Mycorrhizal association with plant roots is best described as:
A. detrimental to the roots.
B. only a temporary association dependent on water uptake.
C. a symbiotic relationship between the plant and certain bacteria.
D. a fungus root interrelationship.
E. a kind of fungal parasite on plant roots.
D. a fungus root interrelationship.
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Homologous chromosomes pair with each other during meiosis, but are misaligned. Which of the following is a possible outcome if crossing over occurs?
A. One daughter chromosome contains a gene duplication. B. One daughter chromosome contains a gene deletion. C. Two daughter chromosomes each contain a gene duplication. D. Two daughter chromosomes are normal. E. One daughter chromosome contains a gene duplication, one daughter chromosome contains a gene deletion, and two daughter chromosomes are normal.
A high-resolution video camera is used in which of the following microscopic techniques?
A) immunofluorescence microscopy B) fluorescent staining of cytoskeleton proteins C) computer-enhanced digital video microscopy D) scanning electron microscopy E) transmission electron microscopy
Lizards can control spider populations on Caribbean islands by which density dependent
mechanism(s)?
a. Predation. b. Competition. c. Predation on a common predator. d. Predation and competition. e. Predation, competition, and predation on a common predator.
Some of the unique adaptations of angiosperms include their beneficial relationships with ________ and their relatively ________
A) animals; dominant gametophyte generation. B) animals; rapid fertilization and seed production C) fungi; large sporophyte D) fungi; well-developed vascular system