Body appendages as diverse as crab legs, beetle legs,
sea star arms, butterfly wings, fish fins, and mouse
feet start out as
a. clusters of cells in the limb buds.
b. cerebral cells.
c. cardiac cells.
d. offshoots of the sperm cell.
e. offshoots of the egg.
Answer: a
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Mitosis and cytoplasmic division of a cell in an ovule produces four __________, one of which gives
rise to the female gametophyte. Fill in the blank(s) with the appropriate word(s).
What Takes Place During Metaphase I? - spindle apparatus - homologue pairs
What will be an ideal response?
Why are lampreys classified as vertebrates?
A) They lack gills. B) They are ectothermic. C) They lack jaws. D) They have an exoskeleton. E) Their nerve cord is surrounded by cartilage.
Which of the following has the smallest size?
A neutron A molecule of glucose An atom of oxygen A cell