A developing human is considered an embryo after ________ weeks

A) 16 B) 4 C) 12 D) 2 E) 8


D

Biology & Microbiology

You might also like to view...

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

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

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