Case Based Questions Test: Heredity & Evolution - Class 10 MCQ
19 Questions MCQ Test - Case Based Questions Test: Heredity & Evolution
Read the below passage and answer the following question:
Meena studied the forelimbs of three organisms and she found that organism X had long and short bones, covered with muscles, which are used for running. The organism Y had long and short bones, covered with feathers used for flying. The organism Z has a layer of a complex chemical with supporting framework which is not made of bones and which is used for flying.
Q. Analogous structures are
Read the below passage and answer the following question:
Meena studied the forelimbs of three organisms and she found that organism X had long and short bones, covered with muscles, which are used for running. The organism Y had long and short bones, covered with feathers used for flying. The organism Z has a layer of a complex chemical with supporting framework which is not made of bones and which is used for flying.
Q. The name given to the forelimbs of organisms X and Y?
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Read the below passage and answer the following question:
Meena studied the forelimbs of three organisms and she found that organism X had long and short bones, covered with muscles, which are used for running. The organism Y had long and short bones, covered with feathers used for flying. The organism Z has a layer of a complex chemical with supporting framework which is not made of bones and which is used for flying.
Q. The name is given to the forelimbs of organisms Y and Z is:
Read the below passage and answer the following question:
Fossils are formed layer by layer in a sequence. It is a slow process that is totally dependent on where the organism dies. In the ocean, fossils are settled at the bottom in the soil or sand. In the course of time, these layers changed into rocks due to the presence of the water above and also due to chemical reactions. The distribution pattern of fossils shows that the ancient fossils present in the bottom rocks are simple, while the most recent fossils found in the upper strata are highly evolved. It means fossils form and become more and more complex as we proceed from earliest to recent rocks.
Q. If the fossil of an organism is found in the deeper layers of earth, then we can predict that
Read the below passage and answer the following question:
Fossils are formed layer by layer in a sequence. It is a slow process that is totally dependent on where the organism dies. In the ocean, fossils are settled at the bottom in the soil or sand. In the course of time, these layers changed into rocks due to the presence of the water above and also due to chemical reactions. The distribution pattern of fossils shows that the ancient fossils present in the bottom rocks are simple, while the most recent fossils found in the upper strata are highly evolved. It means fossils form and become more and more complex as we proceed from earliest to recent rocks.
Q. Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
Read the below passage and answer the following question:
Fossils are formed layer by layer in a sequence. It is a slow process that is totally dependent on where the organism dies. In the ocean, fossils are settled at the bottom in the soil or sand. In the course of time, these layers changed into rocks due to the presence of the water above and also due to chemical reactions. The distribution pattern of fossils shows that the ancient fossils present in the bottom rocks are simple, while the most recent fossils found in the upper strata are highly evolved. It means fossils form and become more and more complex as we proceed from earliest to recent rocks.
Q. Which of these statements is correct about the importance of fossils in the study of organic evolution?
Read the below passage and answer the following question:
Fossils are formed layer by layer in a sequence. It is a slow process that is totally dependent on where the organism dies. In the ocean, fossils are settled at the bottom in the soil or sand. In the course of time, these layers changed into rocks due to the presence of the water above and also due to chemical reactions. The distribution pattern of fossils shows that the ancient fossils present in the bottom rocks are simple, while the most recent fossils found in the upper strata are highly evolved. It means fossils form and become more and more complex as we proceed from earliest to recent rocks.
Q. Which of the following constitutes a fossil?
Read the below passage and answer the following question:
Fossils are formed layer by layer in a sequence. It is a slow process that is totally dependent on where the organism dies. In the ocean, fossils are settled at the bottom in the soil or sand. In the course of time, these layers changed into rocks due to the presence of the water above and also due to chemical reactions. The distribution pattern of fossils shows that the ancient fossils present in the bottom rocks are simple, while the most recent fossils found in the upper strata are highly evolved. It means fossils form and become more and more complex as we proceed from earliest to recent rocks.
Q. Which of these organisms is fossilized?
Read the passage and answer the following questions:
There were three animals: A, B and C. Animal A can fly but animal B can only run on ground or walls. However, the forelimbs of animal A and B, both have the same basic design but they were used for different purposes such as flying and running respectively. The animal C became extinct a long time ago. The study of fossils of animal C tells us that it had some features like those of A and some like those of B. In fact, animal C is said to form a connecting link in the evolutionary chain of A and B.
