A community of organisms interacting with their physical environment is a(n)
A. population.
B. ecosystem.
C. biosphere.
D. organism.
E. macromolecular community.
Answer: B
Biology & Microbiology
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If there are 100 individuals in a population and 20 are homozygous for B, 60 are heterozygous, and 20 are homozygous for b, what is the allele frequency of B?
A. 20% B. 40% C. 50% D. 80% E. It can't be calculated from this information.
Biology & Microbiology
The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is
A) 7. B) 10. C) 16. D) 19. E) 24.
Biology & Microbiology
Earth is tilted about how many degrees on its axis?
a. 8 b. 15 c. 23 d. 30 e. 38
Biology & Microbiology
Which of the following species of Plasmodium causes cerebral malaria?
A) only P. falciparum B) P. ovale and P. malariae C) P. ovale and P. vivax D) P. vivax and P. malariae E) P. vivax, P. malariae, and P. vivax
Biology & Microbiology