Answer:
The heart valves
Explanation:
The heart valves prevent blood from flowing in the wrong direction in the heart. The valves are held in the proper place because of the chordae tendinae.
In chemical reactions the substances present at the start of the reaction are reactant and the substances produced are called product
Answer:
Cell theory
Explanation:
Also known as the cell membrane.
Answer:
i would like to choose sublimation process to explain about water cycle.As mentioned, sublimation is the process in which snow melts and water get vaporized. Ice melts and turns into water which flows to the seas and oceans.When the temperature increases during the day time, water gets vaporized.Water vapour begin to move upward.As we know, temperature decreases with the increase in height.Due to which water vapour rises,cools and then changes into tiny water molecules.Those water molecules forms cloud.Then the clouds get heavier and begin to collide with each other.As a result rain fall occurs.
Evapotranspiration has also the same process but the difference is that it involves vaporization of water from some biological factor like plants and physical factor like from soil .
i think its my first longest answer which i answered here.Thank you for the amaizing question. Its simple but most important topic
After wind erosion, the igneous rock turns to sediment. It may be dropped into a river where the sediments go through cementation and compaction. Then it become a sedimentary rock. This cycle goes on forever. It is called the rock cycle.
