Sex chromosomes do all of the following EXCEPT
a. determine gender.
b. vary from one sex to another.
c. carry some genes that have nothing to do with sex.
d. appear in a diploid cell as either XX or XY.
e. appear in a haploid cell as either XX or XY.
E
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Members of the subphylum include spiders, ticks, mites, scorpions, and horseshoe crabs. Their first
pair of appendages are fanglike structures used for biting prey, and their second pair of appendages, called pedipalps, are used for many different activities.
a. Myriapoda b. Trilobita c. Chelicerata d. Hexapoda e. Crustacea
In lineages that moved onto land, gills were replaced by lungs; kidneys became better at conserving __________, and
the circulatory system became more efficient. Fill in the blank(s) with the appropriate word(s).
A monogamous couple is researching birth control methods. They want children in the future, and the woman
currently has high blood pressure. Which birth control method would be best for them? What will be an ideal response?
Which of the following statements about tunicates indicates that these animals are chordates?
A) Larvae show segmentation, but adults do not. B) Larvae have a dorsal hollow nerve cord, a post-anal tail, pharyngeal slits, and a notochord. C) Larvae and adults both have a true coelom.