Question

What are ex-plants ? Mention their role.
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प्रतिजैविक क्या हैं ? किन्हीं दो के स्रोत बतायें।
What are antibiotics ? Name sources
महत्व बतायें।​

Answer 1

Answer:

In humans, explants derived from placentas collected from term pregnancy are predominantly used for studying villous function, including transport, viability, and expression of hormones, cytokines, and growth factors.

Answer 2

Answer:

Explant is a tissue, piece of a part of plant which is used for plant tissue culture.

Antibiotics are the chemical substances  which are produced by a living organism that may kill or stop the growth of diseases causing microorganisms.

Sources of antibiotics fungi and bacteria. 

Explanation:

• Plant tissue culture is to  grow exercised plant part on a nutrient media.
• It has broad application and many roles in different areas their main role is divied into 3 categories basic research, environmental issues, and commercial applications. 
• In basic research we understand the physiology of molecular pathways where as environmental issues covers the strategies to preserve the germplasm for a longer time.

Sources of antibiotics

• Pencillin-Penicillium chrysogenum, P.notatum + Phenyl Acetic Acid
• Nystatin-Streptomyces noursei
• Streptomycin-Streptomyces griseus