BIOLOGY CH19 Plant Physiology — Science STD 9 — Question

The drug that ¡s known as “Miracle drug” is ………………….

______ is essential to perform separation by solvent extraction method.

Elements with stable electronic configurations have eight electrons in their valence shell. They are ______.

In an electrolyte the current is due to the flow of ______.

ENIAC computer had approximately ………………. vacuum tubes.

The root of the plant is ……………………(i) positively phototropic but negatively geotropic. (ii) positively geotropic but negatively phototropic.(iii) negatively phototropic but positively hydrotropic.(iv) negatively hydrotropic but positively phototropic.

Which of the following compound(s) possesses a high melting point?

The maximum number of electrons that can be accommodated in s, p ,d, and f subshells are _________ .

Which one of the following is a flavour enhancer?

Only green plants have the unique capacity to release ………………….. into the atmosphere.