Which of the Following Characteristics Generally Applies to Protostome Development

question 48

Multiple Choice

Which of the following characteristics generally applies to protostome development?

• A) radial cleavage
• B) determinate cleavage
• C) diploblastic embryo
• D) blastopore becomes the anus
• E) archenteron absent

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Definitions:

Barr Bodies

Inactivated X chromosomes found in the nuclei of cells in female organisms, visible as a dense mass, and a key component in dosage compensation.

Promoters

DNA sequences located near the beginning of a gene that signal RNA polymerase where to start transcription.

Frameshift Mutation

A genetic mutation caused by insertions or deletions of a number of nucleotides in a DNA sequence that is not divisible by three, altering the reading frame.

Nucleotide Sequence

The order of nucleotides in a segment of DNA or RNA, determining genetic information.