Transposable Elements Are DNA Sequences That

question 21

Multiple Choice

Transposable elements are DNA sequences that:

• A) are not coded to produce proteins.
• B) contain numerous point mutations.
• C) occur only on the X and Y chromosomes.
• D) insert themselves into other parts of the genome.

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Definitions:

Pteridophyta

A division of non-flowering plants that includes ferns, horsetails, and whisk ferns, characterized by vascular tissue and the absence of seeds.

Gnetophyta

A division of gymnosperms comprising woody plants with some angiosperm-like features, including the genera Ephedra, Gnetum, and Welwitschia.

Gametophyte

The haploid phase in the life cycle of plants and algae that produces gametes for sexual reproduction.

Pollen Grain

The immature male gametophyte of seed plants (gymnosperms and angiosperms) that produces sperm capable of fertilization.