Type II survivorship curves
a. are characteristic of humans and elephants.
b. indicate a fairly constant rate of death at all ages.
c. indicate a high mortality rate in the very young.
d. are characteristic of species in which most
individuals live a relatively long life and die of
old age.
e. are typical of species with high biotic potentials.
Answer: b
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Diatoms have a special problem:
A. because their + and - mating strains are nonmotile and have to be dispersed by currents B. because their heavy siliceous shells impede conjugation C. because they must await a chemical signal from a fish before they can become mobile and search for mating partners D. because their two halves fit like the lid and body of a pillbox and on repeated cell divisions the half that is overlapped gets progressively smaller E. because the gametes experience difficulty in exiting the overlapping halves of their siliceous shells
Processed pseudogenes are useful for testing Darwin's theory of descent with modification because they ________
A) can be utilized for examining phylogenetic relationships among asexually reproducing organisms B) demonstrate phylogenetic relationships of divergence because they do not accumulate mutations C) accumulate mutations at a constant rate, and thus older processed pseudogenes should be shared by a greater variety of species D) are distributed in organisms that are found in similar environments
Which cell structure does Neisseriae gonorrhoeae use to attach and enter tissue?
a. cell wall components b. capsules c. flagella d. fimbriae
The monomer of a nucleic acid is called a (nucleoside/nucleotide/base)
What will be an ideal response?