Answer: The percentage of unknown material has grown in scientists estimates since the 1970’s; the percentage of dark matter has shrunk in scientists estimates since the 1980s
Explanation:
Answer: 2, 4 and 5.
Explanation:
Human system are made of various organs which in turn are made up of various tissues which in turn are made up of various cells. Cells are therefore much more numerous than systems.
As already mentioned, organs are made up of tissues which are made up of cells so statement 4 is right.
As systems are made up of various organs working together, they are more complex than the individual organs. For instance, the Muscular system is more complex than the triceps or bicep muscles.
<h2>Answer:</h2>
1.we should not cut trees as this can effect the food chain of animals.
2.we should water the plants everyday
3.we should atleast plant a baby plant every day.
4.we should not kill any animal.
5.we should decrease the use of plastics.
6.we should keep our area pollution free.
7.we should use natural pesticide to a plant
The answer for the above question is carbon dioxide.
Climate change is caused by various factors which includes greenhouse effect and global warming. Green house gases are responsible for warming, and humans emit them in a variety of ways. The most common being from the combustion of fuels in cars, factories and electricity production. The gas responsible for the most global warming is carbon dioxide, other contributors include methane, nitrous oxide from fertilizers among others
Frank could simply be a short-term memory loss, while Jerome could have a muscular dystrophy
