The scientist usually considered the first to see microorganisms, which he called "animalcules", was
A.
Redi.
B.
van Leeuwenhoek.
C.
Pasteur.
D.
Tyndall.
B
Biology & Microbiology
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DNA repair enzymes typically find mismatched base pairs by scanning for ____
a. missing hydrogen bonds b. unsealed nicks in the DNA strands c. Okazaki fragments d. extra hydrogen bonds e. distortions in the DNA double helix
Biology & Microbiology
The letter "A" in the above figure represents
a. pericycle b. endodermis c. primary xylem d. root cortex e. primary phloem
Biology & Microbiology
In temperate-zone lakes, a __________ and a fall
overturn cause vertical mixing of waters and trigger a burst of productivity. Fill in the blank(s) with the appropriate word(s).
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In temperate deciduous forest, light penetration to the ground is greater during summer than during winter
Indicate whether the statement is true or false
Biology & Microbiology