Question
Which of the following statements refers to the process
of 'parthenogenesis"? 1. It is a natural form of asexual reproduction in which growth and development of embryos occur without fertilisation. 2. It is a mode of reproduction in which a male organism's sperm fertilises a female organism's egg outside of the female's body. 3. It is a mode of reproduction in which a male organism's sperm fertilises a female organism's egg inside of the female's body. Select the correct answer using the codes given below.Solution
The correct answer is A
Two circles of radii 15 cm and 10 cm touch each other externally at a point A. PQ is the direct common tangent of those two circles of centers O ₁ and...
A sector of a circle has a central angle of 60°. If the radius of the circle is 14 cm, what is the area of the sector?
Two chords AB and CD of a circle intersect at E such that AE = 3.4 cm, BE = 4.2 cm and CE = 2.6 cm. What is the approximate length of DE?
- AB is the diameter of a circle centered at O. A tangent drawn at point C intersects the extension of AB at point D. If ∠CAB = 38°, find the value of ∠...
Find the area of the sector of a circle with radius 14 cm and central angle 90°.
The wheel of a car made 300 rotations. How much distance did the car travel if the diameter of the wheel is 28 inches? (1 inch = 2.54cm)
- A circular sector has a radius of 14 cm and an area of 154 cm². What is the angle formed at the center by the arc? (Take π = 22/7)
If a wheel covers a distance of 660 m in 30 rotations, then the diameter of the wheel is?
A circular racing track has been developed in a field. If the difference between the outer circumference and the inner circumference of the racing track...
Find the length of the direct common tangent of two circles with radii 8 cm and 5 cm respectively, if the distance between their centres is 11 cm.
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