Download App

Evolution — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYEvolution2 Marks
Question
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.
✓

Answer

  1. Forelimbs of cheetah and mammals: This is divergent evolution and these structures are homologous.
  2. Flippers of dolphins and penguins: The example of convergent evolution they are not similar in structure but they perform a similar function.
  3. Wings of butterflies and birds: The are look same in structure, they are not atomically similar is structure though they perform similar function they called analogues.
  4. Forelimbs of whales and mammals: This is divergent evolution and these structures are homologous.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "1.5 Marks Questions" from Evolution→Evolution — all question types→BIOLOGY STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Name a genus of baculovirus. Why are they considered good biocontrol agents?
→
Find out the role of microbes in the following and discuss it with your teacher.
Soil
→
Refer the graph and answer the questions that follow.
  1. The graph depicts which type of natural selection?
  2. Explain the other two effects/ types of natural selection.
​​​​​​​
→
List five growth conditions that a bioreactor should provide for obtaining the desired product?
→
(a) Write scientific names of causal organism and vector organism of malaria and write symptoms of this disease.
(b) Write names of two diseases spread by Aedes mosquito.
→
The phenotypic and genotypic ratios in F, generation are same in a certain kind of inheritance. Name an organism in which it occurs and mention the kind of inheritance involved.
→
Suggest four important steps to produce a disease resistant plant through conventional plant breeding technology.
→
A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced ?
→
Explain mechanism of sex-determination in birds.
→
If the sequence of one strand of DNA is written as follows: 5'-ATGCATGCATGCATGCATGCATGCATG C-3' Write down the sequence of complementary strand in 5'→ 3' direction
→