When two species have overlapping niches and one species is excluded by the other, it is an example of
a. a fundamental niche.
b. competitive inclusion.
c. a realized habitat.
d. intraspecific competition.
e. competitive exclusion.
E
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Gene expression in developing organisms is regulated on several different levels. In many developing animals, regulation of gene expression is influenced by the action of Hox genes. Which of the following regulatory elements is produced by many Hox genes?
A) transcriptional factors B) cell-surface molecules for cell-cell interactions C) signals from maternal cytoplasm, such as bicoid D) mRNA processing factors
Increases in the prey growth rate are followed by
a. Increases in the predator growth rate. b. Decreases in the predator growth rate. c. No change in the predator growth rate. d. The predator growth rate is not affected by the prey growth rate.
Random distribution of individuals in a population occurs when resource availability is ____ and individuals ____ one
another. a. scarce; attract b. clumped; neither attract nor avoid c. random; avoid d. uniform; neither attract nor avoid e. scarce; avoid
Depending on the species, how many stomata are there on a single leaf?
1) Tens to hundreds 2) Hundreds to thousands 3) Thousands to millions 4) All of the above