When ____ cells mature, they develop thick secondary walls strengthened by lignin and cellulose and die, leaving
empty cells that serve as pipelines for water and mineral transport.
a. sclerenchyma
b. tracheids
c. collenchyma
d. parenchyma
e. vessel members
ANSWER: a
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If water "behaved" like other substances, then
Sucrose is composed of ____
a. two molecules of fructose b. two molecules of glucose c. a molecule of fructose and a molecule of glucose d. a molecule of fructose and a molecule of galactose e. two molecules of galactose
You are a genetic counselor working with a phenotypically normal young couple who have been referred because the wife has a family history of a mitochondrial disorder that results in considerable dysfunction
What is the most important consideration you can suggest? A) to refrain from having children that are hers biologically B) that she be tested to find out what percentage of her mitochondria bear the mutation C) that both husband and wife have mtDNA testing for the sequence in question D) that her affected mother's DNA be tested E) that they consider having only sons
Which structure in males is shared by both the urinary and reproductive systems?
a. the prostate gland b. the ureter c. the urethra d. the urinary bladder