What key conclusion did Riesch and Schlupp draw from the life history data of the Atlantic mollies?
A. More energy is invested in producing larger offspring when the populations live in environmentally stressful habitats.
B. The populations exposed to H2S are able to use the toxic molecule for metabolic energy.
C. Genetic regulation in the species results in production of equal sizes of offspring whether exposed to stressful environments or not.
D. More energy is invested in producing many more offspring when the populations live in environmentally stressful habitats.
E. The populations are only able to survive and reproduce when in stressful environments of either darkness or H2S.
A. More energy is invested in producing larger offspring when the populations live in environmentally stressful habitats.
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The defining characteristics of the phylum Arthropoda are:
A. jointed legs, ecdysis, and an exoskeleton B. antennae, six legs, and mandibles C. compound eyes, book lungs, and the hemocoel D. Malphigian tubules, ommatidia, and tagmata E. spiracles, cephalothorax, and proboscis
Cheetahs are cats native to the African continent. The population numbers have been drastically reduced in the past. Also, the allele frequencies of the cheetah populations are very similar, with little or no differences among populations. Individuals are virtually genetically identical. The loss of genetic variation in cheetahs is likely due to
1.a founder effect 2.a bottleneck effect 3.sexual selection 4.chance
The appendicular skeleton is attached to what?
What will be an ideal response?
What is the most logical sequence of steps for splicing foreign DNA into a plasmid and inserting the plasmid into a bacterium?
I. Transform bacteria with a recombinant DNA molecule. II Cut the plasmid DNA using restriction enzymes (endonucleases). III. Extract plasmid DNA from bacterial cells. IV. Hydrogen-bond the plasmid DNA to non plasmid DNA fragments. V. Use ligase to seal plasmid DNA to non plasmid DNA. A) II, III, V, IV, I B) III, II, IV, V, I C) III, IV, V, I, II D) IV, V, I, II, III