Answer:
The correct answer is b. I and II
Explanation:
Sexual reproduction is present in higher forms of life and absent in prokaryotes like bacteria. Sexual reproduction results in greater evolutionary changes due to the fusion of two different gametes from two different individuals of a species.
Therefore sexual reproduction helps in increased genetic diversity in higher forms of life. In prokaryotes like bacteria, genetic diversity is maintained and increased through DNA transfer from one bacterial cell to another with the help of a process known as horizontal gene transfer.
Bacteria have sex pilli which is used to introduce the genes to the other bacteria. By this process, they increase their genetic diversity and evolve continuously. So the correct is b. I and II.
<u>Answer:</u>
<em>Hydrogen and ozone are both examples of trace gases.
</em>
<u>Explanation:</u>
Trace gases are present in minor quantities in the <em>earth’s atmosphere and all the gases except nitrogen, oxygen and argon </em>which make up the major portion of earth’s atmosphere are considered trace gases.
The respective percentages of nitrogen, oxygen and argon in the atmosphere are<em> 78.1%, 20.9% and 0.934%.</em> The process that produce trace gases is called source and the process that removes trace gas from the <em>atmosphere is called sink.
</em>
<em>Some other examples of trace gases are carbon dioxide, neon, helium etc.
</em>
Answer:
p
Explanation:
<h2><u><em>
p=nucleic acid</em></u></h2><h2><u><em>
o=carbohydrate</em></u></h2><h2><u><em>
n=proteins</em></u></h2><h2><u><em>
s=lipids</em></u></h2><h2><u><em>
t=all have in common</em></u></h2><h2><u><em>
r= protein</em></u></h2>
Diamonds<span> have a three dimensional network of strong covalent bonds,, but </span>Graphite<span> on the other hand has flat layers of carbon atoms held by weak van der Waal's forces. Diamonds are stronger than Graphite as well</span><span>
</span><span>
</span>
Answer: Option A and E.
Explanation:
Norther hemisphere Is the half of the Earth that lies on the north of the equator. The equator is the line that divide the Earth into two halves.
During the winter, the northern hemisphere is colder because the northern hemisphere move away from the sun and receive less sunlight form the sun. The sun is very high in temperature and it has high heat, when the northern hemisphere move away from it, there is lower heat or temperature that get to it , making it to become cooler or have lower temperature. The countries in the northern hemisphere comprises of all countries in Europe, North America, Asia,part of South America and little part of Africa.
Explanation:
