What description applies to the term consilience, which is demonstrated by the evidence for the theory of common descent?
A) The supporting evidence for the theory is derived from different sources.
B) The evidence is able to convince even nonscientists who have doubts about the theory.
C) Not enough evidence has been gathered to support the theory.
D) The theory can never be challenged by new evidence.
A
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All living things need carbon. How does most carbon enter the living portion of an ecosystem?
A. Atmospheric CO2 taken in by photosynthesis B. Elemental carbon taken in by plant roots C. Elemental carbon taken in by plant leaves D. Atmospheric CO2 taken in by soil bacteria
Which one of the following statements about cerebrospinal fluid (CSF) specimens is false?
A) They are collected only by physicians. B) They are treated as STAT (emergency) specimens in the laboratory. C) They should always be refrigerated. D) They should be rushed to the laboratory after collection.
A male has been tested, and his sperm seem to be normal. They are motile and seem to be surviving for the appropriate amount of time. However, the sperm don't seem to be able to fertilize an egg
What part of the sperm is most likely to be malfunctioning? A) the tail B) the head C) the midpiece D) the acrosome
Which of the two systems listed work together to bring oxygen into your body and deliver it to your cells?
A) respiratory and digestive B) urinary and cardiovascular C) respiratory and cardiovascular D) lymphatic and endocrine