(i) Tropic Hormone: It refers to that hormones which stimulate other endocrine glands to produce their specific hormones.
(ii) Guttation: The process by which intact plant loses water in the form of droplets through pores (hydathodes) is called as guttation.
(iii) Osmosis: Osmosis is the diffusion of water molecules through a semipermeable membrane from a dilute to concentrated solution.
(iv) Stereoscopic vision: When both the eyes are focussed on the same object but from different angles, it is called binocular or stereoscopic vision. All the monkeys, apes and particularly man have binocular vision.
(v) Mutation: Sudden changes in one or more genes or in the number and structure of chromosomes in the progeny, which normally may not have existed in^he parents, grand parents or even great grand parents.
Example: Albinism.