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प्रश्न
Why only left ovary and oviduct arc present in birds?
उत्तर १
Only left ovary and oviduct are present in birds to reduce body weight and is an adaptation for flying.
उत्तर २
Only left ovary and oviduct are present in birds to reduce body weight and is an adaptation for flying.
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संबंधित प्रश्न
According to Abiogenesis, life originated from
(1) Non-living matter
(2) Pre-existing life
(3) Oxygen
(4) Extra-terrestrial matter
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Ecological isolation | a. | Sexually mature at different times of the year |
| ii. | Ethological isolation | b. | Specific mating behaviours |
| iii. | Mechanical isolation | c. | Difference in structure of mating organs |
| iv. | Seasonal isolation | d. | Same geographic region but separate habitat |
Which of the following is TRUE for genetic drift?
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Zygote mortality | a. | Hybrid develops to maturity but becomes sterile |
| ii. | Hybrid sterility | b. | Egg is fertilized but zygote dies |
| iii. | Gamete mortality | c. | Union of two gametes does not occur in the iven time |
Which is TRUE for industrial melanism?
Sewall Wright effect is ______
Ethological isolation is due to differences in ______
Mention the name of a sterile animal produced by intergeneric hybridisation.
What is Genetic recombination?
What is reproductive isolation?
