Biology - Online Test
Q1. Who divided animals into two group based on the presence and absence of red blood cells?
Answer : Option D
Explaination / Solution:
Aristotle used simple morphological characters to classify plants into trees, shrubs and herbs. He also divided animals into two groups, those which had red blood and those that did not.
Q2.
Match the following :
| Hormone | Nature |
| a) Parathormone | i) Polypeptide |
| b) Oxytocin | ii) Amino acid Derivative |
| c) Sex hormone | iii) Peptide |
| d) Norepinephrine | iv) Steroid |
Answer : Option C
Explaination / Solution:
Parathormoneis a polypeptide hormone. Oxytocin is peptide hormone. Sex hormone is a steroid hormone and Norepinephrine is a amino acid derivative.
Q3. Interactions between different species living within a particular area may be:
Answer : Option B
Explaination / Solution:
Interactions between different species living within a particular area may be useful as in case of mutualism, fatal as in case of parasitism or neutral in which no one is harmed.
Q4. The cupric ions are essential for
Answer : Option C
Explaination / Solution:
Copper is absorbed as cupric ions (Cu2+).
It activates some enzymes in plants which are involved in lignin synthesis and it is essential in several enzyme systems. It is also required in the process of photosynthesis, is essential in plant respiration and assists in plant metabolism of carbohydrates and proteins.
Q5. _____ from pharynx is conveyed into oesophagus by _____ .
Answer : Option A
Explaination / Solution:
The bolus is then conveyed into the pharynx and then into the oesophagus by swallowing or deglutition.
Q6. Goitre can occur as a consequence of all the following except
Answer : Option B
Explaination / Solution:
Goitre is a deficiency disease that occurs due to less secretion of hormone thyroxin. Less or no secretion of this hormone may occurs due to iodine deficiency, pituitary adenoma and Grave’s disease.
Q7. Complete the following hierarchical chart showing parts of nervous system :
Answer : Option B
Explaination / Solution:
Human nervous system consists of central nervous system and peripheral nervous system. Peripheral nervous system includes 12 pairs of cranial nerves emerging from brain and 31 pairs of spinal nerves arising from spinal nerve.
Q8. The cell wall of green algae is made up of
Answer : Option C
Explaination / Solution:
Green algae usually have a rigid cell wall made of an inner layer of cellulose and an outer layer of pectose.
Q9. The most recent and accepted model of plasma membrane is
Answer : Option A
Explaination / Solution:
Fluid-Mosaic model is the most recent and accepted model of plasma membrane. This model was proposed by Singer and Nicolson in 1972. The quasi-fluid nature of lipid enables lateral movement of proteins with in the overall bilayer.
Q10. The term gene was coined by
Answer : Option D
Explaination / Solution:
The term gene was coined by Johannsen in 1909. He defined gene to be elementary unit of inheritance that specifies the expression of a particular trait.
