Where does germination of a pollen grain occur in a flowering plant?

(a) in the anther.
(b) in the micropyle.
(c) on the surface of the corolla.
(d) on the stigma.


(d) on the stigma.

Biology & Microbiology

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What feature of cardiac muscle helps the cells coordinate their contraction as a single unit?

A. Fused cells with multiple nuclei B. Intercalated disks rich in gap junctions C. Covalent bonds between actin and myosin molecules D. Large numbers of motor neurons

Biology & Microbiology

Fruits that develop from a flower with many separate ovaries are referred to as:

a. accessory fruits. b. aggregate fruits. c. dry fruits. d. multiple fruits. e. simple fruits.

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A possible sequence of nucleotides in the template strand of DNA that would code for the polypeptide sequence phe-leu-ile-val would be

A. 5' TTG-CTA-CAG-TAG 3'. B. 3' AAA-AAT-ATA-ACA 5'. C. 3' AAA-GAA-TAA-CAA 5'. D. 5' AUG-CTG-CAG-TAT 3'. E 3' AAC-GAC-GUC-AUA 5'.

Biology & Microbiology

Cell-mediated immunity is a function of

A. NK cells. B. T lymphocytes. C. B lymphocytes. D. dendritic cells. E. macrophages.

Biology & Microbiology