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grin007 [14]
3 years ago
10

What feature of the fossil Pikaia led scientists to classify it as a chordate?

Biology
1 answer:
Kaylis [27]3 years ago
4 0
Chordates are called chordates because they have a spinal chord, so the answer is C.
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if the southern latitudes get more sun exposure for longer hours per day than Northern latitudes predict the effects on the anim
kumpel [21]

Answer:

Date and latitude interact to determine photoperiod, the daily period of daylight. This interaction has important implications for latitudinal migrants for whom daylight may be a resource or for whom photoperiod regulates annual transitions in life‐history stages (i.e. birds).

Using an established formula, we developed user‐interactive, animated models that enable the visualization of how latitude and date determine photoperiod for latitudinal migrants. We also calculated the photoperiodic schedules for a broad range of hypothetical migratory programmes and real migratory programmes newly available through the proliferation of citizen‐science data. This enabled us to infer the limitations some migratory programmes place on mechanisms for photoperiodic regulation of annual breeding.

In the vast majority of cases, the act of migrating elevates annual daylight exposure. This raises the hypothesis that daylight availability selects for latitudinal migration, potentially contributing to its evolution in animals such as diurnal birds with limited time during the spring and summer to feed young. However, photoperiodic mechanisms regulating annual cycles could constrain the evolution of such migrations, depending on how they affect photoperiodic schedules. Most migratory programmes are consistent with known mechanisms of avian photoperiodism, but the range of feasible mechanisms declines for transequatorial migrants, which experience semi‐annual, 180°‐phase‐shifts in their photoperiodic cycles.

Understanding photoperiodic constraints on migration are particularly important in this age of changing latitudinal distributions and phenologies driven by climate change.

Hope this helps and have a great day!!! :D

8 0
3 years ago
G6PD deficiency is an inherited condition in which the body doesn't have enough of the enzyme glucose-6-phosphate dehydrogenase,
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As verbalized, the enzyme glucose-6-phosphate dehydrogenase avails red blood cells function felicitously. Ergo, G6PD deficiency can cause hemolytic anemia characterized by having low calibers of red blood cells. The parasite that causes malaria does not survive well in G6PD deficient cells since they appear to have resistance against the disease.
6 0
3 years ago
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3. A husband and wife have three children: two boys and one girl. The
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The girl is a carrier
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A class is using marshmallows to demonstrate different chemicals' properties by heating and cooling the
Afina-wow [57]

Answer: Kenneth is using the Bunsen burner to roast the marshmallows and eat them.

Explanation: you should not be eating in a lb environment without direct permission from your teacher or supervisor.

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Cholesterol is repelled by water and can be found between the layers of the phospholipids in the plasma membrane. What can be co
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Answer:

The correct answer is cholesterol is nonpolar.

Explanation:

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     Cholesterol is non polar in nature.As a result cholesterol is repelled by water and can be found between the layers of the phospholipid in the plasma membrane.

   As cholesterol is non polar it is also hydrophobic in nature.

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