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Home/class 12 science biology solutions

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Ratan Rai
Ratan Rai
Asked: October 18, 2021In: Class 12 Biology

What are the basic characteristics of a modern land fill sites. List any three and mention the reasons for their use.

Class XII Science Biology Solutions 12th Biology Terminal Exam Based Extra Questions Class 12th Biology Sample paper Questions 12th Biology Science Session 2022-23

class 12 science biology solutionsclass 12th science session 2021-2022
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Answer
Haldi Ram
Haldi Ram
Asked: October 18, 2021In: Class 12 Biology

Define transgenic animals. Explain in detail any four areas where they can be utilised.

Class XII Science Biology Solutions 12th Biology NCERT Syllabus Questions 12th Biology Science Session 2022-23 12th Biology Terminal Exam Based Extra Questions

12th biology science session 2021-22class 12 science biology solutions
  • 1 1 Answer
  • 10 Views
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Charlie
Poll
Charlie
Asked: October 18, 2021In: Class 12 Biology

Select the options that are true for both asexual and sexual reproduction from the options given below:

A few statements describing certain features of reproduction are given below: i. Gametic fusion takes place ii. Transfer of genetic material takes place iii. Reduction division takes place iv. Progeny have some resemblance with parents

12th biology science session 2021-22class 12 science biology solutions
  • 1 1 Answer
  • 9 Views
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Answer
Ratan Rai
Ratan Rai
Asked: October 18, 2021In: Class 12 Biology

Write a short note on electronic waste. List the various sources of e- wastes and the problems associated with the disposal of e-waste.

Class 12 Science Biology Important Questions Class 12th Biology Sample paper Questions 12th Biology NCERT Syllabus Questions Class 12 Science Biology Terminal Exams Solutions

12th biology science session 2021-22class 12 science biology solutions
  • 1 1 Answer
  • 12 Views
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Parul
Parul
Asked: October 15, 2021In: Class 12 Biology

Elaborate how invasion by an alien species reduces the species diversity of an area.

Class XII Science Biology Extra Questions Class 12th Biology Sample paper Questions 12th Biology Terminal Exam Based Extra Questions 12th Biology NCERT Syllabus Questions

12th biology science session 2021-22class 12 science biology solutions
  • 2 2 Answers
  • 24 Views
  • 2 Votes
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Sushant Joshi
Sushant Joshi
Asked: October 15, 2021In: Class 12 Biology

Describe critically the main ideas behind the biological control of pests and diseases.

Class XII Science Biology Extra Questions Class XII Science Biology Solutions 12th Biology NCERT Syllabus Questions 12th Biology Science Session 2022-23

class 12 science biology solutionsclass 12th science session 2021-2022
  • 1 1 Answer
  • 14 Views
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Divya datt
Divya datt
Asked: October 15, 2021In: Class 12 Biology

Embryo sacs of some apomictic species appear normal but contain diploid cells. Suggest a suitable explanation for the condition.

12th Science Biology Extra Questions Class 12th Science Session 2022-2023 12th Biology Terminal Exam Based Extra Questions Class 12th Biology NCERT Based Questions Answers

12th biology science session 2021-22class 12 science biology solutions
  • 1 1 Answer
  • 5 Views
  • 2 Votes
Answer
Vijay Raj
Vijay Raj
Asked: October 15, 2021In: Class 12 Biology

Although sexual reproduction is a long drawn, energy-intensive complex form of reproduction, many groups of organisms in Kingdom Animalia and Plantae prefer this mode of reproduction. Give atleast three reasons for this.

12th Biology Terminal Exam Based Extra Questions Class 12th Biology NCERT Based Questions Answers Class 12 Science Important Syllabus Questions Answers Class 12th Science Session 2022-2023

12th biology science session 2021-22class 12 science biology solutions
  • 1 1 Answer
  • 5 Views
  • 2 Votes
Answer
Somvati
Somvati
Asked: October 15, 2021In: Class 12 Biology

How do scientists extrapolate the total number of species on Earth?

Class 12th Biology Sample paper Questions Class 12th Biology NCERT Based Questions Answers Class XII Science Biology Solutions

12th biology science session 2021-22class 12 science biology solutions
  • 1 1 Answer
  • 6 Views
  • 2 Votes
Answer
Shilpi
Shilpi
Asked: October 15, 2021In: Class 12 Biology

What role does pituitary gonadotrophins play during follicular and ovulatory phases of menstrual cycle and also explain the shift in steroidal secretions.

Class XII Science Biology Extra Questions Class XII Science Biology Solutions Class 12 Science Biology Terminal Exams Solutions Class 12th Biology Sample paper Questions

12th biology science session 2021-22class 12 science biology solutions
  • 1 1 Answer
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