Animal hormones are chemical messengers produced by various glands and tissues in animals that regulate physiological processes...
BIOLOGY
Mammals are biparental in reproduction that is sexual reproduction involves two distinct and separate individuals, sexually mature...
1) Evidence from comparative anatomy Homologous structures can be used to explain the evidence of comparative anatomy....
A) Mutation theory of organic evolution Mutation is a change in genetic material resulting in a new...
Charles Darwin, a British biologist, in 1859 propounded a theory of organic evolution by Natural Selection leading...
Jean Baptiste Lamarck, a French biologist was one of the first biologists to put forward the theory...
The world is occupied by millions of different kinds of plants and animals. These plants and animals...
The lower plants All the plants from the single-celled Chlamydomonas, bacterium, Phacus to the simple multicellular Spirogyra,...
The part of plasma which filters into the spaces among the tissues and flows in vessels similar...
There are three plans or types of blood circulation in human beings, other mammals and birds. They...
