Which of the following are causes for extinction?
A. pollution
B. habitat loss
C. exotic species
D. All of these are causes for extinction.
E. None of these are causes for extinction.
Answer: D
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In humans, the egg provides the mitochondria to the zygote. In plants, which organelles would be provided by the egg and not by the sperm?
A. nuclei and chloroplasts B. chloroplasts and mitochondria C. nuclei D. mitochondria E. chloroplasts
Gardasil
a. is a vaccine against four types of HPV. b. is most effective in younger girls who have yet to become sexually active. c. was approved by the FDA in 2006. d. prevents cervical cancer shown to be caused by HPV strains 16 and 18. e. is described by all of these
Of the following, which is the earliest step in the formation of fossil fuels?
A) subjecting organic matter to extreme pressure B) flooding swamps with seawater C) incomplete decomposition of organic matter D) subjecting organic matter to extreme heat
In the process of nitrogen fixation, if you start with 5 molecules of N2, you will need ________ hydrogen atoms and ________ ATP molecules to make ________ molecules of ammonia.
A. 30; 80; 10 B. 30; 80; 5 C. 15; 80; 10 D. 15; 16; 5