The last mass extinction of dinosaurs on Earth
occurred between which two geologic periods?
a. Devonian and Carboniferous
b. Silurian and Devonian
c. Triassic and Permian
d. Cretaceous and Tertiary
e. Jurassic and Cretaceous
Answer: d
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Nerve impulses coming into the spinal cord enter via
a. intervertebral disks. b. neuroglia. c. the dorsal roots. d. Broca’s area. e. ventral roots.
Which of the following types of analysis allows scientists to visualize an individual's chromosomal makeup?
A) Karyotype analysis B) Pedigree analysis C) Genetic crosses D) Inheritance analysis E) Deletion mapping
Which of the following filtrates is not reabsorbed in significant quantities back into the bloodstream by the nephrons?
a. glucose b. ions c. urea d. water
In which one of the following processes is light energy converted to ATP, which is then used to synthesize organic molecules?
a) Photosynthesis b) Krebs cycle c) Fermentation d) Glycolysis