Of the following features, which is the most widely shared in the animal kingdom?
A. radial cleavage
B. a body plan with symmetry
C. protostome development
D. molting of a cuticle or exoskeleton
E. a triploblastic embryo
Answer: B
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The various flower parts are attached to a modified branch called the:
a. style b. receptacle c. stigma d. filament e. sepal
Sister chromatids are separated from each other during
a. metaphase I. b. anaphase I. c. telophase II. d. anaphase II. e. metaphase II.
Assume that a woman has a "normal" 28-day reproductive cycle. She is concerned about the times in which she may get pregnant. Her partner tells her that the only day she has to worry about in terms of getting pregnant is the day she ovulates
Explain to her why this is not the case.
A major reason reptiles were adapted to life on land was their ability to _____.
a. quickly evolve into birds b. produce shelled, waterproof eggs containing a supply of water c. maintain a constant body temperature d. use atmospheric oxygen by breathing through gills e. rapidly replace body water lost through evaporation