CBSE 11TH BIOLOGY - Online Test
Q1. Read the following :
i. The synovial joints ischaracterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones.
ii. Saddle is a type of synovial joint
i. The synovial joints ischaracterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones.
ii. Saddle is a type of synovial joint
Answer : Option A
Explaination / Solution:
Synovial joints are characterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones.
A saddle joint is a synovial joint where one of the bones forming the joint is shaped like a saddle with the other bone resting on it like a rider on a horse. Saddle joint (between carpal and metacarpal of thumb)
Q2. The life span of RBC and WBC are respectively
Answer : Option D
Explaination / Solution:
Red blood cells (RBC) live for 120 days and white blood cells (WBC) live for 90 days. Afterwards they are degraded in spleen.
Q3. Which one is important in nutrient recycle and act as decomposer and mineralisers of the biosphere
Answer : Option A
Explaination / Solution:
Fungi is important in nutrient cycle and acts as decomposer along with bacteria and mininerlisers of the biosphere to regular recycling of nutrients in the biosphere.
Q4. Cohesion-tension theory is related to
Answer : Option D
Explaination / Solution:
The process of movement of water and minerals from roots to leaves in plant through xylem tissues is called ascent of sap. The most accepted theory of ascent of sap is cohesion-tension theory.
Q5. Minerals present in the soil are absorbed by
Answer : Option D
Explaination / Solution:
Most of the minerals present in soil can enter plants through roots.
Q6.
In the Enteric nervous system :
i. neurons of Myentric plexus regulates glandular secretions in GI tract.
ii. neurons of Meissner’s plexus regulates peristaltic waves.
Answer : Option D
Explaination / Solution:
The enteric nervous system or ENS or intrinsic nervous system is one of the main nervous system of neuron that governs the functioning of gastrointestinal system.
Q7. Among the following correct matches for ear parts and functions are :
column A
a) cristae
b) cerumen
c) organ of corti
d) maculae
column B
i) responsible for lubrication and protection
ii) responsible for dynamic equilibrium
iii)responsible for static equilibrium
iv) responsible for hearing
column A
a) cristae
b) cerumen
c) organ of corti
d) maculae
column B
i) responsible for lubrication and protection
ii) responsible for dynamic equilibrium
iii)responsible for static equilibrium
iv) responsible for hearing
Answer : Option C
Explaination / Solution:
The cristae present in internal ear is responsible for dynamic equilibrium. Cerumen is responsible for lubrication and protection. Organ of corti is responsible for hearing and maculae is responsible for static equilibrium of thebody.
Q8. Transient poor consists
Answer : Option B
Explaination / Solution:
Transient poverty is cyclical or temporary. The transient poor can move out of poverty once the exogenous shock has passed. It might be related to seasonally; or to losing a job.
Q9. In which pteridophytes, hetersporous is produced?
Answer : Option A
Explaination / Solution:
Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores are known as heterosporous.
Q10. SER differ from RER in
Answer : Option A
Explaination / Solution:
Smooth endoplasmic reticulum (SER) differ from rough endoplasmic reticulum (RER) in absence of ribosome on the surface of endoplasmic reticulum.
