Animal Kingdom — BIOLOGY STD 11 Science — Question

Differentiate between thalamus and hypothalamus.

How does progesterone function in a human female?

Which is the most highly evolved gymnosperm? What are its features?

Blood of Pheretima is:

1. Blue with haemocyanin in corpuscles.
2. Blue with haemocyanin in plasma.
3. Red with haemoglobin in corpuscles.
4. Red with haemoglobin in plasma.

Write two functions each of Lysosome and Golgi body.

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?

What are bracteate and ebracteate flowers?

State the different modes of CO₂ transport in blood.

Name the tissue that performs the following functions:

1. Coagulation.
2. Transmission of message.
3. Clearing dead cells.
4. Haemopoiesis.