How would you describe the body of a fungus?
A. tiny threadlike septa collectively make up the mycelium
B. tiny threadlike mycelia collectively make up the septa
C. tiny threadlike mycelia collectively make up the hypha
D. tiny threadlike hyphae collectively make up the mycelium
E. tiny threadlike mycelia collectively make up the dikaryote
D. tiny threadlike hyphae collectively make up the mycelium
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Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers from 92-100. Therefore, which of the following can be true?
A) Molybdenum atoms can have between 50 and 58 neutrons. B) Molybdenum atoms can have between 50 and 58 protons. C) Molybdenum atoms can have between 50 and 58 electrons. D) Isotopes of molybdenum have different numbers of electrons.
Despite the differences between eukaryotic and prokaryotic cells, prokaryotes have proteins that are distantly related to eukaryotic actin filaments and microtubules. What is likely to be the most ancient function of the cytoskeleton?
(a) cell motility (b) vesicle transport (c) membrane support (d) cell division
In which tissue would you look for cells that function in point-to-point communication?
(a) connective. (b) epithelial. (c) muscle. (d) nervous.
The movement of oxygen through the aquatic plant may depend on
A. differences in the water potential of different tissues. B. larger lenticels. C. negative pressures created by transpiration. D. aquaporins. E. osmotic absorption by the roots.