Pollen Grains Germinate

question 9

Multiple Choice

Pollen grains germinate

• A)in the style.
• B)in the ovule.
• C)on the stigma.
• D)at the micropyle.
• E)in the ovary.

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Definitions:

Germ Layers

The three primary layers of cells (ectoderm, mesoderm, and endoderm) in the early embryo that give rise to all organs and tissues in the body.

Embryonic Disk

Point in the inner cell mass at which the embryo begins to be formed.

Ectoderm

Outermost of the three germ layers of an embryo.

Mesoderm

The middle layer of an embryo in early development, which gives rise to muscles, bones, and the circulatory system.