessness. The birds that exhibit migratory restlessness at night is due to high levels of melatonin at nights because melatonin are high in the night.

Explanation:

Migratory restlessness is the locomotive performance that birds engaged in before migration. It is common in birds with circadian rhythm.

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During an interphase lasting 23 hours the S stage takes average 8.0 hours.What is the percentage of interphase is taken up by S
Alik [6]

The right answer is 34.78%

The interphase is the period of the cell cycle that the cell transcribes its genes and the chromosomes are duplicated. It can be subdivided into several phases:

* phase G1

* phase S: during which the chromosomal material is doubled by DNA replication. This is called chromosome duplication.

* phase G2.

Phase G1 is the longest phase of the interphase (its duration depends on the type of cell), followed by phase S, then phase G2.

To calculate the proportion of phase S in the interphase simply make the division:

phase duration S / interphase duration = 8/23 = 0.3478 (in percentage that is 34.78% (0.3478*100)).

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3 years ago
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During metabolism, the complete breakdown of one molecule of glucose results in a maximum yield of 38 molecules of
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Biology textbooks often state that 38<span> ATP </span>molecules<span> can be made per oxidised</span>glucose molecule during<span> cellular respiration (2 from glycolysis, 2 from the Krebs cycle, and about 34 from the electron transport system).</span>
8 0
4 years ago
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Place the four images from the cell cycle in the correct chronological order.
vladimir1956 [14]

Answer:

C, B, A, D

Explanation:

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3 years ago
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