You hang a microscope slide from a submerged, L-shaped PVC pipe in lake water that is 2 feet deep. The slide hangs 6 inches below the surface of the water and remains there for eight weeks. When you remove it and bring it to your lab for observation, you
see that algae, bacteria, and even some fungi have colonized the slide. You determine that you are looking at a(n)
A) biofilm.
B) community of eukaryotes.
C) biological weapon.
D) endotoxin.
Answer: A
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A group of three mRNA nucleotides that translate to an amino acid is called a(n)
A. dictionary. B. initiator. C. codon. D. uncodon.
Describe how phytochrome is used to determine plant spacing.
What will be an ideal response?
What is the event that begins prometaphase?
a) the dissolution of the nuclear envelope b) the reappearance of the nucleolus c) the disappearance of the nucleolus d) the completion of the connection of chromosomes to the spindle e) the complete compaction of the chromosomes
If there is only random mating in a population and no other selection pressures acting on the population, the expected outcome will be that _________
a) allelic frequencies will remain the same but the genotype distribution will change. b) genotypic frequencies will remain the same but the allelic frequencies will change. c) both the genotypic and allelic frequencies will change. d) both the genotypic and allelic frequencies will stay the same. e) No prediction about genotypic and allelic frequencies can be made from one generation to the next