Download App

Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare3 Marks
Question
Write any four differences between bacteria and cyanobacteria.
✓

Answer

Four differences between bacteria and cyanobacteria :
S.No.BacteriaCyanobacteria
1Small cells.Comparatively large cells.
2Can have flagella.Don't have flagella.
3In some bacteria (green bacteria) photosynthesis occurs in a different way in which $O _2$ exists.Oxygen exits normally during photosynthesis as happens in green plants.
4Sexual reproduction by conjugationConjugation did not observed.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Microbes in Human Welfare→Microbes in Human Welfare — all question types→BIOLOGY STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Name the two forms of reservoir of carbon that regulate the ecosystem carbon cycle.
→
Differentiate between cleistogamous flower and chasmogamous flower.
→
The F2 progeny of a monohybrid cross showed phenotypic and genotypic ratio as 1 : 2 : 1, unlike that of Mendel’s monohybrid F2 ratio. With the help of a suitable example, work out a cross and explain how it is possible.
→
What is cancer? How is a cancer cell different from the normal cell? How do normal cells attain cancerous nature?
→
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
→
DNA separated from one cell, when introduced into another cell is able to bestow some of the properties of former to the latter. What is this change called in technical terms? Describe the experimental evidences which led to the discovery of the above phenomenon.
→
How many sperms will be produced from 100 primary spermatocytes and how many eggs will be produced from 100 primary oocytes?
→
Scutellum is the single cotyledon found in the monocot embryo only. Explain.
→
  1. Sickle celled anaemia in humans is a result of point mutation. Explain.
  2. Write the genotypes of both the parents who have produced a sickle celled anaemic offspring.
→
  1. Name the selectable markers in the cloning vector pBR322? Mention the role they play.
  2. Why is the coding sequence of an enzyme (â-galactosidase) a preferred selectable marker in comparison to the ones named above?
→