The function of villi, small finger-like projections in the intestines, is to
allow for more surface area in the small intestines. This way, absorbing nutrients from digested food into the blood would improve greatly. Although they do not
help in digestion, they are still important parts of the digestive system.
<span>(C. A finger is suddenly removed from a hot object.)</span>
Answer:
Option C
Explanation:
Complete Question
Which of the following situations would pose a major difficulty for applying the biological species concept?
a) Two populations of sexually reproducing plants that can be bred easily in the same location under field conditions
b) Two populations of sexually reproducing insects that can be bred easily in the same location under field conditions
c) Five snail fossils taken from the same locality during a 400,000-year time span
d) Dimorphic mating pairs of birds
e) Monomorphic mating pairs of birds
Solution -
According to the biological species concept, two or more organisms that look alike does not mean that they belong to the same species. In order to consider that two organisms belong to the same species, it is essential for them to be able to interbreed or mate.
For example –
Western meadowlarks and Eastern meadowlarks look identical to one another but they do not interbreed with each other and hence they belong to different species.
Hence, option C is correct
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Answer:
buffer zone
Explanation: a small(ish) strip of land that isn't sprayed between the cultivated plot and the water to filter out the chemicals and stop it from reaching the water
