Plant growth is due to actively dividing cells called:

A. nodes.
B. primordial cells.
C. meristem cells.
D. vascular cells.
E. bundle sheath cells.


C

Biology & Microbiology

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Structures used for bulk transport include all of the following except:

A. the mesoglea of jellyfish. B. the circulatory system of humans. C. the vascular tissues of plants. D. the tubular cells of giant kelps. E. All of these options are structures used for bulk transport.

Biology & Microbiology

At the point in the cell cycle when mitosis begins

A) DNA replication begins. B) each chromosome consists of two identical chromatids joined at the centromere. C) the number of chromosomes is reduced to half. D) the cell enters a dormant phase.

Biology & Microbiology

All organisms in an ecosystem take part in a hierarchy of feeding relationships called __________. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

You are a NASA scientist and have discovered an organism in outer space that contains its genetic material in the cytoplasm rather than in a nucleus. Given this characteristic, how might you classify this organism?

A. Eukaryote B. Prokaryote C. Heterotroph D. Autotroph

Biology & Microbiology