Answer:
False
Explanation:
Biological evolution is about the origin of species (different kinds of life) after life came into existence. Evolution is mainly concerned with the origin of humans.
the Galapagos
While visiting the Galapagos in 1835, British naturalist Charles Darwin observed local plants and animals.
it has an alternating chemical<span> phosphate and </span>sugar<span> backbone, making the 'sides' of the ladder. (Deoxyribose is the name of the </span>sugar<span> found in the backbone of DNA.) In between the two sides of this </span>sugar<span>-phosphate backbone are four nitrogenous bases: adenine (A), thymine (T), </span>cytosine<span> (C), and guanine (G).</span>
The answer is A, 'a mammal' because it goes with the copulative verb 'to be', i. e., 'is'.
- Oxygen cycle is the cycle which maintains the level of oxygen in the atmosphere.
- Oxygen from the atmosphere is used up during combustion, respiration and in the formation of oxides of nitrogen.
- This oxygen is returned to the atmosphere by lithosphere.
- This forms the oxygen cycle in nature.
Hope you could get an idea from here.
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