Annelids are characterized by serial ________.
What will be an ideal response?
Segmentation
segmentation
segments
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As described in your textbook, the concepts of metapopulation biology and island biogeography provide a valuable framework for thinking about the optimal design of nature reserves
A major goal of reserve design is to maximize the number of species living in reserves, and a long-standing debate in conservation biology concerns the question of whether it is better to have one large reserve or several small reserves. Reference: Ref 46-3 You are working for a group that lobbies for conservation of chameleon (a type of lizard) diversity in tropical rainforests. You are asked to describe what type of land reserve you would like to have set aside for the long-term conservation of chameleons. For which of the following would you advocate? A. one large reserve because it will hold all the species of chameleons B. one large reserve because it will hold more insects that are food for chameleons C. several small reserves, the total area of which is greater than the reserve area described in answer a, because it will hold more species of chameleons D. several small reserves because chameleons are relatively small and do not need that much space
A northern blot could be used best to monitor control of gene expression at which of the following steps?
A. DNA methylation B. nucelosome acetylation C. protein ubiquitination D. transcription
For the relative proportions of alleles and genotypes in successive generations to stay the same, which condition must
be met for the population? a. There can be no natural selection. b. A population must not be very large. c. There can only be mating between relatives. d. A population can only have some migration. e. A population can have only occasional matings.
When toxic chemicals enter the environment, there is a good chance that they will fid their way into food chains and
food webs. Such was the case with DDT, a chemical that was used to control mosquitoes before it was banned in 1972. The processes that proved DDT to be so dangerous could be manifested in other substances like heavy metals, other pesticides and radioactive isotopes. Use the example of DDT to explain why these chemicals can have such far-reaching effects, making sure you use the terms bioaccumulation, persistence, and biological magnification. What will be an ideal response?