Within bryophytes, the eggs are produced in

A. archegonia.
B. tracheids.
C. antheridia.
D. sporangia.


Answer: A. archegonia.

Biology & Microbiology

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Recombinant DNA technology can be used to make which of the following?

A)Vaccines B)Human hormones C)Drugs D) all of the above

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Which hypothesis states that life developed from nonliving matter?

a. abiotic evolution b. natural selection c. organic evolution d. chemical evolution e. inorganic evolution

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The receptors found on the cells of the innate immune system are specific for structures shared by classes of microbes ("molecular patterns"), e.g., LPS, mannose, N-formyl methionyl

a. true b. false

Biology & Microbiology

The major weakness of Charles Darwin's theory during his lifetime was the:

A) fact that, at certain points in embryonic development, diverse species all have structures known as pharyngeal gill slits. B) fact that populations do not promote competition but rather promote sharing. C) lack of a mechanism to explain how traits were passed to offspring intact when most believed inheritance worked through blending. D) lack of variation in natural populations.

Biology & Microbiology