Please select a subject first
Prove that the lengths of the tangents drawn from an external point to a circle are equal.
Concept: Number of Tangents from a Point on a Circle
State the laws of refraction of light.
Concept: Law of Refraction of Light
Write the functions of the following parts in human female reproductive system:-
(i) Ovary
(ii) Oviduct
(iii) Uterus
Concept: Human Reproductive System
Describe the function of placenta.
Concept: Human Reproductive System
Prove that the tangent at any point of a circle is perpendicular to the radius through the point of contact.
Concept: Tangent to a Circle
Prove that a parallelogram circumscribing a circle is a rhombus.
Concept: Number of Tangents from a Point on a Circle
List three distinguishing features, in tabular form, between acquired traits and the inherited traits.
Concept: Evolution
What is meant by a power of a lens? Define its SI unit.
Concept: Power of a Lens
Write the function of the following part of the human eye: Cornea
Concept: Human Eye: Structure of the Eye
Write the function of the following part of the human eye: crystalline lens
Concept: Human Eye: Structure of the Eye
Answer the following question.
What is pollination? Explain the different types of pollination.
Concept: Sexual Reproduction in Flowering Plants
Write the function of the following part of the human eye: ciliary muscles
Concept: Human Eye: Structure of the Eye
Draw the well-labelled diagram of the human excretory system
Concept: Excretion: Substances to Be Eliminated
What is atmospheric refraction? Use this phenomenon to explain the following natural events:
Twinkling of stars
Draw diagrams to illustrate your answers.
Concept: Atmospheric Refraction
List any four methods of contraception used by humans. State in brief two advantages of adopting such preventive methods.
Concept: Human Reproductive System
Explain how the embryo gets nourishment inside the mother’s body.
Concept: Human Reproductive System
A student in viewing under a microscope a permanent slide showing various stages of asexual reproduction by budding in yeast. Draw diagrams of what he observes (in proper sequence)
Concept: Asexual Reproduction > Asexual Reproduction in Plant
Principle of Electric motor
Concept: Electric Motor
Prove that opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centre of the circle.
Concept: Number of Tangents from a Point on a Circle
Decomposition reactions require energy either in the form of heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity
Concept: Types of Chemical Change or Chemical Reaction > Decomposition Reactions
