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Dmitrij [34]
2 years ago
15

Hair has a medulla region that is variable. Describe the possible variations

Biology
1 answer:
e-lub [12.9K]2 years ago
8 0

Answer:

3 types I think

Explanation:

Continuous, Fragmented and absent.

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Why does speed of blood in arteries differ from speed of blood in capillaries
KengaRu [80]
The keyword here is "area per volume" which is available in both cases. Besides capillaries are smaller than arteries they have in total more area as there are many vessels of then. The More the area/volum, the less the velocity
8 0
3 years ago
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When you kick a soccer ball, you are using _____ to put the ball in motion. Question 1 options: A) force B) gravity C) chemistry
Ilia_Sergeevich [38]

Answer: A

Explanation:

Gravity is when you drop something, but in this case you aren’t dropping the ball. It definitely isn’t chemistry because you aren’t changing molecules or anything so that only leaves A which is the most reasonable answer anyways.

4 0
3 years ago
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Determine whether the statement is true or false. Suppose P(t) represents the population of bacteria at time t and suppose P'(t)
Lorico [155]

Answer:

TRUE

Explanation:

If the population follows a logistic growth curve, the graph of P vs t will look like the diagram below.

The rate of growth (P') increases slowly at first, then increases rapidly from 2 to 4, and then slows down, but always P > 0.

The graph has an inflection point at (3, 1000). That's the point at which the rate of growth starts slowing down.

When t < 3, P'' > 0.  

When t = 3, P'' = 0.

When t > 3, P'' < 0, because the rate of population growth is slowing down.

Thus, if the population is in the final phase of logistic growth, the population is increasing at a decreasing rate (TRUE)..

4 0
3 years ago
Which of the following is the equation for acceleration?
belka [17]

Answer:b.

Explanation:

3 0
3 years ago
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In Drosophila, the genes for body coloration and eye size are on different chromosomes. Normal-colored bodies are dominant to eb
Yuri [45]

Answer:

225 flies

Explanation:

Let gene for body colour : A

Let gene for eye type : B

Parent 1 : normal body and normal eyes = AABB

Parent 2: ebony body and eyeless = aabb

F1 : AABB X aabb = AaBb ( all have normal body and normal eye )

F1 progeny is self crossed given that the two genes are on different chromosomes which means they show independent assortment:

AaBb X AaBb =

A_B_ = normal body, normal eyes = 9

aaB_ = ebony body, normal eyes = 3

A_bb = normal body, eyeless  = 3    

aabb = ebony body, eyeless  =   1

Hence the ratio is 9 : 3 : 3 : 1

Out of the 400 flies:

(9/16) * 400 = 225 flies have normal body colour and normal eyes

7 0
2 years ago
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