In meiosis chromosomes containing sister chromatids (not homologous chromosomes) align along the center of the cell during
A. prophase I.
B. prophase II.
C. interphase II.
D. metaphase I.
E. metaphase II.
E. metaphase II.
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_______ is a type of simple plant tissue that is known for photosynthesis, storage, and secretion
a. vascular b. parenchyma c. collenchyma d. sclerenchyma e. dermal
A twitch is contraction and relaxation of
A. one neuron. B. one muscle cell. C. an entire muscle. D. one sarcomere. E. several muscles.
Homo erectus existed until approximately:a
5,000 years ago. b. 10,000 years ago. c. 100,000 years ago. d. 200,000 years ago. e. 1,500,000 years ago.
Roots, used for anchoring the plant in soil and enhancing absorption of soil water and nutrients, evolved in the seedless vascular plant phylum ________.
A. Hepatophyta B. Monilophyta C. Bryophyta D. Lucophyta E. Anthocerophyta