________ are stramenopiles that commonly are found decomposing dead animals in freshwater habitats
A) Brown algae
B) Water molds
C) Cellular slime molds
D) Plasmodial slime molds
Answer: B
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Which of the following is the greatest threat to biodiversity?
A) overharvesting of commercially important species B) introduced species that compete with native species C) pollution of Earth's air, water, and soil D) disruption of trophic relationships as more and more prey species become extinct E) habitat alteration, fragmentation, and destruction
____ is not a component of a cellular membrane.
A. Cholesterol B. Nucleic acid C. Phospholipid D. Protein
The ribosomal E site
a. binds aminoacyl-tRNA. b. binds the peptidyl-tRNA. c. binds the Shine-Dalgarno sequence. d. transiently binds deacylated tRNA. e. binds the mRNA start codon.
Horses and tapirs have a common ancestor, but now look very different. Horses now are grassland animals adapted for grazing on grass and shrubs. Tapirs are jungle animals that live in dense forests and eat fruit, leaves, and aquatic vegetation. Which of the following led to the development of such differences in the two species?
A. selective breeding B. convergent evolution C. DNA hybridization D. natural selection