Tiwari Academy Discussion

Parul

Asked: October 15, 2021In: Class 12 Biology

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

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Parul

Asked: October 15, 2021In: Class 12 Biology

In an aquarium two herbivorous species of fish are living together and feeding on phytoplanktons. As per the Gausses principle, one of the species is to be eliminated in due course of time, but both are surviving. How? And what possibly happened to both the species?

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

Sushant Joshi

Asked: October 15, 2021In: Class 12 Biology

Describe the role of Agrobacterium tumefaciens in transforming a plant cell.

Class 12 Science Biology Important Questions Class 12th Biology NCERT Based Questions Answers Class 12th Biology Sample paper Questions Class 12th Science Session 2022-2023

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.

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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.

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Shikha Avasti

Asked: October 15, 2021In: Class 12 Biology

What is hybrid vehicle technology. Explain the advantages with a suitable example?

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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

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

Divya datt

Asked: October 15, 2021In: Class 12 Biology

Rose plants produce large, attractive bisexual flowers but they seldom produce fruits. On the other hand Lady’s finger produces plenty of fruits. Analyse the reasons for failure of fruit formation in rose.

12th Science Biology Questions Answers Class 12th Biology Sample paper Questions Class 12 Science Biology Solutions Class 12 Science Biology Terminal Exams Solutions

Rahul Goyal

Asked: October 15, 2021In: Class 12 Biology

Is it true that if the dissolved oxygen level drops to zero the water will become septic. Give an example which could lower the dissolved oxygen content of an aquatic body.

Class 12th Biology NCERT Based Questions Answers 12th Biology Terminal Exam Based Extra Questions Class 12 Science Important Syllabus Questions Answers

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

In an aquarium two herbivorous species of fish are living together and feeding on phytoplanktons. As per the Gausses principle, one of the species is to be eliminated in due course of time, but both are surviving. How? And what possibly happened to both the species?

Describe the role of Agrobacterium tumefaciens in transforming a plant cell.

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

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.

What is hybrid vehicle technology. Explain the advantages with a suitable example?

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

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

Rose plants produce large, attractive bisexual flowers but they seldom produce fruits. On the other hand Lady’s finger produces plenty of fruits. Analyse the reasons for failure of fruit formation in rose.

Is it true that if the dissolved oxygen level drops to zero the water will become septic. Give an example which could lower the dissolved oxygen content of an aquatic body.

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