In seed plants, which develops into a female gametophyte?

a. megaspore
b. microsporangium
c. microspore
d. megasporangium
e. sporophyte


ANSWER: a

Biology & Microbiology

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What is the correct order of structures in the electrical excitation pathway that generates a normal heartbeat? 

Refer to the diagram below.


A. 1, 2, 3, 4, 5, 6
B. 3, 6, 2, 4, 1, 5
C. 6, 3, 2, 4, 5, 1
D. 1, 5, 4, 2, 3, 6
E. 2, 5, 1, 4, 6, 3
F. 3, 2, 6, 4, 5, 1

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On his voyage, Darwin discovered fossils of the extinct armored glyptodonts and noticed the similarity they shared with modern:

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Which component of fat can be metabolized for the production of ATP?

A) amino acids B) monosaccharides C) nucleic acids D) glycerol

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