Answer:
D. Single-stranded
Explanation:
DNA normally has a <em>double-stranded </em>structure. Each strand is composed by nitrogenous bases, sugars and phospates; strongly binded together by chemical bonds. The strands are bonded to each other, however, by relatively <em>weak interactions </em>between the hydrogen atoms in the nitrogenous bases in each strand. The energy supplied by heat is enough to break the weak interactions between hydrogens, but not enough to break the strong chemical bonds that make up the strands.
Answer:
is ther more to the question
Answer:
D) The oily secretions from eye ducts prevent the lids from sticking together.
Explanation:
All other options are related to anatomy.
If we define physiology then simple say that it is a branch of bio in which the normal functions of living organisms and their parts are studied.
Because earth has natural cycles it goes through with ecosystems, and when we get involved with trying to help one spectrum of the natural world (rabbits for example) we hurt another (wolves, by over feeding, increasing the population, then exhausting the population of rabbits over a time.)
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