In which of the following ways is biodiversity declining?
a. the genetic diversity component is declining
b. the species diversity component is declining
c. the ecosystem diversity component is declining
d. biodiversity is declining in all regions worldwide
e. all of these are ways in which biodiversity is declining
E
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Alternative forms of genes are called
(a) homologues. (b) locus. (c) loci. (d) alleles.
A seasonal reaction to inhaled allergens is ________.
A. eczema B. allergic rhinitis C. asthma D. anaphylaxis E. atopic dermatitis
When Darwin covered the tip of a grass seedling with metal foil and then illuminated it from one side, what happened to the seedling?
A. It did not respond to the directional light. B. It waved back and forth. C. It wilted and died. D. It bent away from the directional light. E. It grew toward the light, as expected.
In a population of plants with a diploid number of 12, a new individual appeared with a chromosome number of 24. If this organism could self-fertilize, forming offspring with the same number of chromosomes (24), scientists would consider this an example
of A) sympatric speciation. B) behavioral isolation. C) formation of a hybrid zone. D) reduced hybrid fertility.