Download App

Biological Classification — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBiological Classification3 Marks
Question
Bacteria as a group show the most extensive metabolic diversity. Substantiate the statement with reference to nutrition.
✓

Answer

Some bacteria are autotrophs, i.e., they synthesise their own organic food or ATP from inorganic substances, they are of two types:
  1. They may be photosynthetic autotrophs and use light energy to synthesise their food.
  2. They may be chemosynthetic autotrophs, which oxidise some inorganic compounds and use the energy released for the synthesis of their food.
Many are heterotrophs, i.e. they do not synthesise their food, but depend on an external source; they are of two types:
  1. Some are parasites and depend on living organisms for their food.
  2. Some are saprotrophs and depend on dead and decaying organic matter for food.

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 Biological Classification→Biological Classification — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Differentiate among parenchyma, collenchyma and sclerenchyma.
→
Two groups (A and B) or bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to light of wavelength 400-450nm and Group B to the light of wavelength of 500-550nm. Compare the photosynthetic rate of the two groups by giving reason.
→
Give general characters of Phylum Arthropoda.
→
Give the cause for the Heart sounds.
→
In biology period, teacher was explaining about the soil and the different nutrients essential for the growth and development of plants. She told students that out of all the elements that plants absorb, only some of them are essential for plants to grow. Rajeev had a query and asked teacher next day that how can we derive and on what basis that this particular element is essential or not for the plant?
  1. What are essential elements?
  2. Mention any four criteria that ensure the essentiality, particular element.
  3. Name some essential elements.
  4. What values you infer from Rajeev's character?
→
State the condition in which the flowers are described.
  1. Perigynous.
  2. Epigynous and.
  3. Hypogynous.
Give one example of each plant in whih these flowers are found.
→
Highlight the criteria considered for five-kingdom system of classification.
→
On a trip of North-East region, Kirti saw some plants which have big leaves in order to trap organisms. Kirti was amazed and asked her teacher about the reason for absence of such plants in other areas. Teacher replied that such plants grow on soil that is deficient in nitrogen and therefore, catch insects to fulfil their nitrogen requirements.
  1. What is the role of nitrogen in plants?
  2. Name any two insectivorous plants?
  3. What is the nature of such plants? What is the strange thing about them?
  4. Which values of Kirti one should imbibe?
→
Proteins have a primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?
→
Distinguish between: Cardiac muscle and striated muscle.
→