All forms of life function optimally at a pH of 7
Indicate whether the statement is true or false
FALSE
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Enzymes function to:
A. react with other enzymes to form a product. B. catalyze chemical reactions. C. transport molecules and ions across membranes. D. regulate messages between cells.
The Janzen-Connell hypothesis:
A. proposes that interactions with hostspecific pathogens, herbivores or seed predators play a role in decreasing plant diversity. B. was based on the observation that seeds often suffer lower rates of herbivory when growing directly beneath a parent tree. C. was supported by research that demonstrated that seeds that disperse far from their parent tree will escape from seed predators. D. was supported by data that indicated that seed and seedling mortality was not density dependent, thus favoring more common species. E. indicates that rare plants do not survive well in the tropics.
Many different structures make up a cell and have unique functions. Each cell structure is associated with a critical function in the cell. These pairings include
_____ microfilaments; cytoskeleton. _____ lysosomes; protein synthesis. _____ nucleus; DNA replication. _____cell membrane; barrier between the cell and the external environment _____ Golgi apparatus; modification, processing, and sorting of macromolecules.
Wings of birds and butterflies have similar functions, but different evolutionary origins. They are
A. physiological structures. B. analogous structures. C. phylogenetic structures. D. homologous structures.