Download App

Biological Classification — BIOLOGY STD 11 Science — Question

Rajasthan 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→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Briefly describe the life cycle phases of fungi.
→
In what kind of plants do you come across Kranz anatomy? To which conditions are those plants better adapted? How are these plants better adapted than the plants, which lack this anatomy?
→
In animals there are special glands secreting hormones, whereas there are no glands in plants. Where are plant hormones formed? How are the hormones translocated to the site of activity?
→
Class XI biology students attended a seminar where the speaker explained the students about the basic macromolecule found in the body, i.e., protein. He started with the monomer unit of protein and explained about different amino acids found. As amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon; they are also considered as substituted methane. Suddenly, Ajay stood up and asked about his queries based on the topic. The guest of seminar patiently explained him all the things. Ajay became satisfied and returned home happily from the seminar.
  1. What are the four substituent groups in an amino acid?
  2. Why are there so many different types of amino acids?
  3. Give the general formula of a-amino acids.
  4. Indicate the value of Ajay reflected from the above topic.
→
What happens to the valves and blood flow in the heart during ventricular diastole?
→
  1. What is the effect of substrate concentration on the action of enzyme?
  2. Distinguish between apoenzyme and coenzyme.
  3. Why are amino acids also called substituted methane?
→
How does the process of vernalisation vary among different food crop varities?
→
Write the features that distinguish between the two,
Plasma and Serum.
→
Write the name of three parasitic protozoans.
→
Compare the following :
Central neural system (CNS) and Peripheral neural system (PNS)
→