There are 22 species of snakes in Canada and 126 species in the United States. Approximately how many do you think there are in Mexico?
A) 0
B) 3
C) 30
D) 300
Ans: D) 300
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_____ can lead to resource partitioning
a. Mutualism c. Commensalism b. Parasitism d. Interspecific competition
Consider that you have access to use fluorescent tagging of specific proteins and view cells in a confocal microscope. You isolate a cell with the fluorescent dyes, showing that a very tiny, single-celled organism has not only a cell membrane, but internally folded membranes. You determine also that the membranes do not completely surround internal specialized compartments of the cell. You identify this as
A. a prokaryote. B. a yeast. C. a eukaryote. D. a plant. E. an animal.
Homeotic genes ________
A) have very different sequences in plant cells as compared to animal cells B) are an example of convergent evolution C) are evidence of the common ancestry of eukaryotic organisms D) regulate gene expression in both prokaryotic and eukaryotic cells
Why does the microbiome contribute more genes to the hologenome than the host?
A. Protists may have a macronucleus and micronuclei. B. There may be thousands of species of microbes, but only one host. C. Microbes have larger genomes. D. Only part of the host genome contributes to the hologenome. E. Microbes have more numerous, smaller genes than multicellular organisms.