The respiratory surface of an earthworm is located in the _____
a. lungs
b. gills
c. skin
d. gastrovascular cavities
e. trachea
ANSWER: c
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Ernest Rutherford's key experiment on alpha particle bombardment of gold foil was important to the development of
A. detection methods for protons. B. alpha particle emitters. C. gold as an element. D. the modern model for atomic structure. E. the concept that atoms have a homogenous distribution of protons throughout the atom.
An hypothesis currently getting a lot of attention
concerning the origin of biological molecules is that they originated a. in hot springs. b. near volcanoes. c. near hydrothermal oceanic vents. d. in salt lakes. e. in tidal pools.
Which mode of inheritance results in the phenotype of a heterozygote being indistinguishable from that of an organism homozygous for the dominant allele?
A) complete dominance B) incomplete dominance C) codominance D) epistasis E) incomplete penetrance
Which characteristic is typical of the vegetal pole of an embryo?
A) The vegetal pole is composed of a single, large cell. B) The vegetal pole contains relatively less yolk. C) The vegetal pole is always hollow. D) The vegetal pole is the site of the development of the mouth. E) The vegetal pole has a relatively greater proportion of yolk.