Net primary productivity cannot be measured in aquatic ecosystems
Indicate whether the statement is true or false
FALSE
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A researcher discovers a new, single-celled bacterium very similar to Thiomargarita namibiensis. At first he is confused because this organism is quite large compared to other bacteria
He also knows that because of diffusion, most bacterial cells don't exceed 1m in size. What might the researcher notice about the internal structure of his new bacterium? (Select all correct choices.) A. It contains several membrane-bound organelles, facilitating the diffusion of molecules. B. It contains several large histones, facilitating the diffusion of molecules. C. It is completely filled by cytoplasm, limiting the distance molecules need to diffuse. D. It contains a large vacuole, limiting the distance molecules need to diffuse.
Phytochrome is a light receptor that influences:
A. stomata opening and closing B. leaf drop C. stem elongation D. active transport in cell membranes E. flowering
A nephron____
a. is a kidney tubule b. replaces the blood c. forms feces
d. connects the kidneys to the bladder e. is the functional unit of the kidney
Which letter(s) indicate(s) the process during which oxygen is consumed?
a. A
b. B
c. C
d. D and E