Multicellular gameotophytes are the product of spores from
A) anthers and stigmas.
B) ovules and anthers.
C) stigmas and sepals.
D) ovules and petals.
Answer: B
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Children have short eustachian tubes, and are susceptible to ____
a. otitis media b. tinnitus c. congenital deafness d. vertigo e. nerve deafness
During which stage do chromosomes line up in single file on the equatorial plane?
A. metaphase II B. telophase I C. telophase II D. anaphase II E. metaphase I
Frame-shift mutations:
A: only arise from deletions, not from insertions. B: almost always lead to loss of function. C: cause the ribosome to misread DNA. D: result in a single amino acid substitution. E: result from a deletion of three nucleotides.
Looking at the figure above, indicate which of the following is true:
a. ‘Fish' is not a monophyletic group. b. ‘Fish' is a monophyletic group. c. ‘Tetrapod vertebrates' is a monophyletic group. d. A and C.