Protists are
a. autotrophic.
b. heterotrophic.
c. unicellular.
d. multicellular.
e. all of these.
Answer: e
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Which of the following DNA strands is complementary to the DNA sequence 5'–ATCGTACG–3'?
A. 5'–ATGCATGC–3' B. 5'–TAGCTAGC–3' C. 3'–ATGCATGC–5' D. 3'–TAGCATGC–5' E. 3'–CGTACGTA–5'
Liquids must absorb energy
What will be an ideal response?
Nitrogen has a higher electronegativity than hydrogen. As a result you would expect that ammonia (NH3) molecules can form ________ with each other.
A. hydrogen bonds B. ionic bonds C. hydrophilic bonds D. covalent bonds E. cohesive bonds
Genetic drift is most likely to be an important evolutionary force in ______.
A. Artificial populations B. Very small populations C. Natural populations D. Very large populations