Divergent Evolution

Q.

Describe one example of adaptive radiation.

Q.

Explain homologous organs.

Q.

What do you mean by divergent evolution?

Q. "Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection." Explain. [3 Marks]

Q. Darwin's finches are good examples of

1. mass extinction
2. convergent evolution
3. industrial melanism
4. adaptive radiation

Q.

Are Dinosaurs still alive?

Q.

Homologous organs have

1. Same origin and same function

2. Same origin and different function

3. Different origin and same function

4. Different origins and different function

Q.

When two species of different genealogy come to resemble each other as a result of adaptation the phenomenon is termed:

1. Convergent evolution

2. Coevolution

3. Divergent evolution

4. Microevolution

Q. All vertebrates including human develops a row of vestigial gill slit just behind the head but it is a functional organ only in fish and not found in any other adult vertebrates. It gives the evidence of

1. Adaptive evolution
2. Divergent evolution
3. Convergent evolution
4. Embryological evolution

Q. (a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita

(b) State the kind of evolution they represent. [2]

Q.

What are the various evidences in the favour of evolution?

Q. The given bones in the forelimbs of three mammals figure shows.

For these mammals, the number, position, and shape of the bones must likely indicates that they may have

1. identical methods of obtaining food
2. identical genetic makeup
3. similar original ancestor
4. developed in a common environment

Q.

What evidences come from homologous organs and analogous organs in favor of evolution?

Q. Which of the following is not an example of organs showing convergent evolution?

1. Eye of Octopus and mammals
2. Sweet potato and potato
3. Wings of butterfly and birds
4. Forelimbs of whales and bats

Q. Differentiate between convergent and divergent evolution with an example.

Q.

What is the explanation for the survival of green beetles in red beetles population, where crows are predators? How is it possible?

Q.

What is divergent evolution?

Q. Which of the following includes analogous structures?

1. Wings of bat and pigeon
2. Vertebrate hearts and brains
3. Thorns of Bougainvillea and tendrils of Cucurbita
4. Flippers of dolphin and forelimbs of horse

Q.

What is the difference between homologous and analogous structures ?

Q. Recognise the figure and find out the correct matching.

1. a-tendril, b-thorn, c-$Cucurbita$, d-$Bougainvillea$
2. b-tendril, a-thorn, d-$Cucurbita$, c-$Bougainvillea$
3. b-tendril, a-thorn, c-$Cucurbita$, d-$Bougainvillea$
4. a-tendril, b-thorn, c-$Cucurbita$, d-$Bougainvillea$

Q.

The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because:

1. they share a common ancestor

2. they perform the same function

3. one organism has given rise to another

4. they have biochemical similarities

Q. The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because

1. They perform the same function
2. They share a common ancestor
3. One organism has given rise to another
4. They have biochemical similarities

Q. Differentiate between divergent and convergent evolution. Given one example of each.

Q. Plant species shows several morphological variations in response to altitudinal gradient. When grown under similar conditions of growth, the morphological variations disappear and all the variants have common morphology. What are these variants called?

Q. An evolutionary pattern characterized by a rapid increase in the number and kinds of closely related species is called

1. Convergent evolution
2. Divergent evolution
3. Adaptive radiation
4. Parallel evolution

Q. Explain the convergent and divergent evolution with suitable examples.

Q.

Formation of one or more spaces from an ancestor species is what speciation

Q.

Which one of the following is considered as common ancestor of old world monkeys, apes and man?

Q. Adaptive radiation is a type of ___ evolution.

1. convergent
2. divergent
3. parallel
4. linear

Q. Smallest unit to evolve through natural selection is

1. Cell
2. Clade
3. Organism
4. Population
5. Species