Adaptive Radiation

Q.

Why is genetic variation important for evolution?

Q. Mac Arthur observed that five closely related species of Warblers living on the same tree were able to avoid competition and co-exist due to

1. Behavioural differences in their foraging activities
2. Cooperation in their foraging efforts
3. All of the above
4. Different kinds of insects they eat

Q. Darwin's finches are a good example of

1. convergent evolution
2. adaptive radiation
3. industrial melanism
4. connecting link

Q.

Adaptive radiation is an example of [1]

(a) divergent evolution

(b) convergent evolution

(c) parallel evolution

(d) randomised evolution

Q. Mammals resembling horse, hippopotamus, bear and rabbit were once found only in South America, but they disappeared due to __________.

1. Genetic drift
2. Continental drift
3. Hitting of asteroid
4. Industrial revelution

Q.

What is Darwins theory of evolution?

Q.

The wings of bat, locust and pigeon are the example of -

1. Homologous organs

2. Analogous organs

3. Vestigial organs

4. Exoskeleton

Q.

What Is The Best Definition For Biological Evolution?

Q.

What is the smallest biological unit that can evolve?

Q.

why is that the eye of the octopus and mammals come under analogous structure when its basic structure is same? If brains of fish and mammals can come under homologous structures because of its basic structure then why not the eye?

Q.

Two different species cannot live for a long duration in the same niche or habitat. This law is :

1. Allen's law

2. Gause's law

3. Competitive exclusion principle.

4. Weissman's theory

Q.

Define homologous and analogous organs.

Q. How do homologous organs represent divergent evolution? Explain with the help of a suitable example. [3]

Q. Write the names of the following : [1]
(a) A 15 mya primate that was ape-like.
(b) A 2 mya primate that lived in East African grasslands.

Q.

Hand of man, wing of bat and flipper of seal represent:

1. Vestigeal organs

2. Evolutionary organs

3. Homologous organs

4. Analogous organs

Q. Give an example for adaptive radiation.

Q. Adaptive radiation is a type of ___ evolution.

Q. Which of the following is/are the example(s) of adaptive radiation?

1. Darwin's finches
2. Human arms and wings of birds
3. Australian marsupials
4. Thorn and tendrils

Q. The origin of different types of finches on Galapagos islands is an example of :

1. Divergent evolution
2. Convergent evolution
3. Adaptive radiation
4. Both B and C

Q. According to Darwin, the finches of Galapagos islands provide an evidence in favour of _______________.

Q. Australian marsupials and placental mammals are suitable examples of adaptive radiation and convergent evolution. Explain giving reasons.

Q. What is adaptive radiation? Give one example.

Q.

Where Can Opposite Phyllotaxy Be Seen?

Q. Adaptive radiation refers to

1. Adaptation in an individual to a variety of environments
2. Evolution of many different species from a common ancestor
3. Migration of members of a species to different geographical areas
4. Adaptations due to geographical isolation

Q.

Hand of man, wings of bat and flippers of seal represent?

1. Vestigial organs

2. Analogous organs

3. Evolutionary organs

4. Homologous organs

Q. Differentiate between homology and analogy. Give one example of each. [3]

Q. Which of these are examples of evolution by anthropogenic action?
(i) Adaptive radiation of marsupials of Australia.
(ii) Appearance of antibiotic resistant microbes.
(iii) Evolution of finches in Galapagos islands.
(iv) Appearance of dark winged moth in England during post industrialisation period.
(v) Convergent evolution of placental mammals in Australia.

1. (i) and (ii)
2. (v) only
3. (ii) only
4. (ii) and (iv) only
5. (iii) and (v) only

Q.

What is biological evolution?

Q. When more than one adaptive radiation appeared to have occured in an isolated geographical area. it is called ?

1. Divergent evolution
2. Convergent evolution
3. Saltation
4. Anthropogenic evolution

Q. According to Darwin, the finches of Galapagos islands provide an evidence in favour of _______________.