B.
Groups of similar cells that do a particular job.
Answer:
-elastic membranes
Explanation:
The elastic membrane or tissue of the arteries allows the artery to bend and fit. It is important for artery to be elastic, because it transports oxygenated blood pumped from the heart to the tissues (except for pulmonary artery which carries deoxygenated blood) and thus have a blood pressure that is higher than in other parts of the circulatory system.
Organic farming methods enable farmers and gardeners to prepare soil in such a way that nitrogen is added naturally through nitrogen-fixing bacteria rather than nitrogen having to be added through a synthetic fertilizer. This method of growing crops saves farmers money and alleviates the problems associated with fertilizer runoff
Farmers and gardeners should use other methods to provide crops with the nitrogen they need.
Algal blooms are due to the accumulation of algae, generally Cynabobacteria and Dinoflagellates, that grow due to excess nutrients in water.
If good algae grow, they do not accumulate in the waterbodies.
Diatom Algae are good algae.
Therefore if Diatoms are grown instead of Cyanobacteria and Dinoflagellates, there would be no accumulation and no problem of algal blooms.
Answer:
B. reduce greenhouse gas emissions
Explanation:
The hydroelectric energy has its pros and cons as most of the energy production facilities do. One of the biggest advantages of the production of this type of energy is that it almost doesn't emit any greenhouse gases into the atmosphere. Considering the problem that the world is facing because of it, especially the climate changes and rising sea levels because of that, this is seen as a very big plus for any type of energy production. This has resulted in the building of more and more dams that produce hydroelectric energy, some of which have been made very large and very large energy production.
Answer:
30meter per second
Explanation:
Given that
Distance = 3000 meters
Time = 100seconds
Speed = distance /time
Substituting the values
Speed = 3000/100
Speed = 30meter per second
The average speed needed to cover the travelling will be 30meter per second.
