PART - 2 - Unit IV : CH - 13 Plant Growth and Development — BIOLOGY STD 11 Science — Question

Which important organs are affected by high blood pressure? Name any two.

What will be the effect on the amount of urine released when water is abundant in the body tissues in case of vertebrates?

In flat worms, exchange of O₂ and CO₂ takes place with the help of which organ?

1. Name the specialised cells where nitrogen fixation occurs in the trichomes of certain cyanobacteria.
2. Give two examples of cyanobacteria where such cells are present.

Name the two functional groups present in an amino acid.

Mention the possible location in the chloroplast, where cyclic flow of electrons (cyclic photophosphorylation) occurs.

Classify the following as warm-blooded and cold-blooded organisms: Rana, Scoliodon, Penguin, Blue-whale.

Which pigment is responsible for the colour of carrot?

We commonly call ATP as the energy currency of the cell, why? Can you think of some other energy carriers present in a cell? Give name any two.

What kind of muscle fibres are richly found in the extensor muscles of the back? What characteristics enable these fibres to serve their purpose?