The condition of having no sperm in the semen is called ____________________
Fill in the blank(s) with correct word
azoospermia
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Embryonic stem cells are pluripotent, able to ____
a. divide an unlimited amount of times b. give rise to most, but not all body cell types c. give rise to any of the body cell types d. divide a limited amount of times e. give rise to different, unique individuals
Alien species are most likely to disrupt natural ecosystems when they:
A) are closely related to native species. B) are similar in appearance to native species. C) assume ecosystem roles of native species. D) are larger in size than native species.
Plants with "naked" seeds belong to the _______.
a) nonvascular plants b) angiosperms c) seedless vascular plants d) gymnosperms
All of the following are found in the cell walls of gram-positive bacteria EXCEPT_______
a. peptidoglycan b. teichoic acid c. lipid A d. N-acetylglucosamine e. lipoteichoic acid