Hi some one please solve from question 4 to 7
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4.The process of meiosis involves two divisions the first division or meiosis I is known as a reduction division because it reduces the number of chromosomes that is 46ir 2n to half its number that is 23or n
2.
we know that when we place a cell in a concentrated salt solution water is drawn out of the cell or it undergoes exosmosis similarly when person consumes concentrated salt water the cells present inside loses waterWhen person drinks concentrated salt solution then it eventually reaches to intestine. As salt solution contains more solutes than nearby tissues, then the water from those tissues start moving to intestine. This process is endosmosis in which the water molecules move from lower solute concentration to higher solute concentration through intestinal wall. Intestine cannot tolerate strain due to extra incoming water and hence, the extra water is spilled out through vomiting.
3. know that water moves from one area of its of its higher concentration to an area of its lower concentration so when we soak seeds in water water moves inside the seed by the water concentration is less
4. water hyacinth has special structured stems which helps it to float on the surface of water these terms have air inside it that helps water hyacinth to keep floating on the water
5. should not pluck the stem tips of small plants because they are very soft and sensitive and it may break the stem
6. identifying features of a neurone are it's dendrites and its Axon
7. the identification for smooth muscles is that there is no cross strips and it appears smooth a like that of striated muscles
a plant cell has cell wall chloroplasts and plastics on like that of an animal cell
