Introduction to Botany

• The systematic study of plants and trees is called Botany.
• The ophrastus is called Father of Botany.

Sex Determination in Humans

The male sex chromosome in humans if XY; the female sex chromosome is XX. In the times of gamete buildup, in male of the sperms holds X chromosome while other half holds Y chromosome. In female all gametes contains only X chromosome. When a male gamete carrying X chromosome, fertilize and ova, the result zygote developed would be a female. And When a male gamete carrying Y chromosome, fertilize and ova, the result zygote developed would be a male.

Biology of Cell

•    Cell is main basic structural unit of all organisms, microscopic in nature, it contains cytoplasmic material and nuclear material in a semi permeable membrane, this membrane is called cell wall in case of plants.

•    Biological organisms may contain a single cell (unicellur) or multiple cell (multicellur).

•    Each cell in organisms works like a programmable chipset to function; it takes nutrients, converts nutrients into energy and performs specialized tasks necessary for life.

•    Robert Hooke discovered the cell in 1665.

•    First Cell Theory was developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann.

Medical Inventions and Discoveries

Invention	Scientist	Year
Adhesive plaster-covered bandages	Paul Beiersdorf	1882
Anaesthetic	William Morton	1846
Anthrax (vaccine)	Louis Pasteur	1881
Antiseptic	Joseph Lister	1865
Artificial heart (implant, human)	Denton Cooley	1969

Diseases Caused by Viruses in Humans

Here is a list of the diseases that viruses cause in the human body. Only proper hygiene and care can help prevent these diseases. While some of them are easily preventable and curable, some can prove to be fatal if not diagnosed and treated on time. Hence, a viral infection must never be taken lightly.

List of Diseases Caused by Bacteria

The human body is vulnerable towards bacteria. Here given diseases caused by different bacteria and affected organ