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Reproductive Modes

For discussing the functions of different structures of all organisms.

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Reproductive Modes

Postby A5HLEY » Thu Apr 17, 2008 10:32 pm

Can someone check my answers for these questions?

1). What is false about asexual reproduction in animals?
a). Asexual reproduction has a higher potential reproductive potential than sexual reproduction
b). Asexual reproduction always occurs by parthenogenesis
c). On average, offspring produced asexually have lower genetic diversity than offspring produced by sexual reproduction
d). In cyclic parthenogenesis, sexual reproduction occurs at the onset of winter

I said C.

2). Which of the following species would you expect that a female would have the highest number of offspring in a lifetime?
a). An internal fertilizing species
b). An external fertilizing species
c). A species of coral that reproduces by budding
d). A species that reproduces by fragmentation

I said B

3). Which of the following is NOT an effect of estrogen?
a). In low concentrations, estrogen inhibits FSH and LH
b). Estrogens stimulate the development and maintenance of the uterine wall
c). Estrogens in high concentrations stimulate a surge in LH
d). Estrogens directly stimulate the production of progesterone

I said D

4). Estrogen and progesterone together ____.
a). inhibit pituitary hormones
b). stimulate the development of the endometrium
c). are produced by the follicle and corpus leteum
d). all of the above are correct

I said D

5). Why are embryonic stem cells thought to have a greater potential in medical treatments than adult stem cells?
a). Embryonic stem cells may have a greater potential to differentiate into more types of cells
b). Embryonic stem cells stimulate cytotoxic T-cells
c). Embryonic stem cells have large effects on nephron function
d). Only embryonic stem cells can be grown in cell culture

I said D


If anyone could check these... even if you can only check one! Any help is greatly appreciated... thank you!
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Postby Darby » Thu Apr 17, 2008 11:50 pm

Number 1 is wrong. You do know you're looking for an answer that is false, right-?

2 looks right.

Not sure on 3.

4 looks right.

5 is wrong. One should always be careful of "only" or "never" or "always" answers.
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Postby A5HLEY » Fri Apr 18, 2008 12:03 am

Would 5 be A?
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Postby Darby » Fri Apr 18, 2008 4:04 pm

Should be.
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