Question

1. Expand 5R principle? And write few biodegradable substances. 3marks
2. Give an example where sex is determined by environmental factors.
3. In a cross between plants with pink flowers and plants with white flowers the offsprings of F1
generation all had pink flowers. When the F1 generation was self-crossed, it was observed in the F2
generation that out of 100, 75 flowers were pink. Make a cross and answer the following:
i) What are genotypes of the F1 generation?
ii) What is the ratio of pink : white flowers in the F2 generation?
4. Why Mendel selected pea plant for his experiments? How many chromosomes are present in
human beings?
5. Suggest any five activities in daily life, which are eco-friendly.

Answer 1

Answer:

thanks for free points

Answer 2

Question ⤵

Explain 5R principle? And write few biodegradable substances.

❇ Answer ⬇

➡ It is necessary to adopt/focus on 5R principles (Reduce, Reprocess, Reuse, Recycle and Recover) of waste management for sustainable development.

➡ Canteens generate biodegradable waste that is rich in carbon along with nitrogen, phosphorous and potassium is converted to manure using organic waste converter.

Thank you.