cell

Question 1

who discovered the cell and how

Answer 1

robert hooke discovered the cell. he was observing slices of cork under his self designed microscope called crude microscope. cork is a part of the bark of a tree. he saw tiny things and he named them cell

Question 2

cell consists of how many parts name them

Answer 2

1. cell membrane
2. cytoplasm
3. nucleus

Question 3

cell membrane or plasma membrane

Answer 3

a) it is a thin delicate membrane which is a thin layer of every cell.
b) it allows entry and exit of only selected substances and is called SELECTIVELY PERMEABLE MEMBRANE.
c) it protects the cell from possible injuries and is called CELL WALL

Question 4

cytoplasm

Answer 4

between cell membrane and nucleous a jelly-like fluid substance is called cytoplasm. all the chemical reactions happen here

Question 5

nucleous

Answer 5

it is a central spherical structure which is the most important part of a living cell. it controls the genes that parents give to their offsprings

Question 6

plant and animal cell

Answer 6

plants- larger cell, has cell wall, has plastids

plant- smaller cells, no cell wall and doesnt have plastids

Question 7

prokaryotic cells

Answer 7

which do not have a well organised nucleus due to the absence of nuclear membrane. the organisms with this cell are called prokaryotes.

Question 8

eukaryotic cells

Answer 8

the cell which have a well organised nucleus with nuclear membrane. organisms with these cells are called eukaryotes