CBSE 11TH BIOLOGY - Online Test
Q1. Who first saw and described a live cell?
Answer : Option B
Explaination / Solution:
The first man to witness a live cell under a microscope was Anton van Leeuwenhoek, who in 1674 described the algae Spirogyra. Van Leeuwenhoek probably also saw bacteria.
Q2. The essential role of air in the growth of green plants is given by
Answer : Option A
Explaination / Solution:
Joseph Priestley (1733-1804) in 1770 performed a series of experiments that revealed the essential role of air in the growth of green plants.
Q3. Vital capacity of our lungs include all of the following except :
Answer : Option C
Explaination / Solution:
Vital capacity includes ERV, TV and IRV or the maximum volume of air a person can breathe out after a forced inspiration.
Q4. Choose the odd one out based on coelom: Annelids, Molluscs, Platyhelminthes, Arthopods
Answer : Option B
Explaination / Solution:
Animals possessing coelom are called coelomates such as annelids, molluscs, arthropods, echinoderms, hemichordates and chordates.In Platyhelmites coelom is absent.
Q5. Monoterpene esters called pyrethoids found in flowers and leaves of chrysnthemumare used commercially for making
Answer : Option A
Explaination / Solution:
Monoterpene eaters called pyrethoids found in flowers and leaves of chrysnthemumare used commercially for making insecticides.
Q6. The pre-hypertension blood pressure value is a measurement between :
Answer : Option A
Explaination / Solution:
Hypertension or high blood pressure is the condition where blood pressure increases substantially. The pre-hypertension blood pressure value is between 120/80 and 139/89.
Q7. In plants, the gaseous exchange take place in a) Stomata b) Roots c) Stems d) Lenticles
Answer : Option B
Explaination / Solution:
Plants unlike animals have no special systems for breathing or gaseous exchange. Stomata and lenticels allow gaseous exchange by diffusion.
Q8. The root is covered at the apex by a thimble-like structure called
Answer : Option A
Explaination / Solution:
The root is covered at the apex by a thimble-like structure called the root cap.
Q9. What is the average cell cycle span for a mammalian cell?
Answer : Option D
Explaination / Solution:
All the phases of cell cycle in mammalian cell are completed in 24 hours.
Q10. A renal corpuscle is :
Answer : Option C
Explaination / Solution:
Renal corpuscle, also called malpighian body, filtration unit of vertebrate nephrons, functional units of the kidney. It consists of a knot of capillaries (glomerulus) surrounded by a double-walled capsule (Bowman's capsule) that opens into a tubule.
