What embryonic structures are common in all chordates?
A) pharyngeal slits
B) arrector pili
C) gametophytes
D) vertebrae
A
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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.
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.