____ plants do not develop aerial parts that are composed of lignin
a. Herbaceous
b. Woody
c. Deciduous
d. Evergreen
e. Shrub
a
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Which of the following is common to both extracellular and intracellular digestion?
A. the ability to phagocytose food particles B. a slow speed of digestion C. the presence of a digestive cavity D. the ability to consume both large and small food items E. None of these characteristics are common to both extra- and intracellular digestion.
The portal of entry for the largest number of pathogens is the _____
Fill in the blank(s) with the appropriate word(s).
At the time of fertilization, the maturation of the human oogonium has resulted in _____
A) one secondary oocyte B) two primary oocytes C) four secondary oocytes D) four zygotes
Ras mutations involving amino acid 12 may be oncogenic if they
a) Destabilize the protein causing it to fall apart b) Increase the cleavage rate of bound GTP back to GDP c) Stabillize the binding of GTP to Ras d) Block the ability of Ras to interact with its normal downstream targets