What is passive and active uptake of ions? Give an account of the carrier mediated uptake.

Metabolic inhibitors which prevent active uptake of ions in plants are

What is oogenesis? Give a brief account of oogenesis.

What is soil pollution and how is it caused ? Give a brief account of the measures which can reduce it.

Initial phase of ion uptake

Active uptake of minerals by roots mainly depends on the

Active uptake of minerals by roots mainly depends on

In mineral absorption , (i) There is rapid uptake of ions into free space in its first phase. (ii) Initial uptake of mineral is passive (iii) Entry or exit of ions to and from inner space does not require energy.

Which of the following is correct regarding mineral ions absorption in plants? (a) Most of the mineral ions are absorbed passively and actively absorbed (b) Most of the mineral ions are absorbed passively (c) All the mineral ions are actively absorbed (d) All the mineral ions are passively absorbed

Give an account of the activity of the cambium in the secondary growth of the stem.

What are the two classes of emulsions? Give one example of each class. State the activity to test the type of an emulsion.