Question

F. The following figure represents an experiment set-up to study a physiologic
al process in
plants.
1. What is the purpose of this experiment?
2. Why is the pot covered with a polythene bag?
3. What is the structure labelled X?
4. What change would you observe in X after a
while? Explain.

G. Define the following
1. Chromosome. 2. Photolysis. 3. Stomata. 4. Osmoregulation. 5. Phagocytosis

H. Mention the function of the following:
1. Hydathodes
2. Centrosome
3. Nephron
4. RBC
5. Xylem​

Answer 1

Answer:

• Osmoregulation means control of water and salt content in body fluid and blood.
• Hydathodes are special opening for water loss in liquid form in herbaceous plants

Answer 2

Answer:

Given

Explanation:

F.

(i) The process of transpiration is demonstrated in the experiment.

(ii)The pot was covered with a plastic sheet to prevent escape of the soil water as vapour.

(iii)&(iv) since diagram is not provided in qs asked I will be unable to tell what is x.

G.

1.A chromosome is a strand of DNA that is encoded with genes

2.The splitting or decomposition of a chemical compound by means of light energy or photons is called photolysis.

3.A tiny pore in a plant leaf surrounded by a pair of guard cells that regulate its opening and closure, and serves as the site for gas exchange is called stomata.

4.The process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings is called osmoregulation.

5.Phagocytosis is the process by which certain living cells called phagocytes ingest or engulf other cells or particles.

H.

1 Hydathode is a type of pore, commonly found in angiosperms, that secretes water through pores in the epidermis or leaf margin, typically at the tip of a marginal tooth or serration.

2.A centrosome is a cellular structure involved in the process of cell division. Proteins called microtubules assemble into a spindle between the two centrosomes and help separate the replicated chromosomes into the daughter cells.

3.Nephron is functional unit of the kidney, that actually produces urine in the process of removing waste and excess substances from the blood.

4.Red blood cells contain a protein called hemoglobin, which carries oxygen from the lungs to all parts of the body.

5.Xylem supplies water and minerals to each part of plant.