Write the general characteristics of Protista class.

Question

✓

Answer

The characteristics of Protista class are as follows
(i) Most protists are aquatic, unicellular and eukaryotic microorganisms.
(ii) Duplication of chromosomes has a clear role in cell division.
(iii) Some protists are photosynthetic but some are predators or are parasites and some saprophytes.
(iv) Organelles are present and membrane bound and 80 S types of ribosomes are found.
(v) Asexual reproduction occurs by binary fission or multiple fission.
(vi) Sexual reproduction occurs by the fusion of two nuclei i.c. by syngamy
(vii) Movement occurs through cilia, flagellum, pseudopodia or contractile fibrils.

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 PART - 1 - Unit I : CH - 2 Biological Classification→PART - 1 - Unit I : CH - 2 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

Write the difference between first meiosis and second meiosis.

→

Give reasons for the following.

Plants are the lungs of nature.
Chlorophyll-b and other accessory pigments are necessary for photosynthesis.
In the high light intensities, the chlorophyll-a gets damaged.

→

All the organ systems work in perfect harmony and thus all the life processes continue. This is similar to which of the following? How can taking care of the digestive system help us in maintaining a healthy body?

All the musical instruments play in perfect harmony and thus the wonderful music is created.
All the players in a team play to their ability and thus the team wins.
You should be good at quantitative, linguistic and reasoning skills to excel in your studies.

→

(i) In aerobic respiration the respiratory coefficient is infinite. Please explain.
(ii) Define the following: (a) Floating respiration (b) Protoplasmic respiration (c) External respiration (d) Internal respiration.

→

There are 26 bones in the vertebral column of a human adult. Categorise them on the basis of their location and mention the specific number in each of the categories.

→

Name the two important enzymes of C₃ and C₄ pathways, respectively? What important role do they play in fixing CO₂?

→

Auxins are growth hormones capable of promoting cell elongation. They have been used in horticulture to promote growth, flowering and rooting. Explain the meaning of the following terms related to auxins.