A gene encoding a subunit of hemoglobin in humans is found to be homologous to a gene in chimpanzees. The
homologous gene in chimpanzees likely _____.
a. is a pseudogene
b. encodes the same hemoglobin subunit
c. is inactive because it is in a different species
d. is a regulatory sequence
e. encodes a respiratory enzyme
ANSWER: b
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Based on the population pyramid shown above, you would expect the Indian population to
The diagrams above show the age structures of India, the United States, and China.
A. decrease over time because births are low.
B. stay constant.
C. decrease because the death rate is higher than the birthrate.
D. grow but not stabilize.
E. grow and then begin to stabilize.
It is now possible to analyze the genetics of an in vitro fertilized embryo by
A. fetoscopy. B. amniocentesis. C. chorionic villi sampling. D. preimplantation diagnosis. E. postimplantation diagnosis.
Individuals with the same genetic background and a high degree of homozygosity are said to be isogenic. Of what value are isogenic strains in genetic studies?
What will be an ideal response?
Under what conditions do photosynthesis and cellular respiration occur in plants?
A) Photosynthesis and cellular respiration occur only in the light. B) Photosynthesis occurs only in the light, and cellular respiration occurs only in the dark. C) Photosynthesis occurs only in the light, and cellular respiration occurs in both the dark and the light. D) Photosynthesis and cellular respiration occur in both the dark and the light.