The animal shown in the illustration is a
a. urochordate.
b. lancelet.
c. sea squirt.
d. tunicate.
e. protostome.
Answer: b
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What will be an ideal response?
In order to work best, enzymes ____
a. always need coenzymes b. randomly grab surrounding molecules c. need low pH d. need high temperatures e. need set environmental conditions, specific for each enzyme
In fruit flies, males are determined by the presence of an X and Y chromosome; females are determined by two X chromosomes. The gene for eye color is located on the X chromosome and is absent from the Y chromosome. The allele for white eyes is recessive and the allele for red eyes is dominant. If a red-eyed male is mated with a white-eyed female, what is the probability that their male offspring will be white-eyed?
A. 100% B. 50% C. 25% D. 0%
Because their host cells have dsDNA genomes, viruses with RNA genomes cannot rely on host cell enzymes for genome replication or mRNA synthesis.
Answer the following statement true (T) or false (F)