Define Hormones.
These are chemical substances which are secreted from endocrine glands.
Biology
What is Exocrine glands .
The glands which have ducts that carry their secretion to specific places in the body.
What are Endocrine glands .
These are ductless glands which pour their secretion directly into blood .
Name two main components of Ecosystem ?
Two main components are :- BIOTIC ABIOTIC
Define Food web ?
A network of food chains in a community is reffered to as a food web.
Define Food chain ?
The transfer of materials and energy from their ultimate source in plants as producers through series of organisms each of which eats the smaller preceding one and is eaten by larger succeeding one is called Food chain.