The cephalochordates possess an atrium that is used to filter microscopic food particles out of the water.
Answer the following statement true (T) or false (F)
True
It is true that the cephalochordates possess an atrium that is used to filter microscopic food particles out of the water.
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How do endophytes differ from endomycorrhizal fungi?
A. Endophytes live within leaves, whereas endomycorrhizal fungi live within roots. B. Endomycorrhizal fungi are beneficial to the plant, whereas endophytes are harmful. C. Endophytes are unicellular, whereas endomycorrhizal fungi are multicellular. D. Endophytes help plants absorb nutrients, whereas endomycorrhizal fungi help plants defend against predators and pathogens. E. Endophytes penetrate into plant cells, whereas endomycorrhizal fungi live within and between plant cell walls.
Gel electrophoresis separates the DNA fragments
according to a. their length. b. their mass. c. their speed of travel through the gel. d. the number of nucleotides in the fragment. e. all of these.
Which of the following skin changes is not associated with growing older?
A. There is less adipose tissue in the subcutaneous layer. B. The number of elastic fibers decreases. C. There are fewer sweat glands for sweating to occur. D. There is an increase in the number of oil glands. E. Pigmented blotches appear on the skin.
Two species are said to be closely related if they
A. Are reproductively isolated from each other. B. Have a shared gene pool C. Possess a common ancestor D. Can interbreed and produce fertile offspring E. Can interbreed but not produce fertile offspring