A sorus is
a. a fern spore.
b. the fern gametophyte.
c. an egg-producing structure.
d. where the sperm are produced.
e. a collection of sporangia.
Answer: e
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Cell shapes are largely determined by:
A. cytoskeletal protein networks in the cytoplasm. B. adhesion proteins that assemble at cell surfaces. C. a mesh of proteins and polysaccharides in the extracellular matrix. D. cytosolic proteins that assemble into structures called cellular junctions. E. All of these choices are correct.
Marine teleost fishes deal with the osmotic stress of living in seawater mainly by ____
a. active transport of ions into the body through the gills b. excreting nitrogenous wastes through their kidneys as urea c. active transport of ions out of the body by chloride cells d. excreting excess salt through the actions of specialized salt glands in their heads e. maintaining high levels of urea and trimethylamine oxide in body fluids
What is the process by which plants capture energy from the sun and store it in organic molecules?
A. Photosynthesis B. Heterotrophy C. Autotrophy D. Biofuel production E. ATP synthesis
Describe how mutations can lead to whole populations of bacteria becoming resistant to certain antibiotics
What will be an ideal response?