Modern systematics constructs clades and evolutionary relationships on the basis of
A) genetic similarities.
B) mating behaviors.
C) whether or not an organism reproduces sexually.
D) anatomical similarities.
E) fossils.
A
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The ________ is comprised of the fluid portion of the cell and contains the organelles.
Fill in the blank(s) with the appropriate word(s).
________ , also known as "jumping genes," are examples of mobile DNA elements.
Fill in the blank(s) with the appropriate word(s).
All of the following statements are true about restriction enzymes EXCEPT
A. hundreds of different ones have been isolated and purified. B. they are made by bacteria and viruses. C. each enzyme cuts DNA at a different specific base sequence. D. they produce single-stranded complementary ends that can join to two different DNA strands by complementary base-pairing.
Which kingdom contains nonphotosynthetic multicellular organisms that digest their food externally?
A. Animalia B. Archaea C. Plantae D. Fungi E. Protista