In the Piedmont of North Carolina, the climax following succession on abandoned fields is characterized by a community of:
A) herbaceous species.
B) shrubby species.
C) pines.
D) hardwood tree species.
Ans: D) hardwood tree species.
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Salt marsh plants play an important ecological role in
a. recycling nutrients. b. stabilizing sediments. c. filtering run-off from coastal areas. d. habitat for small animals. e. all of the above
Latency is associated with which of the following?
a. adenoviruses b. lysogenic pathways c. lytic pathways d. DNA viruses e. RNA viruses
The law of segregation states that
A) when two identical alleles come together, complete dominance occurs in terms of phenotype. B) genes for different traits assort independently of each other during the formation of egg and sperm. C) genes separate from each other during gamete formation so that each sperm and egg receive only one allele from each pair. D) when different alleles for the same trait come together, one allele will be recessive to another. E) different alleles for the same gene occupy unique loci on sister chromatids.
The parents in the figure shown are carriers of a genetic disorder. Based on the Punnett square, the allele that causes the disorder must be
a. autosomal. b. sex-linked. c. dominant. d. incompletely dominant.