Erosion of soils is of major concern throughout the world and happens mostly because of what factor?
A. Soils are exposed and not covered by plants.
B. heavy rainfall
C. Soils are exposed to winds.
D. Soils are not kept fertilized.
E. Soils are frequently flooded.
A. Soils are exposed and not covered by plants.
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Inbreeding increases the likelyhood that an individual will become homozygous for any given gene. Inbreeding may have negative consequences with regard to recessive alleles. The diagram above shows inbreeding between _________ which could lower the fitness of the homozygote. This lowering of fitness because of inbreeding is called __________.
A. siblings; inbreeding depression.
B. cousins; inbreeding depression.
C. siblings; puma concolor cory.
D. cousins; genetic drift.
E. siblings; sexual selection.
________ is the ability to distinguish two objects that are close together as separate. When using a light microscope, this ability is determined by ________.
Fill in the blank(s) with the appropriate word(s).
The primary consumer is
a. the second link in a food chain. b. an herbivore. c. an animal. d. eaten by a carnivore. e. all of these.
Enzymes known as lyases participate in ________ reactions
A) anabolic B) catabolic C) both anabolic and catabolic D) neither anabolic nor catabolic E) oxidation-reduction