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

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

Helminths are identified in the laboratory by microscopic examination of body fluids and excretions containing the eggs and larvae.

a. true b. false

Biology & Microbiology

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

Biology & Microbiology