An extant organism is found to be almost
unchanged from its 200 million year old fossil.
This is an example of:
a. stasis.
b. coevolution.
c. mass extinction.
d. adaptive radiation.
e. none of these
A
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While running in a garden, a girl steps on an old board and a nail goes through her shoe and skin, causing a deep
puncture wound. Which non-specific defense mechanism will aid in protecting her from pathogens?
a. ciliated epithelial cells b. lysozyme c. acidic skin secretions d. inflammation e. cytotoxic T cells
The long arm of a chromosome is called the ____________________ arm.Fill in the blank(s) with the appropriate word(s)
Each of the following is involved in regulating mitotic Cdk activity except
A) cyclin synthesis and degradation. B) Cdk synthesis and degradation. C) Cdk phosphorylation. D) Cdk dephosphorylation. E) All are involved in regulating mitotic Cdk activity.
Your cells most readily obtain energy from
A. C6H12O6. B. Glyceraldehyde-3-phosphate. C. ATP. D. NADH2.