Question
Distinguish between : Single circulation and Double circulation.
✓
Answer
| Single circulation | Double circulation |
| 1. Blood flows only once through the heart in a complete cycle. | 1. Blood flows twice through the heart during one complete circulation. Systemic – to and fro ‘ from heart to body and pulmonary – to and fro from heart to lungs. |
| 2. Heart pumps deoxygenated blood only. | 2. Heart pumps both deoxygenated and oxygenated blood to lungs and body respectively. |
| 3. Blood is oxygenated in gills. | 3. Blood is oxygenated in lungs. |
| 4. Occurs only in fishes. | 4. Occurs in amphibians, reptiles, birds and mammals. |
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Observe the given food web and answer the questions
1. Name the producers in the above web.
2. Name the primary consumers in the above web.
3. Which is an omnivore animal in the above web? Why?
4. Why frog is occupying an important ecological position in this web?
5. From the given food web diagram, give the trophic levels where the eagle is present.
1. Name the producers in the above web.2. Name the primary consumers in the above web.
3. Which is an omnivore animal in the above web? Why?
4. Why frog is occupying an important ecological position in this web?
5. From the given food web diagram, give the trophic levels where the eagle is present.
Starting with the zygote, draw the diagrams of the different stages of embryo development in a dicot.
Explain the structure of spinal cord.
What is menstrual cycle? Which hormones regulate menstrual cycle?
A woman with blood group “A” marries a man with blood group “O”. Discuss the possibilities of the inheritance of the blood groups in the following starting with “yes” or “no” for each:
- They produce children with blood group “A” only.
- They produce children some with “O” blood group and some with “A” blood group.
Mrs. Sharma was eager to know the sex of the foetus, which her daughter-in-law was carrying. She was so anxious that she could pay any amount for that. The doctor refused to disclose the result of the test.
- How can one know the sex of the foetus?
- Why is disclosing the sex of the foetus banned in our country?
- What value do you learn from the doctor's act?
Represent diagrammatically the steps in amplification of a DNA segment. Who designed the process?
What precautions will you take if you are travelling in an area which has lot of mosquitoes?
Distinguish Between: Turner’s syndrome and Klinefelter’s syndrome.
Distinguish between the following:
Homologous organs and Analogous organs.
Homologous organs and Analogous organs.