Which of the following is an example of artificial selection?
A) Green tree frogs that blend perfectly into their leafy surroundings
B) The many different breeds of domestic cats
C) The many different species of Oak trees found in the forest.
D) Cheetahs that can outrun their prey
E) All of the above
B
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The most common type of mutation that cause cystic fibrosis is a(n) ____
a. deletion b. insertion c. base-pair substitution d. gene duplication e. transformation
In snapdragons, heterozygotes have pink flowers, whereas homozygotes have red or white flowers. When plants with red flowers are crossed with plants with white flowers, what proportion of the offspring will have pink flowers?
A) 0% B) 25% C) 50% D) 75% E) 100%
As electrons flow through complexes in the inner mitochondrial membrane, protons are moved from the matrix to the inter membrane space. This can make the pH
A) the same in the matrix and the inner membrane space. B) lower in the matrix. C) lower in both the matrix and the inner mitochondrial space. D) lower in the inner membrane space.
Exchange of genetic material among different species is called
A. exon shuffling. B. exon shuffling and/or genetic recombination. C. horizontal gene transfer. D. genetic recombination. E. homolgous gene exchange.