If a great volcano blew up and almost everyone nearby was killed, we would say that this was due to a(n) ________ regulating factor
Fill in the blank(s) with correct word
density-independent
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Use the following abstract from Theoretical Population Biology to answer the question
We derive measures for assessing the value of an individual habitat fragment for the dynamics and persistence of a metapopulation living in a network of many fragments. We demonstrate that the most appropriate measure of fragment value depends on the question asked. Specifically, we analyze four alternative measures: the contribution of a fragment to the metapopulation capacity of the network, to the equilibrium metapopulation size, to the expected time to metapopulation extinction and the long-term contribution of a fragment to colonization events in the network. The latter measure is comparable to density-dependent measures in general matrix population theory, though some differences are introduced by the fact that "density dependence" is spatially localized in the metapopulation context. We show that the value of a fragment depends not only on the properties of the landscape but also on the properties of the species. Most importantly, variation in fragment values between the habitat fragments is greatest in the case of rare species that occur close to the extinction threshold, as these species are likely to be restricted to the most favorable parts of the landscape. We expect that the measures of habitat fragment described and analyzed here have applications in landscape ecology and in conservation biology. One measure for the value of the patch was given by the long-term contribution of a fragment to colonization events in the network. How do the properties of a landscape and the properties of a species affect the value of a patch? The value of the fragment depends _____. A) on the properties of the landscape and the properties of the species B) only on the properties of the landscape and not on the properties of the species C) not on the properties of the landscape but only on the properties of the species D) on neither the properties of the landscape nor on the properties of the species
Which of the following are not part of plant defense systems for pathogens?
A. Protein receptors detect a broad class of molecules produced by many pathogens and mount defense mechanisms. B. R proteins inside the plant cells recognize AVR proteins on pathogens. C. Plants reinforce barriers, such as by closing stomata and reinforcing cell walls. D. Cells surrounding the infection site produce reactive oxygen species. E. Plants produce AVR proteins when invaded by a pathogen.
A portion (location) of DNA that encodes a specific protein is a
Examine this image of chromosomes and identify the structural components.
A. kinetochore.
B. centromere.
C. chromatid.
D. chromosome.
E. gene.
What is the -35 consensus sequence for the following sequences?
A) TTGATA B) TATGAT C) TATTAT D) ACAA E) TAGTAT