The digestion of which class of foods begins in the mouth?
a. carbohydrates
b. proteins
c. lipids
d. amino acids
e. nucleic acids
A
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Which of the following would most likely result in a bottleneck event?
A. A small population of geese migrates and joins a large flock of the same species. The two groups subsequently begin interbreeding. B. A mutation occurs in an individual poison ivy plant, doubling the number of seeds it produces. The mutation is inherited by future generations. C. A hurricane blows through a coastal swamp inhabited by an apple snail population. The hurricane drastically changes the hydrology of the swamp, killing 98% of the apple snails. D. A population of broomsedge grass is studied and determined to be in Hardy-Weinberg equilibrium. E. Two populations of lizards were separated for many years by a river. The river's course has been diverted and migration between the two lizard populations can now occur.
What is the name for a horizontal stem system?
a. Ribosomes b. Internodes c. Nodes d. Rhizomes
Scientists attempt to avoid bias by which of the
following?
a. designing quantative experiments b. experiments repeated by other scientists c. publicly publishing their results d. controlled as many variables as possible e. all of these are attempts to avoid bias.
Commercial inorganic fertilizers have greatly increased agricultural productivity. What is an advantage of using inorganic rather than organic fertilizers?
A) It is easier for plants to absorb nutrients in an inorganic form. B) Nutrients are released faster from inorganic fertilizers. C) Inorganic nutrients bind more tightly to soil particles. D) Inorganic fertilizers increase the water-holding capacity of the soil.