Let “s” be the distance covered, then – t₁ = s/2/3 = s/6 s/2 = 4.5t₂ + 7.5t₃ = 12t₂ Average Speed = Total Distance/Total Time = S / s/6 + s/24 + s/24 = 4 m/s

False, xylem fibres are mainly supportive in function. Xylem parenchyma stores food and helps in sideways conduction of water.

Small holes on the epidermis of the leaf are called stomata. They are surrounded by two kidney-shaped cells called guard cells.

(i) Ice (ii) Wood (iii) Soil (iv) Air

Product Z is formed by the combination of X and Y, thus having a greater mass than X and Y separately. Furthermore, Z is a completely new product, thus cannot show the same properties as X and Y.

Class IX Science MCQ Extra Questions Answers Class 9 Science Terminal Exams MCQ Solutions Class 9th Science Session 2022-23 9th Science Terminal Exam Based MCQ Extra Questions

In distillation, the separation of liquids is based on different boiling points.

On heating, the acetone starts boiling first and converted into vapours.

(i) The product A₂B shows the properties of substance A and B. (ii) The product will always have a fixed composition. (iii) The product so formed cannot be classified as a compound. (iv) The product so formed is an element.

I. Dead cells of varying shapes II. Large nucleus with vacuole III. Large nucleus without vacuole IV. No intercellular spaces Codes