In order to obtain virtual image of half size using a convex mirror of focal length $10 \ cm$, object should be placed at $..........$ distance from the mirror.
- A$10 \ cm$
- B$20 \ cm$
- C$40 \ cm$
- ✓$5 \ cm$
Answer: D.
View full solution →Question types
heredity and evolution question types
197 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
197
Questions
7
Question groups
5
Question types
01
M.C.Q
42 Q→02Fill in the blank
22 Q→03True-False
15 Q→04[1 Mark Questions]
61 Q→05[2 Mark Questions]
27 Q→06[3 Mark Questions]
26 Q→07[4 marks Questions]
4 Q→Sample Questions
heredity and evolution questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
When light rays emanating are made incident on $..........$ parallel light beam can be obtained.
- ✓concave mirror and convex lens.
- Bconvex mirror and concave lens.
- Ctwo plane mirrors placed at $90^\circ $ angle.
- Dconcave mirror and concave lens.
Answer: A.
View full solution →Value of magnification of image obtained in the rear view mirror fitted in the vehicles is $..........$
- ✓less than $1$
- Bmore than $1$
- Cequal to $1$
- Dless than $1$ or more than $1$ , depending upon the position of object
Answer: A.
View full solution →Value of magnification of image obtained in the rear view mirror fitted in the vehicles is $..........$
- ✓less than $1$
- Bmore than $1$
- Cequal to $1$
- Dless than $1$ or more than $1$ , depending upon the position of object
Answer: A.
View full solution →As shown in the figure, light beams enter the box through holes $A$ and $B$ which come out of box from $C$ and $D$. Then what must have been present in the box?
- ✓rectangular glass box
- Bconvex lens
- Cconcave lens
- Dprism
Answer: A.
View full solution →Radius of curvature of a spherical mirror is always _______ its focal length.(half of, three times, twice)
Incident ray, normal drawn at the point of incidence and reflected ray lie in _______ plane / planes.(one, two, three)
Complete image of a distant object can be seen using _______ mirror.(concave, convex, plane)
Complete image of a distant object can be seen using _______ mirror (concave, convex, plane)
Speed of light in vacuum is _______ . $\left(0.3 \times 10^8, 3 \times 10^8, 3 \times 10^{-8}\right)$
View full solution →In Dinosaurs, the feathers provided insulation in cold weather.
Both the types of pea plants, used as parent generation by Mendel in his experiments, were pure breeds in the expression of their characters.
Asexual reproduction generates generates a large proportion of variations.
Two different species originated from a common ancestor can mutually reproduce amongst themselves.
Since the life originated on the earth, the evolution is a continuous, non-stop process.
Which theory / hypothesis was proposed by Charles Darwin?
State the name of ideas essential for understanding evolution.
State the name of scientists who had successfully synthesised amino acids in laboratory.
Which of the following are examples of artificial evolution ? Wild cabbage, green beetle, kale, kohlrabi, brown skin human, low weight beetle, red cabbage, knightia
Who suggested that life must have developed from the simple inorganic molecules?
Give the scientific reason : It is not true that human beings have evolved from chimpanzees.
Give the scientific reason : The chances of birth of a male child (son) or a female child (daughter) are equal.
Give the scientific reason : The characters are under the control of genes.
Give the scientific reason : The pea plants (Pisum sativum) were selected for Mendel’s experiments.
Give the scientific reason : Sexual reproduction gives rise to variations.
A convex mirror used for rear-view on an automobile has a radius of curvature of $3.00 m$. If a bus is located at $5.00 m$ from this mirror, find the position, nature and size of the image.
View full solution →Explain about $(i)$ Centres of curvature $(ii)$ Principal axis $(iii)$ Optical Centre $(iv)$ Radius of curvature $(v)$ Aperture in case of convex or concave lens.
View full solution →Explain about refractive index in detail.
Define magnification produced by a spherical mirror. What does its value indicate? Also mention its formula. Discuss about its sign for real and virtual image.
Give Four points of difference between concave mirror and convex mirror.
Explain evolution from wild cabbage using the artificial selection.
Describe the sex determination in human beings.
What is sex determination? State the different methods of sex determination in animals.
Explain creation of diversity over succeeding generation.
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