Chewing
a. chemically breaks up the food.
b. aids in forming the food into a consistency suitable for swallowing.
c. decreases the surface area of food exposed to digestive enzymes.
d. is the first phase of peristalsis.
e. requires teeth.
B
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An infection of the membranes covering the brain is called
A. encephalitis. B. meningitis. C. arachnitis. D. ventriculitis.
Turner Syndrome (XO) is the only viable monosomy found in humans. Some sex chromosome
trisomies are also viable, including XXX, XXY, and XYY. There are no viable autosomal monosomies, and a small handful of viable autosomal trisomies exist, such as Trisomy 21 (Down Syndrome), and Trisomy 13 and 18, both of which are lethal within the first year of life. Clearly aneuploidy is not tolerated well in humans. Speculate as to why there are so few viable monosomies (only one) in humans, and then why there are so few viable trisomies. Also, speculate as to why aneuploidy involving the sex chromosomes is better tolerated than those involving autosomes.
What will be an ideal response?tRNA molecules are composed of
a. DNA. b. nucleotides. c. amino acids d. polypeptides. e. lipids.
Agrobacterium tumefaciens is often used in the production of transgenic plants because of its Ti plasmid
This plasmid is usually "disarmed" by deleting its tumor genes along with the genes for producing what products that would have been advantageous to the bacterium?