Water-conducting cells that have a small diameter and tapered ends are called
A) vessel elements.
B) tracheids.
C) sieve-tube elements.
D) collenchyma cells.
E) companion cells.
B
Biology & Microbiology
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A chromosome that has a centrally-placed centromere is called ____________________
Fill in the blank(s) with correct word
Biology & Microbiology
The success of human populations resulted from ____
a. their ability to solve ecological problems b. a stable climate c. their society d. their hunting ability e. absence of predators
Biology & Microbiology
Who proposed the law of independent assortment?
a. Morgan b. Mendel c. Darwin d. Cuvier e. Flemming
Biology & Microbiology
Four of the five answers listed below are related by a common source. Select the exception
a. glucocorticoids b. sex hormones c. cortisol d. adrenalin (epinephrine) e. mineralocorticoid
Biology & Microbiology