Specialized parenchyma cells, known as ________ cells, occur along with sieve-tube members.
Fill in the blank(s) with the appropriate word(s).
companion
Specialized parenchyma cells, known as companion cells, occur along with sieve-tube members.
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The glycocalyx of a eukaryotic cell is
A. a protective mechanism against osmotic lysis. B. mostly polysaccharides. C. also called the cell wall. D. the site where many metabolic reactions occur. E. composed of many diverse proteins.
Which structures are the primary cellular sites for the production of polypeptide chains?
a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. smooth endoplasmic reticula
The KN-1 gene in maize is normally expressed
a. in primary meristems, where it initiates the process of differentiation. b. in apical meristems, where it maintains the undifferentiated state. c. in apical meristems, where it initiates the process of differentiation. d. in primary meristems, where it maintains the undifferentiated state. e. in lateral meristems, where it initiates the process of secondary growth.
Are all nuclei the same size (diameter)?
a. Yes b. No