Members of the ___ Echinoderm lineage include sessile sea lilies and feather stars, which can swim or crawl as adults
a. Echinoidea
b. Ophiuroidea
c. Crinoidea
d. Holothuroidea
e. Asteroidea
ANSWER: c
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Which autosomal dominant condition can be controlled by dietary means?
a. cystic fibrosis b. PKU c. Tay-Sachs disease d. Marfan syndrome e. achondroplasia
Which type of plant hormone generally acts as a growth inhibitor?
A) auxins B) gibberellins C) cytokinins D) abscisic acid (ABA)
Which of the following is an advantage of the
three-chambered heart over the two-chambered heart?
a. blood flow is faster when there are two circuits instead of one circuit b. blood pressure is independently controlled in each vascular circuit c. oxygen-rich and oxygen-poor blood do not mix d. capillary beds are possible with a threechambered heart but not a two-chambered heart e. more than one of these is an advantage of the three-chambered heart over the twochambered heart
Steroid hormones are derived from
a. free fatty acids. b. cortisol. c. tyrosine. d. cholesterol. e. alanine.