Neural Control and Coordination — BIOLOGY STD 11 Science — Question

Deepak, (student of XI class), attended a seminar on plant growth and development. As Deepak also belongs to the farmer's family, he was enthusiastic to know upcoming experiments in the field of botany. Guest of the seminar told the students that development in plants is under the control of various intrinsic and extrinsic factors. The intrinsic factors include intracellular or genetic factors as well as intercellular factors like plant growth regulators.
Deepak asked the guest about the role of growth regulators used to improve the yield of plants. The guest speaker cleared all doubts of Arun and then Arun returned home happily from the seminar he visited.

1. What are the two groups of PGRs, based on their functions?
2. Give an example of each of the two types.
3. It is said that PGRs may function synergistically of antagonistically. What is meant by these two terms? Give an example for each.
4. What value can be learnt by the nature of Deepak (as a XI class student).

What is hemodialysis (blood dialysis)? Describe its process.

Describe the events in cardiac cycle. Explain “double circulation”.

Give comparison between the following:
Cyclic and non-cyclic photophosphorylation

Explain the structure of contractile protein in skeletal muscle.

Explain different types of blood groups and donor compatibility by making a table.

Give a brief account of mechanism of vision.

Briefly describe the cell theory.

How is the gametophyte of bryophytes different from that of gymnosperms?

Differentiate between the following:-
Red algae and brown algae