CBSE 11TH BIOLOGY - Online Test
Q1. Animals that has become extinct in India is
Answer : Option B
Explaination / Solution:
The animals that were present earlier but now not available are called extinct animals. In India a number of animals have become extinctsuch as Cheetah.
Q2.
Match the following :
vertebra
a) Cervical
b) Coccyx
c) Thoracic
d) Lumbar
No.of bones feature
i) 5
ii) 4
iii)12
iv) 7
Answer : Option A
Explaination / Solution:
Vertebral column in general. The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).
Q3. In which type of solution, the living cell is placed in figure given below
Answer : Option D
Explaination / Solution:
If the external solution is more concentrated, it is hypertonic. Cells shrink in hypertonic.
Q4. Antibodies are formed by
Answer : Option D
Explaination / Solution:
Antibodies are formed against any foreign body entering the body. It is formed by plasma cell, globulins that develop resistance against particular type of disease.
Q5. Which among the following is not included in the three domains system?
Answer : Option A
Explaination / Solution:
The three domain system includes Archaebacteria, Eubacteria and Bacteria domain.
Q6. Mineral absorption into the plant is always against the concentration gradient and use ATP as source of energy, it is an/ a
Answer : Option D
Explaination / Solution:
Mineral absorption into the plant is always against the concentration gradient and use ATP molecules as source of energy is an active process. As concentration of minerals are always higher in cell than soil.
Q7. Which layer of alimentary canal forms crypts in between the base of villi?
Answer : Option C
Explaination / Solution:
Mucosa forms gastric glands in the stomach and crypts in between the bases of villi in the intestine (crypts of Lieberkuhn).
Q8. The space within cochlea called scala media is filled with
Answer : Option B
Explaination / Solution:
Cochlear duct or scala media has endolymph and high potassium ion concentration that the stereocilia of the hair cells protrude into helicotrema.
Q9. A moss plant used as a fuel are
Answer : Option A
Explaination / Solution:
Species of Sphagnum, a moss, provide peat that have long been used as fuel.
Q10. The nucleus was first described by
Answer : Option B
Explaination / Solution:
Nucleus as a cell organelle was first described by Robert Brown as early as 1831.
