Class 12 Biology - Chapter Reproduction in Organisms NCERT Solutions | Higher organisms have resorted to sexual
Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?
Although sexual reproduction involves more time and energy, higher organisms have resorted to sexual reproduction in spite of its complexity. This is because this mode of reproduction helps introduce new variations in progenies through the combination of the DNA from two (usually) different individuals. These variations allow the individual to cope with various environmental conditions and thus, make the organism better suited for the environment. Variations also lead to the evolution of better organisms and therefore, provide better chances of survival. On the other hand, asexual reproduction does not provide genetic differences in the individuals produced.
More Questions From Class 12 Biology - Chapter Reproduction in Organasim
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Differentiate between a zoospore and a zygote.
- Q:- Define
(a) Juvenile phase
(b) Reproductive phase
(c) Senescent phase. - Q:- Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?
- Q:- Why is the offspring formed by asexual reproduction referred to as clone?
- Q:- Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?
- Q:- Differentiate between gametogenesis from embryogenesis.
- Q:- Distinguish between asexual and sexual reproduction. Why is vegetative reproduction also considered as a type of asexual reproduction?
- Q:-
Define external fertilization. Mention its disadvantages.
- Q:- What is vegetative propagation? Give two suitable examples.
Popular Questions of Class 12 Biology
- Q:- Name the parts of an angiosperm flower in which development of male and female gametophyte take place.
- Q:-
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________. - Q:- What do you think is the significance of reproductive health in a society?
- Q:- Mention the advantages of selecting pea plant for experiment by Mendel.
- Q:- Group the following as nitrogenous bases and nucleosides:
Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine. - Q:- Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
- