Home
Class 10
BIOLOGY
(a) What is the picture about? (b) Wha...


(a) What is the picture about?
(b) What does the picture of the last man indicate to us and what was he called?
(c ) How did the change happen from first man to the last man as shown in the figure?

Text Solution

Verified by Experts

(a) It is about the changes in the development of Human brain.
(b) The picture of the last man indicates that the man is wisest of all as his brain is most developed. He ws called as Homo sapiens.
( c) Evolution of the upright man continued in the direction of developing its brain 20 lakh yers age upto this age. Many discoveries were made like fire, practice of agriculture, rearing cattleherds, establishing cities, etc. About 10000 years ago. Cultural development and art of writing developed about 5000 years ago.
Modern sciences and industrial society developed in recent 200-400 years.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • HEREDITY AND EVOLUTION

    CHETAN PUBLICATION|Exercise Answer in detail:|10 Videos

  • HEREDITY AND EVOLUTION

    CHETAN PUBLICATION|Exercise Observe the picture and answer the questions:|2 Videos

  • HEREDITY AND EVOLUTION

    CHETAN PUBLICATION|Exercise Draw neat and labelled diagrams of:|3 Videos

  • ENVIRONMENTAL MANAGEMENT

    CHETAN PUBLICATION|Exercise ASSIGNMENT-4|5 Videos

  • INTRODUCTION TO MICROBIOLOGY

    CHETAN PUBLICATION|Exercise Assignment - 7|12 Videos

Similar Questions

Explore conceptually related problems

What is normal heart beat in man? How does it occur?

What happens to the respiratory process in a man going up a hill?

(a) Label parts 1 to 4. (b) What is the evidence of evolution shown in the picture? (c ) What is Carbon dating?

Figure shows a man standing stationary with respect to a horizontal conveyor belt that is accelerating with 1 m s^(-2) . What is the net force on the man? If the coefficient of static friction between the man’s shoes and the belt is 0.2, up to what acceleration of the belt can the man continue to be stationary relative to the belt ? (Mass of the man = 65 kg.)

The greatest height to which a man can throw a stone is h. What will be the greatest distance upto which he can throw the stone?

A man with a near point of 25 cm reads a book small print using a maagnifying glass, a convex lens of focal length 5 cm. (a) What is the closest and the farthest distance at which he should keep the lens from the page so that he can read the book when viewing through the magnifying glass? (b) what is the maximum and the minimum magnification (magnifying power) possible using the above simple microscope?

A man with normal near point (25 cm ) reads a book with small print using a magnifying glass : a thin convex lens of focal length 5 cm . a What is the closest and the farthest distance at which he should keep the lens from the page so that can read the book when viewing through the magnifying glass ? b. What is the maximum and the minimum angular magnification (magnifying power ) possible using the above simple microscope ?

A voltmeter of resistances 400(Omega) is used to measure the potential difference across the 100(Omega) resistor in the circuit shown in figure.(a) What will be the reading of the voltmeter ?(b) What was the potential difference across 100(Omega) before the voltmeter was connected ?

The radioacitve decay of an element is shown in the graph. a. What is the sort of functional decay shown here? b. What is the change in activity in equal intervals of time? c. Find the half-life. d. Can you find the decay constant? If so, what is its value ?

6.A straight wire carrying a current of 12 A is bent into a semi-circular arc of radius 2.0 cm as shown in Fig. (a). Consider the magnetic field B at the centre of the arc. a . What is the magnetic field due to the straight segments? b. In what way the contribution to B from the semicircle differs from that of a circular loop and in what way does it resemble? c. Would your answer be different if the wire were bent into a semi-circular arc of the same radius but in the opposite way as shown in Fig. (b)?

Home
Profile