The most widely accepted formal classification of protists assigns them to

A. the kingdom Protista.
B. domain Eubacteria
C. five different supergroups.
D. domain Archaea.


Answer: C

Biology & Microbiology

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Which of the following would most likely result in a bottleneck event, why?

A. A small population of geese migrates and joins a large nesting flock of the same species. This is a bottleneck event because the small population do not bring in any new alleles to the large flock. B. A mutation occurs in an individual poison ivy plant, doubling the number of seeds it produces. This is a bottleneck event because even though the mutation is passed down to the next generations, it does not change the frequency of any other alleles in the population. C. A hurricane blows through a coastal swamp, killing 98% of the snails in a population. This is only a bottleneck event if there is a change in the number of alleles in the population. The 2% of the snails remaining still have the same allele frequencies as the total population. D. A large population of broomsedge grass in a field is determined to be in Hardy-Weinberg equilibrium. This is a population bottleneck event because there is no random mating going on which increases the likelyhood that there will be a decrease in the number of alleles in the population. E. A small population of ducks with red beaks join a large population of ducks that have no red beaks. After 5 generations the number of ducks with red beaks is reaching 50% in the population. This is a bottleneck event because there is a decrease in the number of ducks without red beaks.

Biology & Microbiology

Which of the following is a difference between prokaryotes and eukaryotes?

a. In prokaryotes, the DNA is sequestered inside the nucleus; in eukaryotes, it is in the cytoplasm. b. In eukaryotes, transcription starts with a final copy of mRNA; in prokaryotes, there is pre-mRNA, and it must be edited to make the final transcript. c. In eukaryotes, translation only occurs after transcription; in prokaryotes, they happen simultaneously. d. In prokaryotes, there are exons and introns; in eukaryotes, there are neither of these.

Biology & Microbiology

When larval or juvenile characteristics are retained in the adult stage, it is known as:

a. paedomorphosis. b. allometry. c. adaptive radiation. d. stasis. e. preadaptation.

Biology & Microbiology

An ecologist is studying the painted turtle population in a small pond. At the beginning of the year, there are 100 individuals. Over the course of a year, 40 turtles are born and 60 die. There is no migration

What is the birth rate per year for this population? A) 20 B) 60 C) 40 D) 0.4 E) 0.6

Biology & Microbiology