Determining the functional nature of a microbial community by analysis of bulk DNA samples extracted from environmental samples may be misleading for all of the following reasons EXCEPT
A. the DNA obtained can depend on the extraction method used.
B. some of the DNA may be from non-functional entities such as spores.
C. DNA is of little use in identifying unknown microbes.
D. some of the DNA recovered may be from non-living organisms.
Answer: C
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Which of the following is a source of genetic variation in a population caused by epistatic interactions between genes?
A) Additive genetic variance B) Dominance variance C) General environmental effects D) Interaction variance E) Maternal effect
A cell that contains eight chromosomes and is undergoing mitosis will produce ____ daughter cell(s); each daughter cell will contain ____ chromosomes.
A. two; eight B. two; four C. four; four D. one; eight
Fragrance and other flower traits not directly related to reproduction are a result of __________ with animal pollinators.
Fill in the blank(s) with the appropriate word(s).
An individual described as heterozygous has a _____.
A) pair of identical dominant alleles B) pair of nonidentical alleles C) pair of identical recessive alleles D) phenotype that clearly indicates the genotype