Which of the following is an example of the
Red Queen hypothesis?
a. spiders evolve resistance to a viral disease;
the virus becomes more virulent
b. dogs evolve characteristics that are selected
by humans
c. dinosaurs lack the adaptations to survive
predation of their eggs by small mammals
d. horses evolve from a five toed animal to
one toe
e. cats and cows separately, but for similar
purposes, evolve scratchy tongues
A
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To analyze genetic variation in populations, one approach is to consider the frequency of alleles. When calculating an allele frequency for a diploid species, how many copies of an allele are present?
A. 1 B. 2 C. 3 D. 4 E. 5
In which of the following laws did Mendel assert that one trait in a heterozygote will conceal the presence of another trait for the same characteristic?
a. law of dominance b. law of segregation c. law of dependent assortment d. law of incomplete dominance
According to Watson and Crick's model, DNA consists of two strands of nucleotides that are antiparallel. What does this mean? What evidence supports the antiparallel nature of the strands?
What will be an ideal response?
According to the latest research, which of the following is the best description of the first eukaryote?
a. It lacked a nucleus, but contained a mitochondrion and a chloroplast. b. It contained a nucleus, a mitochondrion, and a chloroplast. c. It contained a nucleus and a chloroplast, but not a mitochondrion. d. It contained a nucleus and a mitochondrion, but not a chloroplast.