P-2 Cell Biology and Biotechnology — Science STD 10 — Question

An object is placed at 30 cm from a convex lens of focal length 20 cm. State the nature and the size of the image relative to that of the object.

Define ignition temperature of a fuel.

Find the odd one out: Amphioxus, Herdmania, Doliolum,Oikopleura

Write word equations and then balanced equations for the reactions taking place when:
Dilute sulphuric acid reacts with zinc granules.

Name the physical quantity whose unit is dioptre.

Which one term in the following includes the others?
Air, flora, fauna, environment, water, sunlight, soil.

Name the two types of transport systems in the human beings.

Write the functions of the following: Corolla.

Name the plant hormones which are responsible for the following effects:
Opening of stomata.

What is meant by catenation? Name two elements which exhibit the property of catenation.