describe the outbreeding device that prevents autogamy.

Describe the outbreeding devices that prevents autogamy.

Briefly, explain any four food preservation methods.

(a) Write any four factors that influence population density. (b) Draw a graph showing exponential growth curve. What is sexual deceit?

(a) Mention any four strategies adopted by flowering plants to prevent self- pollination. (b) Why is geitonogamy also referred to as genetical autogamy?

(a) Explain the application of tissue culture in any three fields. (b) Why continued inbreeding should be avoided in plants? ( c) What is germplasm collection?

(a) Explain down streaming process ? (b) What are molecular stitchers ?

a] Explain any three directional movements in plants. b] How brain and spinal cord are protected in human? c] Name the master gland present in the brain.

(a) Identify A, B, and D in the given diagram and write their names. (b) What is pollination? Explain its significance. (c) Explain the process of fertilization in flowers. Name the parts of the flower that develop after fertilization into (i) seed, (ii) fruit.

Suggest any four measures to prevent sexually transmitted diseases.