__________ are heterotrophs that grow as a mesh of absorptive filaments. Some are plant pathogens. Fill in the blank(s) with the appropriate word(s)
Water molds
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Which statement about protists is true?
a. Protists conduct about one-fourth of the world’s photosynthesis. b. Protists must be converted and cannot be consumed directly. c. Protist pathogens harm plants but not humans. d. Protists serve as primary producers on land.
Earth formed___years ago, and life first appeared about___years ago
Fill in the blank(s) with the appropriate word(s).
In fast-growing Escherichia coli cells, multiple replication forks of genomic DNA allows binary fission to occur before the genome has been fully duplicated
Indicate whether the statement is true or false.
________ is directional growth responses of plants to a unidirectional source of light.
A. Dormancy B. Phototropism C. Thermotropism D. Gravitropism E. Thigmotropism