What would happen to the seasons if the Earth were tilted 35 degrees off its orbital plane instead of the usual 23.5 degrees?
A) The seasons would disappear.
B) Winters and summers would be more severe.
C) Winters and summers would be less severe.
D) The seasons would be shorter.
Answer: B
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Which of the following statements about generalized transduction is false?
A. "Head full" packaging always places only phage DNA into the phage head during phage packaging in generalized transduction. B. Generalized transduction always involves lytic phage. C. Generalized transduction can be used to map bacterial genes. D. Genes that are close together on the bacterial chromosome will have a relatively large cotransduction frequency. E. Two recombination events are necessary to integrate the transferred DNA during generalized transduction.
All of the following are diseases caused by viruses except
A. strep throat. B. AIDS. C. polio. D. small pox. E. measles.
The phenotype expressed by a single genotype can be affected by environmental conditions
Indicate whether the statement is true or false
Genetics is defined as the scientific study of ____
a. diseases b. DNA c. heredity
d. chromosome structure e. cell structure