PART - 2 - Unit V : CH - 17 Locomotion and Movement — BIOLOGY STD 11 Science — Question

Fill in the gaps: Reabsorption of water from distal parts of the tubules is facilitated by hormone _______.

Name the epidermis which covers both the upper surface and lower surface of the leaf.

Why are persons with blood group 'O' known as‘universal donors'?

Why do doctors recommend vegetable oils with polyunsaturated fatty acids for persons suffering from cardiovascular disease?

What is the term used for the stimulus of adequate strength?

Why are smooth muscles called 'involuntary muscles?

On which organelle of the cell structure does intracellular digestion depend? What is the chemical content of those organelles?

A student cultures a callus from the tobacco pith in a sterilised minimal nutritive medium, but adds more cytokinins than auxins. What would develop first from the callus the shoot buds or the roots?

Give the name of vessel of peritubular capillaries that runs parallel to the loop of Henle.

What is a cnidoblast?