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In a family, ...

Question

In a family, a girl and her brother are said to be more closely related as compared to girl and her first cousin on evolutionary basis. Identify the correct statement based on this information.

Statement 1: They have a common ancestor in the second generation.

Statement 1: They have a common ancestor in the first generation.

A

Only statement 1 is correct

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B

Only statement 2 is correct

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C

Both the statements are correct

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D

Both the statements are incorrect

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Solution

The correct option is B Only statement 2 is correct
Girl will be more closely related to her brother as compared to her first cousin because girl and her brother share a common ancestor in the first generation i.e., their parents. On the other hand, she shares a common ancestor (grand parents) in the second generation with her cousin.

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Q. In a family, a girl and her brother are said to be more closely related as compared to girl and her first cousin on evolutionary basis. Identify the correct statement based on this information.

Statement 1: They have a common ancestor in the second generation.

Statement 1: They have a common ancestor in the first generation.

Q. Scientists are studying the evolutionary history of two closely related mammal species. They identify the earliest known evidence of each species and the most recent bones of the presumed common ancestor. The data is recorded in the chart.

	Common Ancestor Bones	Species 1 Bones	Species 2 Bones
Location	Asia and North America	North America	Asia
Age (years)	15,000	5,000	6,000

Based on the data, which of the following is a reasonable estimate of when populations of the common ancestor became reproductively isolated?

Q. Lu Yang is a girl in a small village in ancient China. Her family is quite religious, and they believe in many values such as truth and honesty. They pray to their ancestors in times of trouble.

Which of the following religions do you think Lu Yang's family might have been practising?

Q. Given below are the characteristics of the human ancestors.
(i)-They are the first human-like beings.
(ii)-They buried their dead.
(iii)-The fossils of this human ancestor were discovered in Java in 1891.
Based on these characteristics, identify the human ancestors and arrange them in the decreasing order of their cranial capacity.

Q. Some dinosaurs had feathers although they could not fly. Birds have feathers that help them to fly. Identify the correct statement based on this information.

Statement 1: Reptiles have evolved from birds

Statement 2: There is no evolutionary connection between reptiles and birds.

Statement 3: Birds have evolved from reptiles

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