Plant Growth and Mineral Nutrition — BIOLOGY STD 12 Science — Question

Describe in brief an account of disorders of the thyroid.
OR
What are the functional disorders of thyroid gland? Describe in brief.

Complete the table.

Event	Physical process
1. Soaking of Seeds	—————-
2. Water entering guard cells	—————-
3. Exchange of gases	—————
4. Loss of water in liquid form	—————
5. Water coming out through earthen pot	—————
6. Loss of water in vapour form	—————
7. Absorption of solutes passively by carrier	—————
8. Spreading of fragrance of incense stick	—————

Your school’s athletic team along with the athletic teams from different schools reach the venue two days before the inter district school athletic event was to be held. A day before the competition, a team of officials from an agency arrive and ask for blood and urine samples from all the participating athletes.

1. Would you support or object to this sample collection? Provide explanation to your answer.
2. Write a note that you would like to read out to your team-mates to explain the purpose of this visit of these officials.

Mention any two autosomal genetic disorders with their symptoms.

1. How do organic farmers control pests? Give two examples.
2. State the difference in their approach from that of conventional pest control methods.

Why and when do the leucocytes perform diapedesis?

What are the modes of transmission of HIV or AIDS?

Name the hormones secreted by the adrenal cortex and state their role.

Lac culture.

Microbes in industrial vitamin production.