The Protenor mode of sex determination is the ________
A) XO/YY scheme
B) scheme based on single translocations in the X chromosome
C) XX/XO scheme
D) hermaphroditic scheme
E) scheme based on F plasmids inserted into the FMR-1 gene
Answer: C
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The ultimate source of all energy in a terrestrial
ecosystem is a. the organic matter in all the organisms of the ecosystem. b. electrons from water molecules. c. sunlight. d. ATP. e. inorganic mineral ions in the soil.
Study the life cycle diagram. Label B is the ________ life cycle.
A. lysogenic B. lytic C. sexual D. alternation of generations
The study of the distribution of animals and plants around the world is ____.
A. diversity B. biogeography C. ecology D. natural history E. environmentalism
Which stage would show the development of the ectoderm and endoderm germ layers?
A. early gastrulation B. blastulation C. neurulation D. late gastrulation