CBSE Questions for Class 10 Biology How Do Organisms Reproduce Quiz 6 - MCQExams.com

• Budding is a type of asexual reproduction which does not involve the fusion of gametes. 
• A new organism develops from an outgrowth or bud due to cell division at one particular site. 
• The bud remains attached to the parent plant and separates after it gets mature and grows into a new individual. Budding is seen in Hydra, yeast.
• Thus, correct answer is option A. 

The reconstruction of an entire animal from a small fragment by reorganizing the existing cells happens during regeneration. The regenerated animal is far smaller than the original one after the completion of the process. It grows to attain the normal size. eg: Hydra.

• Vasectomy is a surgical procedure for male sterilization.
  
• The emergency contraceptive pill needs to be taken within 72 hours after unprotected sex. These pills are also known as morning after pills.
  
• The copper IUD wrapped in thin copper wire that's toxic to sperm is inserted into the uterus of female.It keeps fertilized egg from implanting in the uterus.
  
• Oral pills are contraceptive pills that need to be taken orally.
• A diaphragm is a rubber cap used as a barrier method of contraception by females during sexual intercourse. 
  

• Reproduction is a biological process in which an organism gives rise to young ones. It is a fundamental feature of all known life. Reproduction enables the continuity of the species and produces genetic variations in organisms. 
• Reproduction not only maintains populations of the young and adult persons but also that of older adults.
• Reproduction is a key process that determines the distribution of people of various ages in a population, called age structure.
• So the correct option is D.
  

• In vegetative propagation, any part of the plant, i.e., stem, root, leaf, or even buds are capable to give rise to new plants. 
  
• Vegetative propagation through leaves is the common method of propagation seen in $$Bryophyllum$$. 
• If one keeps a leaf of $$Bryophyllum$$ on damp soil, within a day or two the buds appear on the margin of the leaf. These buds would later form new plants, complete with roots, leaves, and stem.
  

• In the process of binary fission one parent cell divides to produce two equal cells that give rise to two new individuals, e.g., bacteria and Amoeba.
• Hence in Amoeba nucleus in the parent cell is duplicated before it divides and forms 2 separate individuals so that both can get complete genetic material.

• In flowering plants, the unisexual male flower is staminate, i.e., bearing stamens, while the female flower is pistillate i.e., bearing pistils. 
• Species with both male flowers and female flowers on the same plant are monoecious, while species in which the male flowers are on one plant and the female flowers are on another are dioecious.”
  

•  Family planning allows prevention of unwanted pregnancies and thus, control population.
• There are temporary and permanent methods of preventing unwanted pregnancy.
• Temporary birth control includes the use of condoms, diaphragms, insertion of an intrauterine device (IUD) like a copper-T, taking contraception pills (hormonal contraception). 
• Permanent methods involve vasectomy or tubectomy.

Hence, the correct answer is option D. 

$$\textbf{Correct option: A}$$

$$\textbf{Solution:}$$

Statement A:

$$\bullet$$ Reproduction is a biological process in which a new progeny is produced by an individual at a certain age and the progeny obtained will have more or less similar features to that of parents.

Statement B:

$$\bullet$$ When there is only a single parent involved in the process of reproduction, it is called asexual reproduction. For example, binary fission, fragmentation, budding, etc.

$$\bullet$$ The progenies obtained by asexual reproduction are almost similar to each other as well as to their parents. Such progeny are known as clones.

$$\bullet$$ However, when there are two parents of opposite sexes are involved, that reproduction is called sexual reproduction.

$$\bullet$$ The progenies obtained by sexual reproduction are different in traits at different levels as compared to that of their parents.

Statement C:

$$\bullet$$ Budding and fragmentation are types of asexual reproduction as there is only a single parent involved in the reproduction.

$$\bullet$$ In budding, a protuberance is grown from the parent body called a bud. This bud grows and matures on the parent body and gets detached to form a new organism when falls on an appropriate substrate.

$$\bullet$$ Fragmentation is the process in which the parent body gets broken into many fragments and each fragment grows and develops to form a new organism.

Statement D:

$$\bullet$$ Reproduction is the characteristic feature of living organisms and it does not occur in non-living things.

Thus, all of the given statements are correct.

Hence the correct option is option A.