The primary reason for hybrid sterility is
a. the inability of the hybrid to attract a mate.
b. the difficulty in finding a suitable habitat in which to survive.
c. that the hybrids are usually weak and have difficulty surviving to reproductive maturity.
d. that hybrids cannot produce viable gametes.
e. the inability of the hybrid to develop an appropriate courtship pattern.
d
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________ are activities of a chemotherapeutic agent that damage the host either by inhibiting the same process in the host as in the target cell or by damaging other processes.
Fill in the blank(s) with the appropriate word(s).
Which of the following represents
nitrification?
a. conversion of nitrogen gas to ammonia b. conversion of nitrogen gas to nitrate c. conversion of ammonia to nitrate d. conversion of nitrate to ammonia e. conversion of nitrate to nitrogen gas
Which of the following root tissues gives rise to lateral roots?
A) endodermis B) phloem C) epidermis D) pericycle
_____ is the term for a starting a new culture from an existing one.
Fill in the blank(s) with the appropriate word(s).