Select the best response to the question.
?You are reviewing a patient's sputum culture results that have tested positive for Staphylococcus epidermidis. How do you interpret these findings?
A) The patient has a respiratory infection.
B) The patient's sputum is no longer sterile.
C) This is part of the patient's normal flora.
D) The results are inconclusive.
C
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Which of the following is the best answer for why plants require nitrogen?
A. to make carbon nitrogen bonds B. to make chlorophyll C. to make amino acids and nucleotides D. to make cell walls E. to make membranes
An example of a retrovirus in the human genome is the ________ family of sequences.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. Researchers in England found that, for three out of four habitat types they were studying, the most efficient strategy was to create a system of stepping stones linking existing habitat clusters. "Stepping stones" are a type of corridor. 2. The degree of allelic diversity of a population is independent of its size. 3. If the tilt of Earth's axis relative to its plane of orbit was increased to 30 degrees, the seasons in Boston would become less distinct. 4. Homo sapiens have existed on earth for 2% of the earth's history. 5. Prokaryotic organisms were the only life-forms present on earth for almost 2 billion years. Multicellular eukaryotes have only been around for about 25% of earth's history
Rattlesnakes strike and inject venom into prey and then release the prey item and follow it
until the venom takes its effect. Typically, rattlesnakes strike at the base of the skull, and their strike accuracy is very high. Because the brain is very active, it produces a lot of heat, and this is detected by the snakes with __________ located in pit organs on the anterior region of the head.
a. thermoreceptors b. photoreceptors c. chemoreceptors d. pain receptors