The proposed common ancestor to all animals, shown at the left of the evolutionary tree, was a
A. bacterium.
B. protist.
C. plant.
D. None of the answer choices is correct.
E. fungus.
B. protist.
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What description applies to a disease-causing organism that can spread from one organism to another?
A) contagious B) infectious C) parasitic D) microscopic
Where does production of sexual spores in ascomycetes occur?
a. in sporangia b. in zygospores c. in asci d. in conidiophores
The cell wall ____.
A. provides physical support for plant cells B. controls the transport of materials out of the cell C. replaces the plasma membrane in plant cells D. is found in all eukaryotes E. prevents the transport of toxic substances into the plant cells
Insulin and many other hormones are protein molecules. Based on your knowledge of transport processes, you can say that cells that secrete these types of hormones do so through:
A) pinocytosis. B) receptor-mediated endocytosis. C) passive diffusion. D) exocytosis. E) facilitated diffusion.