Which is the smallest unit of an element that
retains the properties of the element?
a. atom
b. compound
c. ion
d. molecule
e. mixture
A
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At a low sugar region of a plant, sugars move from ____ into ____
a. sieve elements; source cells b. sieve elements; sink cells c. xylem; phloem d. phloem; source cells e. the low pressure phloem; the high pressure plant tissue
The endodermis of a root
a. regulates the transport of water and minerals into the vascular system. b. produces root hairs for the absorption of water and minerals. c. produces lateral roots in woody dicotyledons. d. transports starch to parenchyma cells for storage. e. produces starch in the roots of dicotyledons.
Differentiation is the process by which cells
a. mature into larger cells. b. change from one type of muscle to another. c. change to repair injuries. d. turn on all the genomic genes. e. express different subsets of their genes during development..
Areas of the spinal cord appear glistening white
because of a. naked dendrites. b. cell bodies. c. axon endings. d. lack of meninges. e. myelin sheaths of axons.