Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts.

Assertion : The muscular walls of ventricles are thicker than auricles. Reason : This helps in preventing the back flow of blood.

Assertion : Transpiration is a necessary evil. Reason : It causes water loss but helps in absorption and upward movement of water and minerals.

A student draws the following sketch of the stomatal apparatus: The chloroplast and nucleus is denoted by

In the diagram of the stomatal pore given below the marking corresponding to the chloroplast is:

Which cell organelle is involved in breakdown of glucose to produce energy for metabolic activities?

Excretion is carried out by nephridia in

In the experiment to show that CO, is given out during respiration, the student uses:

The rate at which oxygen moves from the alveoli of our lungs into our blood:

In an airtight experimental set-up which was used by you in the laboratory to study respiration in germinating seeds, the seeds obtained the oxygen for respiration from

When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of

The opening and closing of the stomatal pore depends upon _____?

The carbohydrates synthesized in the leaves are transported through sieve tubes most commonly in the form of

The ultimate cause for the movement of water against the gravity in a tree is

Match the labelling of the following