Q. The animal C is
Read the passage and answer the following questions:
There were three animals: A, B and C. Animal A can fly but animal B can only run on ground or walls. However, the forelimbs of animal A and B, both have the same basic design but they were used for different purposes such as flying and running respectively. The animal C became extinct a long time ago. The study of fossils of animal C tells us that it had some features like those of A and some like those of B. In fact, animal C is said to form a connecting link in the evolutionary chain of A and B.
Q. Which is the correct evolutionary chain involving A, B and C.
Read the passage and answer the following questions:
There were three animals: A, B and C. Animal A can fly but animal B can only run on ground or walls. However, the forelimbs of animal A and B, both have the same basic design but they were used for different purposes such as flying and running respectively. The animal C became extinct a long time ago. The study of fossils of animal C tells us that it had some features like those of A and some like those of B. In fact, animal C is said to form a connecting link in the evolutionary chain of A and B.
Q. A belongs to _______ and B belongs to _________ group respectively.
Read the passage and answer the following questions:
There were three animals: A, B and C. Animal A can fly but animal B can only run on ground or walls. However, the forelimbs of animal A and B, both have the same basic design but they were used for different purposes such as flying and running respectively. The animal C became extinct a long time ago. The study of fossils of animal C tells us that it had some features like those of A and some like those of B. In fact, animal C is said to form a connecting link in the evolutionary chain of A and B.
Q. Select the correct statement.
Read the passage and answer the following questions:
There were three animals: A, B and C. Animal A can fly but animal B can only run on ground or walls. However, the forelimbs of animal A and B, both have the same basic design but they were used for different purposes such as flying and running respectively. The animal C became extinct a long time ago. The study of fossils of animal C tells us that it had some features like those of A and some like those of B. In fact, animal C is said to form a connecting link in the evolutionary chain of A and B.
Q. _____________ name is given to the forelimbs like those of A and B, which have the same basic design but different functions?
Read the passage and answer the following questions:
Seema crossed purebred pea plants having round-yellow seeds with wrinkled green seeds and found that only A-B type of seeds were produced in the F1 generation. When F1 generation pea plants having A-B type of seeds were crossbreed by self pollination, then in addition to the original round yellow and wrinkled green seeds, two new varieties A-D and C-B types of seeds were also obtained.
Q. What are A-B types of seeds?
Read the passage and answer the following questions:
Seema crossed purebred pea plants having round-yellow seeds with wrinkled green seeds and found that only A-B type of seeds were produced in the F1 generation. When F1 generation pea plants having A-B type of seeds were crossbreed by self pollination, then in addition to the original round yellow and wrinkled green seeds, two new varieties A-D and C-B types of seeds were also obtained.
Q. A-D are __________ and C-B are _______ type of seeds.
Read the passage and answer the following questions:
Seema crossed purebred pea plants having round-yellow seeds with wrinkled green seeds and found that only A-B type of seeds were produced in the F1 generation. When F1 generation pea plants having A-B type of seeds were crossbreed by self pollination, then in addition to the original round yellow and wrinkled green seeds, two new varieties A-D and C-B types of seeds were also obtained.
Q. The above cross is known as
Read the passage and answer the following questions:
In a cross between plants with purple flowers and plants with white flowers, the offspring of F1 generation all had white flowers. When the F1 generation was self-crossed, it was observed in the F2 generation that out of 100, 75 flowers were white. Make a cross and answer the following questions:
Q. The ratio of ‘White: Purple’ flowers in the F2 generation is
Study the given cross showing self pollination in F1 and answer the questions
RRYY × rryy Parents
(Round Yellow) (Wrinkled Green)
RrYy × ________ F1 generation
(Round Yellow)
Q. The missing black in the above cross is:
Study the given cross showing self pollination in F1 and answer the questions
RRYY × rryy Parents
(Round Yellow) (Wrinkled Green)
RrYy × ________ F1 generation
(Round Yellow)
Q. The ratio of the combination of characters in the F2 progeny is:
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