Which of the following statements regarding nutritive material and embryo in seeds is true?
A. In gymnosperms the female gametophyte
provides food for the embryo.
B. In angiosperms the female gametophyte
provides food for the embryo.
C. In gymnosperms the embryo is relatively
small.
D. In angiosperms the embryo is relatively
large.
E. Gymnosperms seeds do not have a seed
coat.
A
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The inability of a man to produce LH would result in
A. the inability of Leydig cells to produce testosterone. B. the inability of the pituitary to produce FSH. C. the loss of positive feedback control on GnRH release. D. the degeneration of the male reproductive tract. E. feminization of the testes.
Four of the five answers listed below are characteristics of cnidarians. Select the exception
a. ciliated larvae b. polyp form c. jellylike matrix d. nematocyst e. pharynx
In what way are animals that are normally active during the daytime different than animals that are normally active at night?
a. Animals that are normally active during the daytime display worse visual acuity under high-light conditions compared to animals that are normally active during the night. b. Animals that are normally active during the daytime display improved visual acuity under high-light conditions compared to animals that are active during the night. c. Animals that are normally active at night display worse visual acuity under low-light conditions compared to animals that are normally active during the daytime. d. Animals that are normally active at night display improved visual acuity under low-light conditions compared to animals that are normally active during the daytime.
The simplest type of learning is called ________ learning.
A. nonassociative B. associative C. classical D. operant