Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

Which type of fungi are lignocolous fungi which produce bracket fungi?

What different criteria would you choose to classify people that you meet often? (Hint: Dress, mother tongue, region in which they live, economic status etc.)

Differentiate between collenchyma and sclerenchyma.

Answer the following:

1. Name the excretory organs of cockroach.
2. Where are these located?
3. What is their function?
4. Which other excretory organs also help in excretion?

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?

Seeds of some plants germinate immediately after shedding from the plants while in other plants they require a period of rest before germination. The later phenomena is called as dormancy. Give the reasons for seed dormancy and some methods to break it.

Differentiate between monocytes and eosinophils.

Which end of the polypeptide has the first amino acid and which end has the last amino acid? How are they referred to as, respectively?

Describe the characteristics of the cell of Phacophyceae.