Phloem and xylem always lie adjacent to each other in plants. Together, they form which of the following plant structures?

a. leaves
b. meristems
c. vascular bundle
d. epidermis


c. vascular bundle

Biology & Microbiology

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In RNA, the base ____ takes the place of the base thymine

a. deoxyribose b. ribose c. pentose d. guanine e. uracil

Biology & Microbiology

A nonphotosynthetic plant sharing a mycorrhizal fungus with a photosynthetic plant is best described as a  

A.  mutualist. B.  epiparasite. C.  parasite. D.  host. E.  symbiont.

Biology & Microbiology

Bats use high ultrasonic sounds to perceive their environment via a process known as ____

a. sound reflection navigation b. extrasensory perception c. echolocation d. ultralocation e. auditory navigation

Biology & Microbiology

You mate two pea plants that are both AaBb and get a 3:1 phenotype ratio. This suggests

A. crossing-over occurred. B. independent assortment occurred. C. genes A and B are on different chromosomes. D. nondisjunction occurred. E. genes A and B are linked on the same chromosome.

Biology & Microbiology