Mycorrhizal fungi interact with plants at the
A. stomata.
B. seed coat.
C. roots.
D. edge of ponds.
E. cuticle.
C. roots.
Mycorrhizal fungi interact with the roots of many species of plants. They extend the surface area for absorption of water and nutrients and therefore are beneficial to the plant.
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Which one of the following cell types is found only in flowering plants?
A. vessels B. tracheids C. parenchyma D. sieve tubes E. epidermis
A collection of interacting organisms of different species is a(n)
A. ecosystem. B. community. C. population. D. habitat.
A ____ is an extracellular signaling molecule that exerts its effect at very low concentrations.
A. statolith B. protein receptor C. plant hormone D. cytochrome E. phytochrome
Hemophilia is a sex-linked trait. The X^N allele codes for normal blood clotting and the X^n allele codes for hemophilia. What are the genotypes of a carrier female and a normal male?
a. X^N X^n and X^N X^N b. X^N X^N and X^N Y c. X^N X^n and X^N Y d. X^N X^N and X^n Y