Explain how tropism affects plants' growth? Tropisms can cause plants to grow either away or towards external stimuli.
Tropisms produce chemicals that cause plants to only grow taller.
Tropisms produce chemicals that only affect the growth plants' roots.
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What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

Describe the relationship between isotonic solutions, equilibrium, and water movement into and out of a cell.

14) whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.