CBSE Questions for Class 12 Medical Biology Strategies For Enhancement In Food Production Quiz 12 - MCQExams.com

• Superovulation, also known as controlled ovarian hyperstimulation, is the process of inducing a female to release more than one egg in a month by injecting hormones.
• Artificial insemination is the technique in which semen with living sperms is collected from the male and introduced into the female reproductive tract at the proper time with the help of instruments.
• After artificial insemination, 4 to 10 embryos are collected at a time. Then each embryo is transplanted into a surrogate mother “carrier cow”. All the methods have been used for increasing the productivity of the super milch cows. 
• Therefore, the correct answer is option D.

• According to 2011 FAO report, India produces more than 50000 tons of milk. 
• It ranks fifth in the world in its population of cattle and buffaloes but it is lowest in milk yield per cow that is about 1000 liters per year. 
• The global average for milk production is approximately 2,200 liters per cow.

• Cryopreservation is a process where cells, whole tissues, or any other substances susceptible to damage caused by chemical reactivity or time are preserved by cooling to ( $$−196°C$$ )  temperature. 
• This technique is used for the preservation of various tissues, preservation of semen of good quality bull and also preservation of very young foetuses. 

$$\textbf{Correct answer: C}$$  

$$\textbf{Option (A):}$$  

$$\bullet$$ The exchange of germplasm takes place in the shoots not because it is economic. 

$$\textbf{Option (B):}$$  

$$\bullet$$ The exchange of germplasm through the shoots is not because it is small and handy. 

$$\textbf{Option (C):}$$  

$$\bullet$$ The shoot tips are chosen as the part of the plant for the exchange of germplasm because it does not contain any viruses. So the chance of it affecting the other plant is lower. 

$$\bullet$$ It also contains the most meristematic tissues which ensure faster growth. 

$$\textbf{Option (D):}$$  

$$\bullet$$ The plant cells are totipotent, which means they have the ability to produce complete structures from a single cell.

$$\bullet$$ This character is observed in all parts of plants making them genetically stable. So, there is no speciality for the shoot tips due to this character. 

Hence, the correct answer is option (C).

• Poultry farming is the method of rearing and maintaining poultry birds.
•  In a poultry farm, there are two types of birds called broilers and layers.
• Layers are the egg-laying birds with low meat content. 
• Broilers are the birds reared for the meat. 
• For the development of chicken, layers incubate their eggs at a specific temperature. 
• The recommended temperature is 102 $$^o$$ Fahrenheit (38.9 $$^o$$ C).