Well, you could use a stopwatch to measure the times of each swimmer.
Answer:
the answer is a I'm sure of it
Explanation:
Answer: Option (4)
Explanation: Methane (CH4) is one of the green house gas which is about 0.00017% by volume at present.
With the increasing number of factories and the industries, a noticeable amount of methane has been released to the atmosphere so far, and they have the ability to exist in the atmosphere for about 10-12 years. It can also be reduced when undergoes chemical reaction in the atmosphere.
Hence, the correct option here is (4)
Answer:
A natural ecosystem has a diverse amount of species and plants, whereas artificial ecosystems are limited.
Explanation:
Natural ecosystems are self-sustaining and result from spontaneous natural reaction, while artificial ecosystems require the assistance of humans.
So, the endoplasmic reticulum does many things, such as folding the protein molecules in sacs called cisternae. It also transports synthesized proteins in vesicles to the Golgi apparatus.
