Which of the following is a secondary compound of embryophytes?
A) adenosine triphosphate
B) alkaloids
C) GDP
D) chlorophyll a
E) chlorophyll b
Ans: B) alkaloids
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How do you explain this result?
You are trying to improve growth in an economically important fish species. These fish have a gene for large size with two alleles (L,l). You cross a large female (LL) with a small male (ll) and get all large fish! The genotypes of the F1 are 100% Ll, so you assume that large size is dominant to small. You then cross a small female with a large male and get all small fish! The genotypes of this F1 are normal. A. The gene for large size is a maternal effect gene. B. L is not dominant to l. C. The gene for large size is a sex-linked gene. D. L is dominant to l. E. The gene for large size is a maternal effect gene and L is dominant to l.
The Ames test is useful as a rapid screening test to identify those compounds that
A. will respond to chemical agents. B. are mutagens. C. respond to the deletion of DNases. D. will protect an organism from cancer. E. will respond to chemical agents AND will protect an organism from cancer.
What is one difference between the energy produced from the light bulb and the energy produced during the process of bioluminescent light production?
a. Less than 5% of the energy converted is lost as chemical energy during the process of bioluminescent light production. b. Less than 5% of the energy converted is lost as heat energy during the process of bioluminescent light production. c. The conversion of heat energy produced during the process of bioluminescent light production is very inefficient. d. The conversion of chemical energy produced during the process
Which of the following species is credited with being the first to use stone tools?
a) Homo sapiens b) Homo erectus c) Homo habilis d) Cro-Magnon e) Australopithecus afarensis