Describe the factors that affect species richness. Describe the parameters that would probably result in
an environment with the greatest possible species richness. Knowing what you do about the tropical
rain forests, do they meet these expected parameters? What will be an ideal response?
Concepts to Consider: Species richness increases with the number of potential ecological niches and
the area of the habitat, but is inversely related to the amount of geographical isolation and the
environmental stress of the habitat; species richness is greater in ecotones due to the edge effect;
species richness is greater in old, stable communities. Rain forests are stable, old, typically continental
habitats, and have very high species richness.
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At puberty, an adolescent female body changes in both structure and function of several organ systems, primarily under the influence of changing concentrations of estrogens and other steroid hormones. How can one hormone, such as estrogen, mediate so many
effects? A) Estrogen is produced in very large concentration by nearly every tissue of the body. B) Each cell responds in the same way when steroids bind to the cell surface. C) Estrogen is kept away from the surface of any cells not able to bind it at the surface. D) Estrogen binds to specific receptors inside many kinds of cells, each with different responses. E) Cells metabolize steroids in different ways, producing by-products that stimulate tRNA production.
The human vestibular system is made up of:
A. the malleus, stapes, and incus B. two statocyst chambers and three semicircular canals C. the cochlea D. the pinna and the tympanic membrane
The measure of differential survival and reproductive success is termed _____________________
Fill in the blank(s) with correct word
Which group of animals would contain species that are parasitic to humans?
1.cnidarians 2.mollusks 3.flatworms 4.