Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

What are macromolecule? Give examples

Explain Blackman's law of limiting factors. Explain it with the help of a suitable example.

Differentiate between fibrous joints and cartilaginous joints with an example of each.

Can girdling experiments be done in monocots? If yes, How? If no, why not?

All birds have:

1. Internal fertilization, are oviparous and eggs are covered with calcareous shell.
2. Nests to care their babies.
3. Feather on their body and can fly.
4. Oil gland at the base of tail.

Name two eukaryotic cells that lack a nucleus.

Give any four important characteristics of mycoplasma.

What do you understand by biosynthetic phase of photosynthesis?

Rashi, a class VII student was sitting with her mother (who is an editor for Biology). Her mother was insisting her to have some fruits to which Rashi refused repeatedly. Her mother tried convincing her by saying that proper diet is important for growth. Rashi argued saying that even plants grow without taking any food. To this, her mother smiled and explained her how plants make food with the help of leaves.

1. Name the term used for the process of food production in plants.
2. What are the factors required by plants for this process?
3. What are the additional function of leaves.
4. What values are shown by Rashi's mother?

The role of ethylene and abscisic acid is both positive and negative. Justify the statement.