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Illusion [34]
3 years ago
10

About four or five days after fertilization, a group of cells forms a ball-like structure. What is the name of this structure? A

. Heart B. Placenta C. Blastocyst D. Stem Cell
Biology
2 answers:
tensa zangetsu [6.8K]3 years ago
8 0
I believe the answer is C.
sasho [114]3 years ago
5 0
Your answer would be Blastocyst. 
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how factors such as blood pressure blood volume blood viscosity resistance disease and exercice affect blood flow
schepotkina [342]

Blood is essential for many organisms, such as humans and animals, for its important function of transporting substances (food, oxygen), vitamins, waste (carbon dioxide), hormones, etc. to all tissues and cells of the body.

1) Blood volume

If the blood volume increases ==> the blood flow increases.

2) Viscosity of blood

If we have an increase in blood viscosity ==> we have a decrease in blood flow

3) Peripheral Resistance

If there is an increase in peripheral resistance ==> the blood flow decreases

4) Diameter of blood vessels

If we have an increase in diameter of

blood vessels ==> decreased peripheral resistance ==> increased blood flow

5) Blood pressure

If the blood pressure increases ==> the blood flow increases.

6) In case of diseases

In the case of atherosclerosis or acute coronary syndrome ==> blood flow decreases.

7) Physical excercises:

During physical exercises ==> the heart rate increases ==> the blood flow increases.

3 0
3 years ago
1. Why are these moths called "peppered moths?"
riadik2000 [5.3K]

Answer:

they got black dot on their white wings.

Explanation:

And black pepper moths dont but they are natural selected from the white pepper moths.

8 0
3 years ago
1. Which of the following are functions of the nervous system? (Choose all that apply.)
xxMikexx [17]

Answer:

Maybe 2,3 points

Explanation:

1. receive stimuli messages from inside and outside the body..

2. responding to stimuli by sending messages throughout the body.

6 0
3 years ago
Question:
dolphi86 [110]
  • Bacteria can reporduce both Outside the host as well as inside the host and they are made of cells.
  • Virus can only reproduce inside the host and outside they are almost dead.They are not made of cells

So

viruses are not considered as living

5 0
2 years ago
From where do we obtain the cells of our test subject?
drek231 [11]
I believe we obtain the cells of our test subject from DNA testing

hope it works!!

3 0
3 years ago
Read 2 more answers
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