Giant sequoia trees (Sequoiadendron giganteum) are among the largest and longest-living organisms on Earth. These trees grow in weight by up to 1000 pounds of wood per year. As these trees are growing, they:
A. incorporate CO2 into their biomass (wood,
roots, and needles).
B. are probably a net sink of CO2.
C. generate some CO2 through cellular
respiration.
D. All of the answer choices are correct.
D
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Secondary endosymbiosis occurs when a ____ eukaryote engulfs a ____
a. photosynthetic; photosynthetic prokaryote b. photosynthetic; non-photosynthetic prokaryote c. photosynthetic; non-photosynthetic eukaryote d. non-photosynthetic; photosynthetic prokaryote e. non-photosynthetic; photosynthetic eukaryote
What are the hairlike filaments used by bacteria to stick to other cells?
a. Actin filaments b. Flagella c. Microtubules d. Pili e. Cilia
A thick filament consists of
A) actin molecules. B) myosin molecules. C) actin and myosin molecules.
Prokaryotes split into two lines early in the history of life. The differences are so fundamental that they are assigned to two different domains, the ________ and the Bacteria.
Fill in the blank(s) with the appropriate word(s).