A developing human is considered an embryo after ________ weeks
A) 16 B) 4 C) 12 D) 2 E) 8
D
Biology & Microbiology
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In response to increased carbon dioxide levels in the atmosphere, stomata in leaves of some species
have ________.
a. become smaller b. declined in number c. increased in number d. become encoded by the gene YDA e. become larger
Biology & Microbiology
Restriction enzymes
1.are produced by human cells. 2.cleave RNA. 3.cleave DNA. 4.are man made. 5.were discovered in the 1940s.
Biology & Microbiology
Succession that occurs on abandoned agricultural fields is best described as
A. secondary succession. B. primary succession. C. prairie succession. D. biome succession.
Biology & Microbiology
Glycogen is to animal cells as ________ is to plant cells.
A. starch B. sugar C. protein D. lipid E. cellulose
Biology & Microbiology