Which of the following statements considering the human body as an ecosystem is incorrect?
A. Lactobacillus acidophilus and Lactobacillus jensenii are populations within the vaginal community.
B. The microbes present in dental plaque constitute a community.
C. The skin, the gut, and the nasopharynx are all habitats.
D. An infection can be considered a habitat's response to an alteration in environmental conditions.
Answer: D
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Attributes of an organism that promote pathogenicity are called
A. disease factors. B. colonization factors. C. mutualistic. D. virulence factors.
Amanda is curious to know how many chromosomes are in each somatic cell of a chicken she was relishing. She looks it up and finds that it has 78 chromosomes. Therefore, a sperm or an unfertilized egg from a chicken would contain ________ chromosomes.
A) 23 B) 39 C) 46 D) 78
Ghost shrimp and mud shrimp play an active role in:
a. compacting the sediment. b. reducing species through competition. c. decomposition of seagrass roots. d. oxygenating the sediments. e. consuming marsh plants.
Which stage(s) is (are) the diploid sporozoite
stage(s) of the Plasmodium (malaria) parasite? a. A b. B c. C d. A and B e. none of these