Evolution BIOLOGY - Evolution

Which one of the following character differentiate man from other mammals?

In Homo habilis, 'habilis' refers to:

Industrial melanism is an example of:

Basic principles of embryonic development were pronounced by:

________ probably lived in East African grasslands about 2 mya.

The brain capacities of Homo habilis was about ________cc.

______ evolution leads to homologous organs.

evolved into the first amphibians.

De Vries believed that single step large mutation, called caused speciation.

State two postulates of Oparin and Haldane with reference to origin of life.

Write the probable differences in eating habits of Homo habilis and Homo erectus.

How many chromosomes do drones of honeybee possess? Name the type of cell division involved in the production of sperms by them.

State Gause's Competitive Exclusion Principle.

State two postulates of Oparin and Haldane with reference to origin of life.

Select two pairs from the following which exhibit divergent evolution. Give reasons for your answer.

1. Forelimbs of cheetah and mammals.
2. Flippers of dolphins and penguins.
3. Wings of butterflies and birds.
4. Forelimbs of whales and mammals.

Select the analogous structures from the combinations given below:

1. Forelimbs of whales and bats
2. Eyes of octopus and mammals
3. Tuber of sweet potato and potato
4. Thorns of Bougainvillea and tendrils of Cucurbita

2. ​​​​​​​State the kind of evolution they represent.

1. Select the homologous structures from the combinations given below:

1. Forelimbs of whales and bats.
2. Tuber of potato and sweet potato.
3. Eyes of octopus and mammals.
4. Thorns of Bougainvillea and tendrils of Cucurbita.

2. ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​State the kind of evolution they represent.

List the two main propositions of Oparin and Haldane.

How do Darwin’s finches illustrate adaptive radiation?

Rearrange Ramapithecus, Australopithecus and Homo habilis in the order of their evolution on the Earth. Comment on their evolutionary characteristics.

How do homologous organs represent divergent evolution? Explain with the help of a suitable example.

1. Explain adaptive radiation with the help of a suitable example.
2. Cite an example where more than one adaptive radiation have occurred in an isolated geographical area. Name the type of evolution your example depicts and state why it is so named.

What is disturbance in Hardy-Weinberg genetic equilibrium indicative of? Explain how it is caused.

Vicky's mother was using the same mosquito repellent cream from last six years. She was regularly complaining that this cream has no effects on mosquitoes now. Hearing this, Vicky advised his mother to change the cream as regular usage has led the mosquitoes to develop resistance against it. His mother changed the cream and could notice its effect on mosquitoes.

1. Explain how mosquitoes were not affected by the previous cream?
2. On what factors, Darwin's theory was based?
3. Can you relate this incident to Darwin's concept? How?
4. Identify the values shown by Vicky.

Ranjana and Shilpi had a hot argument whether or not life is still originating on the earth today. Their neighbour, Mr. Kamal Mishra, a retired professor, who happened to be listening to the girls, called them and explained the matter in detail.

1. As a student of biology, what is your answer to the above problem? And why?
2. Recall the experiment of Miller, which simulated the primitive atmosphere.

1. What were the products obtained in his experiment?
2. How was energy provided in the experiment?

3. What would have been the energy source for origin of life on the earth?
4. Indicate the values shown by Mr. Kamal Mishra?

What are the key concepts in the evolution theory of Darwin?

Samya visited a zoo with her mother, on watching the cheetah, she wondered how he uses his forelimbs for running. While the same forelimbs in bats are used for flying. She wanted to know more about it and so asked her mother (a biology teacher) about it. Her mother explained her how forelimbs are modified in different animal groups for different functions.

1. What are such organs called?
2. Give an example of such organs from the plant world.
3. What led to the origin of such organs?
4. What are the values shown by Samya?

During the biology class on theories of evolution, the teacher was telling about Lamarckism. Katy was confused after listening to it and went to her teacher to clear her doubts. She asked if characters can be passed to generations, then why she does not have the tatoo that her mother has on her arm. The teacher smiled and told Katy that this is the reason why Lamarck's theory was rejected. The teacher explained her the other theories as well.

1. Name the book in which Lamarckism was explained.
2. What are the three factors of this theory?
3. What are the other theories of evolution?
4. What are the values shown by teacher?

Prehistoric cave art developed after agriculture, about 18000 years ago. True/ False

Due to continental drift, pouched mammals of Australia survived due to lack of competition. True/ False

Tyrannosaurus was the smallest among the dinosaurs. True/ False

It is believed that 3-4 mya, man-like primates walked in Eastern Africa. True/ False

The skull of baby chimpanzee is more like the adult human skull than the skull of adult chimpanzee. True/ False