Self-pollination means
Which of the following elements is a constituent of biotin?
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Solution
Biotin, also known as vitamin H, is a water-soluble B-vitamin. It is a coenzyme for carboxylase enzymes, involved in the synthesis of fatty acids, isoleucine, valine and in gluconeogenesis. Sulphur is a constituent of biotin.
Match Column I with Column II
| Column I | Column II |
|---|---|
| A.Limbless reptiles | (1)Elephant |
| B.Jawless vertebrates | (2)Lamprey |
| C.Flightless bird | (3)Ichthiophis |
| D.Largest | (4)Ostrich terrestrial animal |
| E.Blind worm | (5)Cobra |
| (6)Penguin |
Trypsinogen is produced by –
Rennet is purified by C. Hansen (1874) for commercial use.This enzyme is extracted from
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Solution
Rennet is purified enzyme obtained from stomach of calf used in cheese making.
Inter generic crosses are rarely successful through usual breeding techniques. Which of the following may be used to achieve success in this regard?
An important criterion for modern day classification is
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Solution
Modern day classification is new systematics or biosystematics which includes all the characteristics of organisms gathered from the study of different sections like physiology, ecology, anatomy,biochemistry, cytology.
Identify the correct match for tiger reserve and its state –
At resting stage nerve cells has –
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Solution
Resting stage nerve cells has high K+ inside and high Na+ outside.
The taxa believed likely to join the endangered category in near future is called:
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Solution
Vulnerable species are threatened species which are likely to join the category of endangered.
Questions contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 : Forceful expiration occurs through expiratory muscles.
Statement 2 : Expiratory muscles expires quickly.
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Solution
In forceful expiration requiring effort, a different group of inter costal and some abdominal muscles contract to reduce the volume of thorax more than that in ordinary respiration. So, a larger volume of air is breathed out, such muscles are called expiratory muscles.
The curve given below shows enzymaticactivity with relation to three conditions (pH,temperature and substrate concentration.) What do the two axis (x and y) represent ?
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Solution
In the given curve the temperature and enzyme activity relation is shown.
Where will you look for the sporozoites of the malarial parasite?
Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
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Solution
Aschelminthes is bilaterally symmetrical and triploblastic. These are mostly aquatic,free living orparasitic.Their body is three layered which is ectoderm,mesoderm and endoderm
What structures A and B respectively indicate in the life cycle of bryophytes, pteridophytes and gymnosperms?
Which of the following is a richly vascular layer with lots of blood capillaries ?
Choose the correct one
(1)Growth cannot be taken as a defining property of living organism.
(2)Dead organism does not grow.
(3)Reproduction cannot be an all inclusive defining characteristic of living organisms.
(4)No nonliving object is capable of replicating itself.
(5)Metabolism in a test tubeis nonliving.
(6)Metabolism is a defining feature of all living organisms.
Match Column – I with Column – II
| Column I | Column II |
|---|---|
| A.Fibrinogen | 1.Defence mechanism |
| B.Globulins | 2.Osmotic balance |
| C.Albumins | 3.Coagulaton of blood |
A high density of elephant population in an area can result in
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Solution
It is competition between individuals of same species.The intraspecific competition may be very severe because all the members of a species have similar requirements of food, habitat, mate, etc and they also have similar adaptations to get their needs.