Which of the following is NOT unique to
angiosperms?
a. endosperm
b. a cell within the female gametophyte that
has two nuclei
c. pollen tubes
d. double fertilization
e. more than one of these is NOT unique to
angiosperms
C
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Production of a neurotoxin that binds to target sites on spinal cord neurons responsible for inhibiting skeletal muscle contraction is a characteristic of ________.
A. Clostridium tetani B. Clostridium difficile C. Clostridium perfringens D. Clostridium botulinum
Antipodals and synergids are
A. produced in the female gametophyte. B. the result of double fertilization. C. what will fuse to form the endosperm. D. responsible for pollen tube formation. E. nonfunctional vestigal structures.
The nucleus of a differentiated cell contains all of the genetic information necessary to direct the development of an entire organism. This nucleus is therefore said to be ________
Fill in the blank with correct word.
Coated pits are converted to coated vesicles by formation of rings of the protein
a. caveolin. b. clathrin. c. COPI. d. dynamin.