Which of the following diseases is caused by the lack of a functional gene responsible for a specific enzyme?
(A) Down Syndrome
(B) Tay-Sachs disease
(C) Ricketts
(D) Malaria
Ans: (B) Tay-Sachs disease
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A digestive cavity in which food enters an opening at one end and passes through the animal in one direction as it is digested is called the
A. gastrovascular cavity. B. stomach. C. alimentary canal. D. epithelial cavity. E. intestine.
Bicarbonate ions are formed from a reaction
involving ___ and ___.
a. oxygen...carbon dioxide b. water...oxygen c. water...carbon dioxide d. glucose...water e. glucose...oxygen
The structure that people typically refer to as a
“mushroom” is in reality the a. basidiocarp. b. mycelium. c. ascocarp. d. hyphal mass. e. zygospore.
Also called an ovum; haploid cell that is usually fertilized by a sperm to form a diploid zygote.
What will be an ideal response?