Question

3. Which of the following is a biological nitrogen fixer?
(a) housefly o(
(b)fungi
(c) Rhizobium
4. Edward Jenner discovered the vaccine for
(a) cholera
(b) smallpox ♡ (c) tuberculosis
5. Chlamydomonas belongs to a group called
(a) bacteria
(b) viruses
O (c) algae
0 (d) polio
0 (d) fungi​

Answer 1

Answer:

Rhizobium is a biological nitrogen fixer.

Edward Jenner discovered the vaccine for small pox.

Chamydomonas belongs to the group called algae.

Answer 2

Answer:

3. (c) Rhizobium is a biological nitrogen fixer

4. Edward Jenner discovered the vaccine for (b) smallpox

5. Chlamydomonas belongs to a group called (c) algae

Explanation:

Rhizobium bacteria grow in a symbiotic relationship with the root nodules of leguminous plants like peas.

• Nitrogen-fixing cannot be accomplished on its own. As a result, rhizobium necessitates the presence of a host plant.
• Dinitrogen is converted to ammonia by them. Soil productivity and fertility are improved through nitrogen-fixing.
• Rhizobium leguminosarum, Rhizobium lantis, and others are examples.

Edward Jenner is well-known around the world for his groundbreaking contribution to the smallpox vaccine and eventual eradication.

Chlamydomonas is a genus of single-celled green algae with biflagellated cells that can be found in soil, ponds, and ditches.

• Chlamydomonas is capable of producing its food through a process known as photosynthesis.
• Light-sensitive pigments of this organism assist it in moving to locations where light is plentiful.