The percentage of twins being born has increased in the past 20 years because of:
a. the increased use of fertility inducing drugs.
b. increases in hospital care.
c. the desire of more couples to have twins.
d. the increased use of thalidomide.
e. the increased incidence of German measles.
A
You might also like to view...
An adult animal that possesses bilateral symmetry would most likely be _____
A) triploblastic B) a deuterostome C) coelomates D) diploblastic
Segmented genomes in negative-strand RNA viruses may include two to eight segments each coding for a unique protein.
Answer the following statement true (T) or false (F)
Besides ATP from the light reactions, the carbon reactions also require
A. NADPH from the light reactions. B. glucose from the mitochondria. C. CO2 from the atmosphere. D. Both a and c are correct.
You attempt deletion mapping of a part of the promoter region of a particular gene. You remove a short sequence of nucleotides. Once the altered DNA is transfected into cells, the cells are able to transcribe the transfected DNA in a normal fashion. What do you conclude?
a) The deleted sequence has a moderate level of importance in promoting transcription. b) The sequence that was removed is not an essential part of the promoter. c) The sequence that was removed is an essential part of the promoter. d) The sequence that was deleted is an important determinant of the ability to transcribe the gene.