When comparing DNA sequences of similar genes for proteins in related species, you see that some of the sequences are longer in one species compared to the other
Which of the following would most likely represent the extra number of bases that you would see?
A. 5
B. 7
C. 17
D. 21
E. 25
D
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The streamlined bodies seen in sharks, tuna, and dolphins best relate to
A. a recent shared common ancestor. B. dissimilar selection pressures. C. the physical properties of water. D. the need to escape fast-moving predators. E. intelligent design.
In specific resistance, if the plant does not have an R protein, which of the following will happen when it comes into contact with a pathogen?
A. The AVR proteins of the virus will not be able to bind and the plant will not become infected. B. The AVR protein will block the plant's basal resistance, allowing the pathogen to infect the cell. C. The AVR protein will activate the plant's defensive genes. D. The AVR protein will bind to a receptor in the plant cell's membrane and a general defense response will be triggered. E. The pathogen will not make AVR proteins if the plant cell lacks the R protein.
An X-linked recessive gene (c) produces red-green
color blindness. A normal woman whose father was color blind marries a color-blind man. (a) What are the possible genotypes for the mother of the color-blind man? (b) What are the possible genotypes for the father of the color-blind man? (c) What are the chances that the first son will be color blind? (d) What are the chances that the first daughter will be color blind? What will be an ideal response?
When did life first appear on the planet?
A) 3.5 billion years ago B) 2.1 billion years ago C) 3.5 million years ago D) 2.1 million years ago