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Maharashtra SSC (Class 10) Unit 7B: Population Genetics & Hardy-Weinberg Evolution — practice questions

Explore 18 free Unit 7B: Population Genetics & Hardy-Weinberg Evolution questions in Maharashtra SSC (Class 10) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 7B: Population Genetics & Hardy-Weinberg Evolution questions and exercises with answers

Showing questions 1–18 of 18.

According to the text, life is said to have been non-existent on the Earth until approximately how long ago?Read the answer and worked solution →Degenerated or underdeveloped useless organs present in an organism's body are called:Read the answer and worked solution →Which of the following is listed as a vestigial organ present in the human body?Read the answer and worked solution →The preserved remnants and impressions of organisms buried underground after disasters are known as:Read the answer and worked solution →The age of a fossil is estimated by measuring radioactivity and the ratio of which isotope to C-12?Read the answer and worked solution →Who developed the carbon dating method and received the 1960 Nobel Prize for it?Read the answer and worked solution →Animals such as Peripatus, which show characters of two different groups, are described as:Read the answer and worked solution →The strong similarity among the early embryos of different vertebrates is taken as evidence that these animals share a:Read the answer and worked solution →In which book did Charles Darwin publish his theory of natural selection?Read the answer and worked solution →The central idea preached by Darwin's theory of natural selection is the:Read the answer and worked solution →Lamarck's explanation that an organ becomes strong or weak according to how much it is used is called the principle of:Read the answer and worked solution →Lamarck used the long neck of the giraffe to illustrate the inheritance of which kind of characters?Read the answer and worked solution →Which part of Lamarck's theory was rejected after repeated verification?Read the answer and worked solution →A species is defined as a group of organisms that can produce fertile individuals through:Read the answer and worked solution →Apart from genetic variation, which type of isolation is stated to lead to speciation?Read the answer and worked solution →The first record of a human-like animal is preserved in the form of which ape from North India and East Africa?Read the answer and worked solution →The wise-man, whose brain was sufficiently evolved about fifty thousand years ago, is known by the scientific name:Read the answer and worked solution →Which is regarded as the first example of wise-man (Homo sapiens) in human evolution?Read the answer and worked solution →

Worked practice questions

According to the text, life is said to have been non-existent on the Earth until approximately how long ago?

  1. 3.5 billion years ago
  2. 3.5 million years ago
  3. 3.5 thousand years ago
  4. 3.5 hundred years ago
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Correct answer: A. 3.5 billion years ago

1. The text describes the early lifeless ocean stage of the Earth. 2. It states life had been non-existent until about 3.5 billion years ago. 3. Simple compounds then gradually formed the first cells. 4. Hence the time scale is 3.5 billion years. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.12_

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Degenerated or underdeveloped useless organs present in an organism's body are called:

  1. Vital organs
  2. Sensory organs
  3. Effector organs
  4. Vestigial organs
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Correct answer: D. Vestigial organs

1. Some organs become useless as the environment of an organism changes. 2. Such degenerated or underdeveloped useless organs persist in the body. 3. These are called vestigial organs. 4. Vital organs are essential for life, so they are ruled out. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.14_

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Which of the following is listed as a vestigial organ present in the human body?

  1. Liver
  2. Kidney
  3. Heart
  4. Coccyx
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Correct answer: D. Coccyx

1. Vestigial organs are useless or non-functional structures. 2. In humans these include the tail-bone (coccyx), wisdom teeth and body hairs. 3. The coccyx appears in this list. 4. Liver, kidney and heart are vital functional organs, so they are ruled out. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.14_

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