Laboratory simulations provide indirect evidence
that organic compounds such as __________ and
__________ self-assemble spontaneously under
conditions like those thought to have prevailed on the
early Earth. Fill in the blank(s) with the appropriate word(s).
Answer: amino acids; nucleotides
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The term homeostasis refers to the ability of:
A. molecules to undergo net movement by diffusion. B. the cell to seek out an optimal environment. C. the plasma membrane to control what enters a cell. D. the cell to control and maintain its internal environment.
Which one of the following is the area of the brain where sound waves are processed?
A. visual cortex B. auditory cortex C. cerebellum D. somatosensory cortex
Which of the following statements about chlorophyll is correct?
A. It appears green because it absorbs light in the green light spectrum. B. It reflects all colors in the light spectrum except green. C. It reflects light in the green light spectrum. D. It reflects high-energy electrons. E. All of the choices are correct.
A cross between two pea plants produces a population of 732 purple and 268 white plants. What is the genotype and phenotype of the parents that produced this population?
A. both parents heterozygous purple B. one parent homozygous purple, second parent homozygous white C. one parent heterozygous purple, second parent heterozygous white D. one parent heterozygous purple, second parent homozygous white E. one parent homozygous purple, second parent heterozygous white