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harina [27]
3 years ago
12

The Moon orbits the Earth once in about _______. A. 365 days B. 28 days C. 24 hours D. 7 days

Biology
2 answers:
Virty [35]3 years ago
5 0

b. 28 days

hope this helps

kati45 [8]3 years ago
3 0

Answer: Option B. 28 days

Explanation:

The moon orbits the Earth in about 28 days.

Moon also takes 28 days to rotate once on its own, that is why it seems still in it's position.  

The moon rotates around the Earth in an elliptical orbit. The moon rotates in slower rate when it is closest to earth and rotates in faster rate when far from earth. The side of moon facing earth surface is called the near side. During new moon phase, when the moon comes between the Earth and the sun, the back side of the moon gets hide by daylight.

The moon changes its shape during rotation of earth as per the lunar theory. It involves several phases in the given sequence First Quarter following Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, Waning Crescent, New Moon and Waxing Crescent and repeats.

Hence, the correct option is B. 28 days.

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You learn that a Mars lander has retrieved a bacterial sample from the polar ice caps. You obtain a sample of these bacteria and
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Answer:

a. conservative replication

b. semi conservative replication

c. dispersive replication

d. discontinuous replication

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The CORRECT ANSWER IS C.

c. dispersive replication

Explanation:

The attached image shows a single band that becomes lighter (in volume) and increase in darker intensity (in times of color) is revealed with consecutive replications. The major pattern that would produce these outcome is dispersive replication.

Conservative replication do reveal two bands (a 14N for the wholly latest molecule, and a 15N for the totally antiquated molecule) after the initial replication. Therefore, this wholly wrong.

Semi-conservative replication reveal an individual band of transitional weight after the initial  replication, followed by two bands following the second replication (one of transitional weight, and the other at the 14N position). These two bands is observed in each following replication, with the transitional weight becoming lighter in color as the 14N band is seen to appear darker in color.

The real pattern gives an individual band that pinpoints to all molecules in an individual replicative cycle possessing the same constituents.

Dispersive replication, has its molecules to be a blend of old (15N) and new (14N) strands. Each replication raises the ratio of new to old strands as it explains the reason an individual band is shown raised (lighter in weight) with every replication.

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Select the liquid to test.

Place the liquid in a sealed container.

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