Protozoa

Size, shape, structure, nutrition and reproduction of protozoa

Virus

Size, structure, shape , classification, types , nutrition and reproduction of viruses.

Bacteria

Size, shape, structure , nutrition, requirements and reproduction.
And economic importance of bacteria.

Microbes

About microbiology and milestones in the discovery of organisms.

Fungus

A bracket fungus eventually weakens and kills its host . It then feeds as a saprotroph on the dead remains of the tree.

Microbes in Human Body

Microbes found in :-
Ear                  -      Aspergillus
Skin                -      Candida
Small intestine  -      Clostridium
Intestines         -     Escherichia coli
Vagina             -     Gardnerella vaginalis
Stomach          -     Lactobacillus
Urethra            -     Mycobacterium
Nose               -     Staphylococcus aureus
Mouth             -     Streptococcus salivarius
Large intestine  -     Trichomonas hominis

Lignin

Lignin is extremely resistant to both chemical and enzymatic degradation , though some fungi produce enzymes which can act on lignin and lignin linked to cellulose. 

Polygenic traits

Polygenic traits and Environmental factors

Human Blood Group

Human Blood Groups:

 Agglutination:

Blood Group

The rare blood group in the world is 'AB-'

Blood Group

The most common blood group in the world is 'B+' and in India it is 'O+'

Blood Group

There cannot be a parent and offspring relation between AB blood group and O

Probability in Bio

Mendel dealt with probabilities. One of the things that made his predictions accurate was that he worked with a large number of plants. He studied almost 30,000 plants over a period of 8 years and by doing so he increased the chances of seeing a repeatable pattern.

Breeds and Traits

Did you know there are over 493 dog breeds but they all belong to the same species ( Canis familiaris) ?

Bombay phenotype

This blood phenotype was first discovered in Bombay by Dr.Y.M.Bhende, is present in about 0.0004% of the human population. Individuals with the rare Bombay phenotype (hh) do not express antigen H on their red blood cells. its like they do not have both A and B antigens ( similar to O blood group ) but people with such a blood group can receive blood only from other people with the same blood group (hh) although they can donate as though they were type O.