In sea urchins, the fertilization envelope forms from the:a
vitelline envelope.
b. jelly coat.
c. zona pellucida.
d. plasma membrane.
e. granulosa cells.
a
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What category describes a species that, while not presently at risk of extinction, could likely be at risk of extinction in the near future?
A. A species of concern B. A threatened species C. An invasive species D. An endemic species
Lignified, tube-like structures that branch throughout the body of some plants, conducting water and solutes, are called
____.
a. vascular tissues b. apical meristems c. root systems d. rhizomes e. shoot systems
When an endospore germinates, it gives rise to two daughter cells called vegetative cells
Indicate whether the statement is true or false
Which is true regarding Herceptin therapy?
A) It neutralizes the growth factor EGF. B) It acts as an immunotoxin to target and kill cancer cells. C) It is used to treat some breast cancer patients. D) It is a vaccine to prevent the development of cancer. E) It is an endotoxin that stimulates TNF by macrophages.