Given below is a picture of a tree. Mention the scientific phenomena occurring in the parts labelled (a), (b) and (c).

What is a semi permeable membrane? Name the semi permeable membrane present in a plant cell.

What is Active transport?

Arrange and rewrite the terms in each group in correct order to be in a logical sequence beginning with the term that is underlined: (a) Snake, Rabbit, Cabbage, Hawk. (b) Xylem, Soil water, Cortical cells, Root hair. (c) Receptor, Response, Effector, Spinal Cord. (d) Fovea, Lens, Cornea, Conjunctiva. (e) Testis, Urethra, Sperm duct, Epididymis.

Deplasmolysis occurs when a plasmolysed cell is placed in: (a) Concentrated salt solution (b) Tap water (c) Concentrated sugar solution (d) Hypertonic salt solution

Mention two adaptations in roots for absorption of water from the soil.

Osmosis involves the movement of water molecules through a: (a) Freely permeable membrane (b) Cell wall (c) Selectively permeable membrane (d) Impermeable membrane

Assertion (A): A turgid plant cell is in a balanced state. Reason (R): In a turgid cell, turgor pressure and wall pressure are equal and in the same direction. (a) A is True and R is False (b) A is False and R is True (c) Both A and R are True (d) Both A and R are False

Name the following: (a) Unicellular outgrowths of the epidermis of roots. (b) The defect of the eye in which some parts of an object are focused while other parts appear blurred. (c) The tropic movement in response to chemicals. (d) The main nitrogenous waste in the human body. (e) The attachment of the fertilized ovum to the wall of the uterus.

Varun's mother added plenty of salt to the mango pickle she made. This is to: A. enhance the colour of the pickle. B. inhibit the growth of microorganisms. C. increase the nutritional value. D. create a hypertonic solution. (a) A and C (b) B and C (c) C and D (d) B and D

Vineet’s day begins with a cup of piping hot coffee. Caffeine is a stimulant present in coffee which increases the circulation of Adrenaline in the body. Vineet feels refreshed, alert and focussed. (a) Name the organ that is stimulated by caffeine which makes Vineet alert and focussed. (b) Give the collective term for the protective membranes of the organ mentioned in (a). (c) Which part of the autonomic nervous system increases the secretion of Adrenaline?

Draw a neat, labelled diagram to show that oxygen is released during photosynthesis.