A two-way gut system (i.e., gastrovascular cavity) is a characteristic of
A) Platyhelminths.
B) Annelids.
C) Arthropods.
D) Molluscs.
Answer: A
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Why are sex-linked traits expressed more frequently in males than in females?
A) Males have fewer chromosomes than females. B) Males have more chromosomes than females. C) Males have more sex chromosomes than females. D) Males have a smaller Y chromosome that contains fewer genes that correspond to the larger X chromosome. E) Males have a larger Y chromosome that contains more genes that correspond to the smaller X chromosome.
How does surfactant reduce the surface tension of water in the lungs?
A. Reduces hydrogen bonding between water molecules B. Decomposes water C. Covers the alveoli D. All of the choices are correct.
An alternative term for uterine tube or oviduct is ____________________.
Fill in the blank(s) with the appropriate word(s).
Basophils increase in number when parasitic invasion occurs
Indicate whether the statement is true or false