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23 Cards in this Set
- Front
- Back
Darwin and Wallace were the first men to: |
Offer natural selection as a mechanism of evolution |
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The early Earth reducing atmosphere is thought to have lacked which of the following gases? |
O2 |
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Study of the origin of life has resulted in the breakdown of cellular development into overlapping stages, beginning with the synthesis of precursor molecules for the synthesis of nucleotides and amino acids and ending in polymers enclosed in membranes acquiring cellular properties. Which of these stages were a focus of study for Miller and Urey in their FIRST experiment? |
Stage 1: Nucleotides and amino acids were produced prior to the existence of cells. |
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The major opposition to the extraterrestrial hypothesis is... |
Most organic carbon molecules would have been destroyed while falling through Earth's atmosphere. |
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Protobionts are thought to be the first nonliving structures that evolved into living cells. A critical characteristic of a protobiont that is found in both modern day prokaryotes and eukaryotes is: |
A boundary membrane that separates external from internal environments. |
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The term evolution describes: |
Heritable changes in characteristics of a population from one generation to the next. |
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An important message from the work of Thomas Malthus that influenced Charles Darwin was: |
Only a fraction of any population will survive and reproduce. |
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The Hardy-Weinberg equation stats that p2+2pq+q2 = 1; the genotype frequency of heterozygotes is represented by |
2pq |
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Below is a list of phenomenon that can occur in a population, which of these would violate the conditions for the Hardy-Weinberg equation? A. The population is large. B. Mating is nonrandom. C. Migration does not occur between different populations. D. Natural selection is not occurring. E. No new mutations arise. |
B. Mating is nonrandom |
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What would be the frequency of pink flowers in a population where the allele frequency of CR is 0.4 and the population is in Hardy-Weinberg equilibrium? Assume that CR CR is red, CRCW is pink, and CwCw is white. A. 0.04 or 4% B. 0.16 or 16% C. 0.2 or 20% D. 0.8 or 80% E. 0.48 or 48% |
0.48 or 48% |
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White coat color is recessive to black coat color in mice. If by molecular analysis you observe that the recessive allele is present at a frequency of 25% in a population of mice, what do you predict the frequency of the dominant allele to be in this population? A. 0.94 B. 0.25 C. 0.56 D.0.38 E. 0.75 |
0.75 |
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Define prezygotic |
Before fertilization of egg |
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Define: Cladogenesis |
Creating branches |
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Define: Allopatric speciation |
Geographic isolation |
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Define adaptive radiation |
Single species evolves into many descendants that differ in habitat, form, or behavior |
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Define Hybird zones |
Where populations can interbreed |
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Define sympatric speciation |
No physical barriers |
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A group of individuals that can interbreed in nature and produce viable offspring would be considered to be a species according to the: |
Biological species concept |
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During spring time in Maine, male moose often enter a cow pasture and begin calling to the female cows. The moose may even try to mount the female but the male genitalia do not fit properly inside the female genitalia. This is an example of |
Mechanical isolation |
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If goats are crossed with sheep, embryos will form but cease development and spontaneously abort. This is an example of: |
Hybrid inviability |
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Approximately 3.5 million years ago the Isthmus of Panama formed. This new landmass severed the connection between the Pacific Ocean and the Caribbean Sea. An ancestral fish population (porkfish) was split in two by this event; the two populations no longer interbreed and are two distinct species. This type of speciation is called: |
Allopatric speciation |
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Sympatric speciation differs from allopatric speciation because the sympatric speciation: |
Temporal factors may arise without geographic isolation occurring and polyploidy may arise |
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The phenomenon in which one region of the body grows faster than another among different species is called... |
Paedomorphosis |