Cells are composed of atoms, elements, compounds (organic and inorganic) and macromolecules. Proteins, carbohydrates, lipids and nucleic acids are found inside the cell.
A cell is - the smallest unit of matter that can carry on all life processes
- the smallest unit of life that exhibits the characteristics of life
Discovery of the cell was made possible by the development of the
The study of the cell is known as
Hooke (1660's)
Leeuwenhoek (1670's)
THE CELL THEORY (1800'S) - SCHLEIDEN, SCHWANN AND VIRCHOW

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.