Chrysophytes
Trending Questions
Q.
What are the characteristics of euglenoids?
Q.
Why are algae green in color?
Q.
What are chrysophytes?
Q. The chief producers in the oceans, which are also known to form diatomaceous earth belong to
- Euglenoids
- Chrysophytes
- Plantae
- Dinoflagellates
Q.
Is Euglena a plant or animal?
Q. Which group of Protists are responsible for the formation of diatomaceous earth?
- Chrysophytes
- Dinoflagellates
- Slime Moulds
- Euglenoids
Q. Which of the following organisms are known as chief producers in the oceans ?
- Cyanobacteria
- Diatoms
- Dinoglagellates
- Euglenoids
Q.
Are Desmids Chrysophytes?
Q.
Why are chrysophytes known as diatoms?
Q.
What are 2 example of dinoflagellates?
Q.
What is unique about diatoms?
Q.
Which organism Is described as the jewel of the sea?
Q.
Why do diatoms float in water?
Q.
Is Chrysophyta unicellular?
Q. Which of the following organisms are known as chief producers in the oceans?
- Cyanobacteria
- Dinoflagellates
- Euglenoids
- Diatoms
Q. Which one of the following is a characteristic feature of chrysophytes?
- They are parasitic forms which cause disease in animals
- They have a protein rich layer called pellicle
- They have indestructible wall layer deposited with silica
- They are commonly called dianoflagellates
Q. Which among the following is an incorrect statement?
- Diatoms are the chief producers in the oceans
- Diatoms are microscopic and float passively on water
- ‘Diatomaceous earth’ is formed by the cell walls of diatoms
- The walls of diatoms are easily destructible
Q. What is the nature of the cell wall in diatoms? What is diatomaceous earth? Mention any two economic uses of it. Name the group under diatoms belongs in Protista.
Q. Diatomaceous earth is used as heat insulator in boilers and steam pipes because the cell wall of diatom
- Composed of Iron
- Composed of silicon dioxide
- Is bad conductor of electricity
- Is conductor of heat
Q. The phenomenon by which the phage DNA exists as a part of the host DNA is called as
- Lytic cycle
- Episome
- Prophage
- Lysogeny
Q.
12. Three similar sized individuals of a small aquatic plant were collected and placed into each of three petri dishes, X, Y & z, containing different culture solutions.After six weeks the plant in dish X had the same number of leaves as it had previously and they were all small and yellowish. The plant in dish Y had more leaves and they were normal size and much darker green. The plant in dish Z also had more leaves, of normal size but very pale. Which one of the following showswhich elements were missing from the culture solutions?
12. Three similar sized individuals of a small aquatic plant were collected and placed into each of three petri dishes, X, Y & z, containing different culture solutions.After six weeks the plant in dish X had the same number of leaves as it had previously and they were all small and yellowish. The plant in dish Y had more leaves and they were normal size and much darker green. The plant in dish Z also had more leaves, of normal size but very pale. Which one of the following showswhich elements were missing from the culture solutions?
- a
- b
- c
- d
Q. Choose the correct set.
| Column I | Column II | ||
| I. | Gross primary productivity | A. | Total assimilation |
| II. | Secondary productivity | B. | Remains mobile and does not remain in situ |
| III. | Transducers | C. | Green plants |
| IV. | Food web | D. | Interlocking pattern |
- I- A, II- B, III- C, IV- D
- I- A, II- C, Ill- B, IV- D
- I- B, II- C. Ill- D, IV- A
- I- C, II- D, III- A, IV- B
Q.
Where are diatoms found?
Q.
How long do diatoms last in new tanks?
Q. What are the two features of brown algae?
Q. Assertion :The body of Paramecium is covered by a rigid cell wall. Reason: The cell wall is made up of cellulose.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
- Both Assertion and Reason are incorrect
Q. In gram negative bacteria, the glycocalyx is present between the peptidoglycan and LPS layer or at the outermost portion of cell, I. e. After the LPS layer?
Q. Choose the correct answers from the alternatives given.
Cells of many protistans, plants, and fungi, but nor animals, commonly have:
Cells of many protistans, plants, and fungi, but nor animals, commonly have:
- cell wall
- ribosomes
- plasma membrane
- mitochondria
Q. The diatomaceous earth is used to insulate boilers and steam pipes because
- The diatomaceous earth is cheap.
- The wall of diatoms is deposited with calcium.
- It is a good conductor of heat.
- The wall of diatoms is made of silica.
Q. Diatoms float in water due to
- Stored fats
- Gas vacuoles
- Flagella
- Air chambers
