PART - 2 - Unit V : CH - 19 Chemical Coordination and Integration — BIOLOGY STD 11 Science — Question

Osteichthyes belongs to:

1. Class amphibia.
2. Super class pisces.
3. Super class tetrapoda.
4. Division agnatha.

Male mosquitoes usually feed on:

1. Garbage.
2. Human blood.
3. Flower sap.
4. All of the above.

Adult Culex and Anopheles can be distinguished with the help of:

1. Mouth parts/ colour.
2. Sitting posture.
3. Antennae/ wings.
4. Feeding habits.

Explain oxidative phosphorylation.

Rahul's father bought an aquarium to home, while looking at the fishes, Rahul wondered that fishes, though small, can breathe efficiently in water. He wondered why do humans die of drowning. Next day, he asked his biology teacher about the same. The teacher explained that fishes have special respiratory organ, which allow them to breathe inside water. Rahul was amazed to know that even respiratory organs differ in different animal groups.

1. Give the name of the respiratory organ of fishes.
2. How do humans swim and breathe inside water?
3. Give the name of the respiratory organ of humans.
4. What values are displayed by Rahul?

During the group study at Vishalthi's home, Anil got a severe pain in his stomach. Vishakha called her mother immediately as she (mother) was a doctor. After diagnosis, stone is found in her kidney. She gave him some medicines and also suggested to drink a lot of water, so that the stone related problem does not arise again.

1. What is the medical term used for the stone in kidney?
2. Way should we drink a lot of water on the regular basis?
3. Name the ions which are involved in the formation of renal stones?
4. What values did vishakha’s mother possess?

State the number of segments in earthworm which are covered by a prominent dark band or clitellum.

1. What is florigen?
2. Which hormone breaks seed dormancy? State the mechanism involved.

How is heart failure different from cardiac arrest?