An obligate anaerobe is an organism that:
A. is poisoned by oxygen
B. requires oxygen
C. can use oxygen but can get along without it
D. produces oxygen
E. has none of the options listed
A. is poisoned by oxygen
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In which of the following laws did Mendel assert that one trait in a heterozygote will conceal the presence of another trait for the same characteristic?
a. law of dominance b. law of segregation c. law of dependent assortment d. law of incomplete dominance
What is the function of erythrocytes?
a. carry oxygen b. form clots c. fight off infections d. produce blood cells e. secrete erythropoietin
Membranes that line the tubes and cavities of the digestive, respiratory, and reproductive systems are called
1.mucous. 2.dense, regular. 3.desmosomes. 4.apocrine 5.serous.
If a woman is a carrier for the color-blind recessive allele and her husband has normal vision, what are their chances that a son will be color-blind?
A) none, because the father is normal B) 50%, since the mother is only a carrier C) 100%, because the mother has the gene D) 25%, because the mother is a hybrid E) None, since the son will also be just a carrier.