Which of the following affect(s) the developmental
pathways that different embryonic cells eventually
follow?
a. sperm organelles
b. sperm RNA
c. sperm cytoplasm
d. egg cytoplasm
e. all of these
Answer: d
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A plant that has the mutant form of the WEREWOLF gene (wer) would be identifiable by
A. the excessive number of vascular bundles in stem. B. the lack of fibers in the outer portions of the stem. C. the abundance of microscopic hairs on the root. D. the extra thick layer of mesophyll cells in the leaf. E. the lack of microscopic hairs along the epidermis of the root.
The mature ovum is produced by maturation of the
a. oogonium. b. primary oocyte. c. secondary polar body. d. polar body I. e. none of these.
The ____________________ gene is Y-linked and plays a major role in causing the undifferentiated
gonad to develop into a testis. Fill in the blank(s) with the appropriate word(s).
Seedless vascular plants include all of the following EXCEPT
A. Psilotum-Pteridophytes. B. Sphagnum-Bryophyta. C. whisk ferns-Psilotophyta. D. horsetails-Sphenophyta.