The phenomenon observed in some plants wherein parts of the sexual apparatus is used for forming embryos without fertilisation is called:

Answer: (ii) proper diet is needed for the rapid growth taking place in their body.  Answer: (i) menstruation starts.  Answer: (ii) chapatti, dal, vegetables.   Appearance of moustache and beard.   Appearance of chest...

In a flower, fertilisation requires both male and female gametes. If pollination does not occur, male gametes will not be available hence fertilisation cannot take place.

(a) Each piece regenerates into a new Planaria. (b) Its filaments break into smaller pieces or fragments and each fragment gives rise to a new filament. (c) It releases spores which germinate into...

(a) Testes produce sperms and secrete a hormone called testosterone. The function of testosterone is to control the development of male sex organs and secondary sexual features. (b) (i) Oviduct or fallopian tubes (ii) Uterus Alter implantation,...

These are adaptations to dry conditions. As a result of these modifications the surface of lamina is reduced thereby reducing water loss by transpiration.

(c) both particle and wave phenomenon. EXPLANATION:    The photoelectric effect shows it as a particle phenomenon while the interference and diffraction of light shows it as a wave phenomenon. Hence duel...

(b) i and ii is correct.

a. Parthenocarpy

(a) Endoscopy refers to looking inside the body through endoscope. Endoscope is an instrument used to examine interior of hollow organ of the body through bore scope technique.

(c) Sexual cannibalism is identified only in spiders. In which female organism kills the male before during or after copulation. In most species in which it occurs, sexual connibalism is...