What embryonic structures are common in all chordates?
A) pharyngeal slits
B) arrector pili
C) gametophytes
D) vertebrae
A
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Turgor pressure involves
a. cell division. b. cell expansion. c. differentiation. d. mitosis.
____ bacteria are found inside the roots of legumes, where they receive _____ from the host plant
a. Thermophilic; water b. Cyanobacteria; minerals c. Nitrogen-fixing; carbohydrates d. Methane-producing; minerals e. Halophilic; carbohydrates
Mycorrhizae are a:
A) mutualistic association between algae and plant roots. B) parasitic association between algae and fungi. C) mutualistic association between plant roots and a fungus. D) parasitic association between animals and fungi.
Ehrlich and Raven hypothesized that if a new defensive trait evolves in a single plant species (or if a new trait to counteract a plant's defenses evolves in an herbivore species)
the appearance of that trait could result in a period of species diversification. Their hypothesis is also referred to as: A. the "diverge and converge" hypothesis. B. the "reverse and diverse" hypothesis. C. the "emit and commit" hypothesis. D. the "merge and diverge" hypothesis. E. the "escape and radiate" hypothesis.