These questions are based on class 12 biology book chapter 10
1. Few diseases like malaria, dengue, Chikungunya etc are called vector borne diseases. What does the ‘vector’ in ‘vector borne’ mean?
1. Few diseases like malaria, dengue, Chikungunya etc are called vector borne diseases. What does the ‘vector’ in ‘vector borne’ mean?
a. Water
b. Air
c. Transmitting agent
2. BOD (biological oxygen demand) of water is a measure of
a. Amount of mud present in the water
b. Amount of sewage present in the water
c. Amount of bacteria present in the water
d. Amount of organic matter present in the water
3.Integrated pest control management envisages control of pests through
a. Application of pesticides
b. Usage of natural pest control methods
4. Biofertilizers are organisms that enrich the nutrient quality of the soil. The following can be used as bio fertilizers
a. Bacteria
b. Fungi
c. Cyanobacteria
5. Which of the following are Nitrogen fixing bacteria
a. Rhizobium (symbiotic relationship)
b. Azospirillum (free living bacteria)
c. Azotobacter (free living bacteria)
6. Mycorrhiza stands for a symbiotic association b/w
a. Roto+Fungus
b. Root+Bacteria
c. Root+Virus
d. Root+Mould
1.c
ReplyDelete2.d
3.b
4.a,b,c
5.a,b,c?/
6.a.
@apparao: You got everything correctly.
Delete5. a,b,c
little bit of etymology on micorryzha=this is from greek, rizha=root; hopefully mico=fungus (but not sure). This is an example of symbiotic relationship. The other famous symbiotic relationship is b/w nitrogen fixing bacteria and legume plants.