In plant cells, the middle lamella _____
A) allows adjacent cells to adhere to one another
B) prevents dehydration of adjacent cells
C) maintains the plant's circulatory system
D) allows for gas and nutrient exchange among adjacent cells
Answer: A
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Tracers are elements that ____
a. are used in minute amounts in plants b. can be monitored through biochemical reactions c. must be inert d. have an unbalanced electrical charge e. must have a stable nucleus
The life cycle of the human liver fluke has intermediate hosts
a. one. b. two. c. three. d. four.
Identical twins have identical ____, but they do not always have identical ____
a. mitochondrial DNA; genotypes b. genotypes; mitochondrial DNA c. genotypes; phenotypes d. phenotypes; genotypes e. phenotypes; mitochondrial DNA
Which of the following are examples of isomers?
(a) glucose and galactose (b) alanine and glycine (c) adenine and guanine (d) glycogen and cellulose