CBSE 11TH BIOLOGY - Online Test
Q1. Egg of reptiles and birds are
Answer : Option A
Explaination / Solution:
The eggs of reptiles and birds are polyecithal because they contain large amount of yolk inside the egg.
Q2. Polysaccharide does not metabolised in human body and used for kidney function is
Answer : Option B
Explaination / Solution:
Inulin is a starchy substance found in a wide variety of fruits, vegetables and other herbs. This polysaccharide is not metabolized in human body and used for kidney function.
Q3. Correct order for increasing number of corpuscles in our blood is :
Answer : Option C
Explaination / Solution:
WBCs are relatively lesser in number which averages 6000-8000 mm–3 of blood. A healthy adult man has, on an average, 5 millions to 5.5 millions of RBCs mm–3 of blood.. Blood normally contains 1,500,00-3,500,00 platelets mm–3.
Q4. Glycolysis is also known as
Answer : Option A
Explaination / Solution:
The scheme of glycolysis was given by Gustav Embden, Otto Meyerhof, and J. Parnas, and is often referred to as the EMP pathway.
Q5. The small lateral outgrowth of the leaf base which protect the young leaf and its axillary buds in young stage is called
Answer : Option B
Explaination / Solution:
The leaf base bear two lateral small leaf like structures called stipules.
Q6. How many chromosomes are present in each cell of onion root tip?
Answer : Option A
Explaination / Solution:
Onion root tip cells have 16 chromosomes in each cell, same as the number of chromosomes in somatic cells.
Q7. The physiological unit of a kidney is :
Answer : Option C
Explaination / Solution:
Nephrons are the physical unit or functional unit of kidney. Millions of nephrons are present in each kidney but physiological unit of kidney is urinigerous tubule.
Q8. The meristems which occur at the tips of roots and shoots and produce primary tissues are called
Answer : Option B
Explaination / Solution:
Apical meristem is found at the apices, or tips of the plant, both the tip of the shoot and the root, and is a region of actively dividing cells. The definition is easy to remember when you break it down. An apex is the tip, the very end, of something.
Q9. The differentiated cells have lost the capacity to divide can regain the capacity of division under certain conditions called as
Answer : Option B
Explaination / Solution:
The living differentiated cells that have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation.
Q10. The scientific name of organisms should be written as
Answer : Option C
Explaination / Solution:
Mangiferaindica. Here, Mangifera is a generic name while indica is a specific name.hence, the correct option is Genus species.
