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3 years ago

Why is it necessary for sex cells

Biology

2 answers:

jeka943 years ago

4 0

The answer is B. they are haploid so they create a diploid organisim. 23+23=46

Arisa [49]3 years ago

3 0

You answer should be c if not I’m sorry I couldn’t help

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Hematopoiesis occurs in which of the following?

Alekssandra [29.7K]

Answer:

The correct answer will be option- bone marrow.

Explanation:

Hematopoiesis is the process of the formation of the cellular components of the blood from the stem cells.

The cellular components are formed in the hematopoietic system which includes liver, bone marrow and spleen. In infants, the blood cells are formed continuously from the liver, spleen and bone marrow but in adults, the blood cells are formed from the bone marrow mainly.

Thus, option- bone marrow is the correct answer.

4 0

3 years ago

A 20-pound object is dropped from a 50-foot bridge onto the ground below it. A 50-pound object is dropped from a 100-foot cliff

ira [324]

The 50 pound object will reach the ground first.

Explanation:

Using the second equation of motion, we can derive the time taken for each of the object to reach the ground. As the object is thrown from the top of the bridge or cliff, acceleration due to gravity will be acting on them.

So, $s = ut+\frac{1}{2} at^{2}$

The value of s for the object thrown from 50 foot bridge is given as 50 ft. The initial velocity of the object will be zero. The acceleration can be written as the ratio of mass to gravitational force.

Then, $s = (0) t +\frac{1}{2}*\frac{m}{F}*t^{2}$

$50 = \frac{20}{2F} t^{2} \\\\t^{2} = \frac{100F}{20}$

$t = \sqrt{5F}$

Then, consider the time taken for the 50 pound object to reach the bottom of 100 ft cliff as t₁ and the displacement in this case is 100 ft.

Then, $100 = (0)t +\frac{1}{2}*\frac{50}{F}*t_{1}^{2} \\\\t_{1}^{2} =\frac{200F}{50}$

$t_{1} = 2 \sqrt{F}$

Since, the gravitational force acting on both the objects will be same, the ratio of time taken is

$\frac{t }{t_{1} }=\frac{\sqrt{5F} }{2\sqrt{F}} = \frac{\sqrt{5} }{2}$

So, the time taken for the 20 pound object to reach the ground of 50 ft bridge is √5 s =2.236 s and the time taken for the 50 pound object to reach the ground of 100 ft cliff is 2 s.

Thus, the 50 pound object will reach the ground first.

5 0

3 years ago

In aerobic cellular respiration what happens to carbon

miss Akunina [59]

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8 0

3 years ago

What effect did the human population have on Easter Island? How did they change the island's natural cycling of matter and energ

docker41 [41]

Answer:

The population history of the island remains highly controversial. In addition to internal conflict, the population crash has been attributed to “ecocide,” in which the Island's resources were exhausted by its inhabitants, reducing its ability to support human life.

Explanation:

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3 years ago

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How mant hands does spider has

Fynjy0 [20]

I believe you mean legs. If you do, the answer you are looking for is: All spiders have eight legs. They also have two small appendages at the front that are modified legs; these are called pedipalps.

4 0

3 years ago

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