The sum of all Earth's ecosystems is called the
A) stratosphere.
B) lithosphere.
C) biosphere.
D) hydrosphere.
E) troposphere.
Ans: C) biosphere.
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What nucleotide change is a shared derived character for species A, B, and C, but not for species G?
A,T,G, and C refer to nucleotide bases, and the numbers refer to the position of the base in the nucleotide sequences.
For example, A6 refers to an adenine at the sixth position.
A. Changing the second G to an A is common to species A, B, and C, but not to species G.
B. Changing the fifth T to a G is common to species A, B, and C, but not to species G.
C. Changing the second G to a T is common to species A, B, and C, but not to species G.
D. Changing the second G to an A and the fifth T to a G is common to species A, B, and C, but not to species G.
E. None of these show a change in derived characteristics for A, B, and C that are not found in G.
Which of the following statements about the human genome is INCORRECT?
A) There are approximately 3.1 billion bp in the human genome. B) Human share a majority of genes with other species. C) Less than 2 percent of the genome codes for proteins. D) The human genome contains approximately 100,000 genes. E) The functions of most human genes are still unknown.
Which of the following can release histamines?
a. Invading bacterial cells b. Cells from damaged tissues c. Wood from a splinter d. Cells from damaged tissues and the complement pathway e. The complement system
Figure 29.12 C
Use the accompanying figure of a Capsella seed to answer the following question.
?
A cotyledon is indicated by the letter ____.
A. A B. B C. C D. D E. E