Gnetophytes are different from other gymnosperms in that gnetophytes have vessel elements

____________________ Indicate whether the statement is true or false.


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Biology & Microbiology

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Which of the following structures would be the best choice as a biological indicator to test autoclave operations?

A. Endopores formed by Geobacillus (Bacillus) stearothermophilus B. Cysts formed by Azotobacter species C. Microcysts withing the fruiting bodies of myxobacteria D. Dormant spores in the conidia of Streptomyces species

Biology & Microbiology

The energy base on mud flats is:

a. phytoplankton. b. detritus. c. marsh plants. d. algae. e. chemosynthesis.

Biology & Microbiology

Dalton’s law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the pressures

of the individual gases. Indicate whether the statement is true or false.

Biology & Microbiology

Regions of a specimen with higher electron density scatter ________ electrons and, therefore, appear ________ in the image projected onto the screen of a transmission electron microscope.

A. more; darker B. more; lighter C. fewer; lighter D. fewer; darker

Biology & Microbiology