Wings of birds and butterflies have similar functions, but different evolutionary origins. They are
A. physiological structures.
B. analogous structures.
C. phylogenetic structures.
D. homologous structures.
Answer: B
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Snapping division is a hallmark trait of ________ which can be visualized under a microscope by ________
A) Actinobacteria / two adjacent cells linked, appearing as an M dividing into four B) Actinobacteria / one cell appearing as a V dividing into two C) Coryneform bacteria / two adjacent cells linked, appearing as an M dividing into four D) Coryneform bacteria / one cell appearing as a V dividing into two
A genotype refers to
A) the alleles present in an individual. B) expression patterns of certain genes. C) the environmental components of a trait. D) the number of chromosomes that a person has.
What new technique or technology may revolutionize the way in which cell biologists alter the genomes of cells and organisms?
A) genome editing B) homologous recombination C) RNA-mediated interference D) recombinant DNA technology E) next-generation sequencing
Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes?
A) 2:1 B) 1:1 C) 1:2:1 D) 3:1