Which of the following statements concerning mycorrhizae is FALSE?
a. They are symbiotic associations between a fungus and a plant root.
b. They increase the uptake of nutrient minerals by the plant.
c. Arbuscular mycorrhizae are extracellular.
d. Endomycorrhizae are intracellular.
e. Members of the Glomeromycota may be involved.
C
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Secondary immune responses upon a second exposure to a pathogen are due to the activation of _____
A) memory cells B) macrophages C) stem cells D) B cells E) T cells
A gene that produces multiple effects is called
a. a multiple allele. b. an autosome. c. an epistatic gene. d. a pleiotropic gene. e. an incompletely dominant gene.
Kansas and Pennsylvania are approximately at the same latitude. Yet why are the potential natural communities in Kansas mostly grassland and in Pennsylvania mostly temperate forest?
A. different vegetation due to different seed banks B. different temperatures C. different levels of moisture D. different altitudes E. different soil texture and pH levels
A large number of antifungal agents are available for treating fungal infections
Indicate whether the statement is true or false