In moss, _____ produce sperm.
a) protonemata
b) antheridia
c) archegonia
d) embryos
e) sporangia
Ans: b) antheridia
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An organism whose genetic makeup allows it to produce more offspring than another of its species is said to have greater
(a) fitness. (b) evolution. (c) foraging. (d) selection.
Adenoviruses are a frequent cause of acute upper respiratory tract infections in humans. Adenoviruses are non-enveloped and their capsid contains a "fiber" protein that is analogous in function to the spike glycoproteins of HIV. Which of the following would be ACCURATE about an adenovirus that has a mutation in its fiber protein gene?
A. The virus would still cause upper respiratory tract infections in humans but at a slower rate. B. Because it has a defective fiber protein, it will now have a broader host range. C. It would not be able to cause disease in humans. D. It would be able to infect humans normally, but would not be able to replicate its genome. E. It would be able to infect humans normally, but would not be able to release new adenoviruses from the human cells.
Sea turtles are likely to die when they are young, but have a good chance of surviving once they reach
large size. Which survivorship curve best fits them?
a. Type I, which is graph A b. Type II, which is graph B c. Type I, which is graph C d. Type III, which is graph C e. Type III, which is graph A
The ____ are a group of parasitic fungi that are killing amphibians around the world.
A. chytrids B. ascomycetes C. basidiomycetes D. glomeromycetes E. zygomycetes