The majority of animal species are _____.
Fill in the blank(s) with the appropriate word(s).
Ans: insects
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The MHC complex is a set of genes that
A. encodes cell recognition molecules. B. is located on chromosome 6. C. produces molecules to which antigens must attach in order to activate cell-mediated immunity. D. prevents the immune system from attacking the body's own tissues. E. has all of these traits.
Which statement is true?
a. The anterior pituitary gland is essentially nervous tissue. b. The anterior pituitary gland secretes only two hormones. c. Only the posterior part of the pituitary gland could be called the "master gland." d. The posterior pituitary gland only stores hormones produced by the hypothalamus. e. The anterior pituitary gland is conencted to the hpothalamus via the infindibulum.
The neural crest cells of vertebrates influence the development of all of the following except the:a
lungs. b. nerves. c. cranium. d. jaws. e. head muscles.
The microspore develops into a
A. megasporocyte. B. zygote. C. microsporocyte. D. female gametophyte. E. male gametophyte.