I have some questions in biology?

Question

1.In the human male, several hundred million sperm are produced by spermatogenesis occurring in
a. interstitial cells.
b. the prostate.
c. seminiferous tubules.
d. the vas deferens.
2.Which statement is true?
a. Breathing rate and depth are completely under voluntary control.
b. A person can commit suicide by holding one's breath.
c. The contraction of the diaphragm and muscle of the rib cage are under the control of the brain.
d. There are chemoreceptors in the brain that monitor carbon dioxide content in the blood and control breathing.
e. The contraction of the diaphragm and muscle of the rib cage are under the control of the brain, and there are chemoreceptors in the brain that monitor carbon dioxide content in the blood and control breathing.
3.The release of DDT into the environment to control some insect pests will result in the highest detectable concentrations

a. at the bottom of the food chain.


b. in the targeted insect pest.


c. in the middle of the food chain.


d. at the end of the food chain.


e. in producers.

Answer 1

I Think, c,e,d, BTW, See Rachel Carson.


Labsci, Below, Looks to Be Correct.

Answer 2

1. c
The vas is for transport, the prostate for nutrients, the interstitial cells release hormones.

2. e
This highlights both the voluntary and involuntary aspects of breathing.

3. d
Bioaccumulation of toxins.

Answer 3

1 C
2. C and D ? probably C
3. D

not much consensus.

Answer 4

b
c
a

Answer 5

c, e, d.. I think..