Morphology of Flowering Plants — BIOLOGY STD 11 Science — Question

Differentiate between pill and fimbriae.

How do you call the conduction of impulse along a myelinated nerve fibre?

What is hypertension? List its causative factors.

How is the mycorrhizal association helpful in absorption of water and minerals in plants?

1. Where is thyroid gland located in our body? Briefly describe its structure.
2. Write the cause of cretinism. Mention any four symptoms of this disorder.

Living state and metabolism are synonyms. JustifyOR
Without metabolism, the living state can not exist Justify.OR
Comment on the statement 'living state is a non-equilibrium steady state to be able to perform work'.

Name any three enzymes secreted by pancreas. Specify the substrate and product of each.OR
Name three enzymes secreted by pancreas and their action on proteins, fats and starch.

i. What is meant by bioassay? Name the two bioassays that are used to examine auxin activity in plants.
ii. Name the hormone that acts as an antagonist to abscisic acid. From which microorganism was it extracted initially? List two bioassays of this growth hormone.

What are the main structures in a monocot seeds? Describe with the help of suitable diagram.

Hydroponics have been shown to be a successful technique for growing of plants. Yet most of the crops are still grown on land. Why?