Tay-Sachs disease is a(n) __________ disease that results in blindness, mental retardation, and death
due to __________.
a. sex-linked; the absence of one of the sex chromosomes
b. autosomal recessive; accumulation of lipids in brain cells
c. X-linked; accumulation of lipase in cells of sweat glands
d. autosomal; the inability to break down amylase in the intestines
e. autosomal dominant; accumulation of mucus in the lung
B
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The introduction of the brown tree snake to the island of Guam in the 1940s has resulted in _____
A) eradication of non-native rats and other undesirable/pest species B) the extirpation of many of the island's bird and reptile species C) a good lesson in biological control D) a new species of hybrids from crossbreeding with a native snake species E) its failure to compete with native species and its quick elimination from the island
Provide evidence supporting the statement that an ecosystem is controlled by microbial activities
What will be an ideal response?
A type of horizontal gene transfer in prokaryotes, in which a cell receives bacterial DNA from a bacteriophage, is
A. fixation. B. transformation. C. replication. D. transduction. E. conjugation.
TRUE Lysosomes contain enzymes that are so destructive that, if the enzymes were released from these organelles, they would damage or kill the cell that contains them.
a. true b. false