Regions on a plant stem that can give rise to new shoots or roots are known as ____
a. bundles
b. internodes
c. flowers
d. cotyledons
e. nodes
ANSWER: e
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Both Lycopodium and Equisetum have strobili, roots, and rhizomes. What did you learn in this exercise that enables you to distinguish these two plants?
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Which of the following is not true of the outer membrane?
A. Gram-positive bacteria have an outer membrane. B. The lipid portion of the lipopolysaccharide layer is termed endotoxin. C. Porins create channels through the outer membrane. D. The innermost layer is a phospholipid bilayer. E. The uppermost layer is made of lipopolysaccharide.
What fills the space between meninges, a central canal in the spinal cord, and brain ventricles?
a. blood b. plasma c. interstitial fluid d. unmyelinated axons e. cerebrospinal fluid
Which of the following is considered to be a strong base (alkali)?
A) HCl ? H+ + Cl- B) NH3 + H+ ? NH4+ C) H2CO3 ? HCO3- + H+ D) NaOH ? Na+ + OH-