Correct the statements a. Cells shrink | Class 11 Biology Chapter Transport in Plants, Transport in Plants NCERT Solutions

Define a taxon. Give some examples of taxa at different hierarchical levels.

What are the steps involved in formation of a root nodule?

Medicines are either man made (i.e., synthetic) or obtained from living organisms like plants, bacteria, animals etc. and hence the latter are
called natural products. Sometimes natural products are chemically altered by man to reduce toxicity or side effects. Write against each of
the following whether they were initially obtained as a natural product or as a synthetic chemical.
a. Penicillin ___________________________
b. Sulfonamide ___________________________
c. Vitamin C ___________________________
d. Growth Hormone ___________________________
 

Algae are known to reproduce asexually by variety of spores under different environmental conditions. Name these spores and the conditions under which they are produced.

Write a few lines about Gout.

What are three major types of cells found in the gastric glands? Name their secretions.

Give the biochemical events occurring in the root nodule of a pulse plant. What is the end product? What is its fate?

It is said that the one cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies
the maximum part of cell cycle?
 

Stolon, offset and rhizome are different forms of stem modifications. How can these modified forms of stem be distinguished from each other?

We find that Rhizobium forms nodules on the roots of leguminous plants. Also Frankia another microbe forms nitrogen fixing nodules on the roots of non-leguminous plant Alnus.
a. Can we artificially induce the property of nitrogen fixation in a plant – leguminous or non-leguminous?
b. What kind of relationship is observed between mycorrihiza and pine trees?
c. Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of one example.