A cell that is observed under the microscope is found to have its DNA enclosed in a nucleus, and has other specialized
internal compartments. The cell is a(n) ____.
a. bacterium
b. E. coli
c. prokaryote
d. eukaryote
e. archaean
d
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Instinctive behaviors that are performed in exactly the same way every time they are triggered are defined as ____
a. habitual behaviors b. sign stimuli c. conditioned behaviors d. imprinted responses e. fixed action patterns
By evaluating and selecting mates with superior qualities, an animal can increase its
A. reproductive success. B. learning. C. competitive strategies. D. foraging efficiency. E. length of life.
Helminths are identified in the laboratory by microscopic examination of body fluids and excretions containing the eggs and larvae.
a. true b. false
Thanks to a new conservation program, a population with only 200 individuals at the beginning of the year is growing exponentially. The population has a per capita birth rate of 0.5 per year and a death rate of 0.2 per year. What is the growth rate
during the year? What will the population be at the end of the year? A) growth rate = 60 per year; population = 260 B) growth rate = 6 per year; population = 206 C) growth rate = 260 per year; population = 60 D) growth rate = 30 per year; population = 230