Respiration In Plants — BIOLOGY STD 11 Science — Question

For completion of respiration process, write the given steps in sequential manner.

1. Diffusion of gases (O₂ and CO₂) across alveolar membrane.
2. Transport of gases by blood.
3. Utilisation of O₂ by the cells for catabolic reactions and resultant release of CO₂ .
4. Pulmonary ventilation by which atmos-pheric air is drawn in and CO₂ rich alveolar air is released out.
5. Diffusion of O₂ and CO₂ between blood and tissues.

Brinjal and potato belong to the same genus Solanum, but to two different species. What defines them as seperate species?

Write floral formula for a flower which, is bisexual; actinomorphic; pentamerous sepal, petal, stamens free with ovary, syncarpous, superior, trilocular with axile placentation.

What are plant growth regulators? Name any four different chemical nature of them with one example of each.

The essential functions of roots are anchorage and absorption of water and minerals in the terrestrial plants. What functions are associated with the roots of aquatic plants? How are the roots of aquatic plants and terrestrial plants different?

What is the role of sarcoplasmic reticulum, myosin head and F-actin during contraction of striated muscles of humans?

Mention where the following cells are located?

1. Neuroglial cells.
2. Ependymal cells.
3. Spindle cells.

Describe the arrangement of floral mem-bers in relation to their insertion on thalamus.

A student of taxonomy was puzzled when told by his professor to look for a key to identify a plant. He went to his friend to clarify what ‘Key’ the professor was refering to? What would the friend explain to him?

Distinguish between the following:
Interfasicular cambium and intrafasicular cambium.