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Organisms Used in Laboratory Work

Telangana Open School (TOSS) · Class 12 · Biology

Quick revision notes for Organisms Used in Laboratory Work — Telangana Open School (TOSS) Class 12 Biology. Key concepts, formulas, and definitions for last-minute revision.

53 questions30 flashcards4 concepts

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Key Topics to Revise

1

Common Organisms Cultured in the Laboratory

  • Organisms are cultured for morphological, taxonomic, cytological, genetic, and behavioral studies.
  • Commonly cultured organisms include: Amoeba, Paramecium, Hydra, Rhizopus (bread mould), Drosophila (fruit fly), and onion root tips.
  • These organisms are chosen due to their ease of culture, short life cycle, and clear observable features under the microscope.
2

Methods of Culturing Organisms

  • Culturing requires knowledge of habitat, collection method, growth medium, and preservation techniques.
  • Paramecium is cultured in jars with decaying grass and leaves to promote bacterial growth (its food).
  • Amoeba is cultured in petri dishes with wheat or rice grains in water, kept in dark and cool conditions.
3

Laboratory Equipment and Safety Measures

  • Vasculum is a metal cylinder with a sliding door used to carry plant specimens during field trips.
  • Plant press (field and lab types) is used to dry and preserve plant specimens for herbarium preparation.
  • Nets like plankton nets, insect nets, and biological dredges are used to collect aquatic and flying organisms.

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Key Concepts

Culturing means growing organisms inOrganisms like AmoebaTools like netsProper ventilation

Frequently Asked Questions

What are the important topics in Organisms Used in Laboratory Work for Telangana Open School (TOSS) Class 12 Biology?
Organisms Used in Laboratory Work covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Organisms Used in Laboratory Work — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 53 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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