What technical advance allowed Walther Flemming and other scientists of his generation to better understand the stages of mitosis and meiosis?

A. the ability to obtain single cells
B. the ability to slice cells thinly
C. microscopes with two eyepieces
D. microscopes with high-quality oil immersion lens
E. electron microscopes


D

Biology & Microbiology

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A key concept in evolution is that all mutations are

A) random. B) neutral. C) deleterious. D) either deleterious or beneficial.

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Transformed cells contain

(a) transformants. (b) new genes. (c) bacteria. (d) none of these choices.

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Obligate mutualisms: Lichens

What will be an ideal response?

Biology & Microbiology

Which DNA sequence below would be a palindromic sequence?

a. AGCGCT b. AGCAGC c. AAAGGG d. ACACAC e. AGTCGT

Biology & Microbiology