Water may be lost in the form of liquid from the surface of leaves through a process known as
A. mesophyll adhesion.
B. guttation.
C. phloem loading.
D. cohesion.
E. aeration.
Answer: B
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Peptidoglycan forms sheets that stiffen the cell walls of bacteria. How is the formation of sheets possible?
A) The polysaccharides in peptidoglycan are highly branched and form a network. B) The glycosidic linkages between monosaccharides in peptidoglycan are extraordinarily strong. C) Individual strands are joined by peptide bonds, a type of covalent bond. D) The polysaccharides in peptidoglycan form helical structures, as in cellulose.
EcoRI and HindIII are ________.
A. palindromes B. reverse transcriptases C. restriction endonucleases D. ligases E. DNA polymerases
The type of feeding used by many hydrozoans is: a. scavenging
b. active predation feeding. c. foraging. d. suspension feeding.
What are the two main functions of the choroid layer, located behind the retina in humans?
What will be an ideal response?