Answer:
Pollen is produced during the pollen formation cycle of a flower.
Explanation:
Answer:
The two types of cells that never go through cell division once fully formed are nerve cells and muscle cells.
Explanation:
The nerve cells and the muscle cells not undergo cell division after formation, because they can never re grow or cannot be repaired once they are mature. We should take good care of it once they are matured. They just under division from being baby to teenagers after that they stop undergoing cell division. This is true for both elephants as well as human beings. This thing is also applicable in case of bones.
Minerals may be defined as the combination of two or more elements of a substance.
<u>Five criteria that exhibits a particle to be minerals; </u>
- They are natural and not man-made.
- Inorganic i.e. not made by any organism.
- Minerals are solids, not liquid or gas.
- They have a definite chemical structure.
- The atoms in minerals are arranged systematically and are arranged in a repeated pattern.
Minerals are natural and we use it in our day to day life. Products like salt and even a pencil have minerals. Also, these minerals help the parts in the human body to grow faster and function properly.
Answer:
cell membrane
Explanation
It's the outer living boundary of animal cells. It's made of lipid and protein. Plasma Membrane is a mosaic of phospholipids, cholesterol, and proteins, the proteins in plasma membrane regulates the coming/going of substances into/out of the cell.
The situation would be that, in a sealed tube, there are 3 to 4 nails inside and a certain amount of calcium chloride was added. After three days, there will be no changes to be observed in the first tube since the oxygen is not enough to initiate a change and there is no presence of water. For the second test, the same situation is made but boiling water was filled in the tube. For this, no changes would still be observed since there is no moisture. For the last test, the same situation as the first but it is filled halfway with water. After 3 days, rust would be observed on the nails. In order for rust to happen, there should be water and oxygen. The oxygen in the early atmosphere of the Earth would react with iron present in the oceans thus producing iron ores.
