Which structure surrounds and protects the root apical meristem?
a. the pericycle
b. the root cap
c. the root hairs
d. the endodermis
Ans: b. the root cap
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The origin of a skeletal muscle is
(a) attached to the less mobile portion of the skeleton. (b) attached to the portion of the skeleton that moves when the muscle contracts. (c) never attached to the skeleton. (d) its belly.
Spongiform encephalopathies are
A. associated with abnormal, transmissible, protein in the brain. B. caused by prions. C. chronic, fatal infections of the nervous system. D. Creutzfeldt-Jacob disease, kuru, and Gertsmann-Straussler-Scheinker syndrome. E. All of the choices are correct.
In angiosperms, the gametophyte generation:a
results from the fertilization of two gametes. b. is dominant. c. is nutritionally dependent on the sporophyte. d. produces gametes via meiosis. e. produces spores by mitosis
Genetically modified organisms that acquire genes from a different species are called ________ organisms
A) mutant B) synthetic C) cloned D) transgenic