The time it takes for half of the atoms in a radioisotope sample to decay is called the ____

a. decay time
b. half-life
c. isotopic life
d. release time
e. denature time


ANSWER: b

Biology & Microbiology

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Examine Figure 23.2 in your textbook. If we defined a taxon to include only the extant coelacanths and lungfish but not their most recent common ancestor, it would be a _____ group

A. monophyletic B. paraphyletic C. polyphyletic

Biology & Microbiology

In what sense is genetics the key to all of biology?

What will be an ideal response?

Biology & Microbiology

An organism whose genetic makeup is 50% C-G bonds would have a(n) _________ melting temperature (Tm), compared with an organism with 20% C-G bonds

a. higher b. lower c. equal d. similar

Biology & Microbiology

Actin is a structural subunit of

a. myosin. b. microtubules. c. intermediate filaments. d. microfilaments. e. all of these.

Biology & Microbiology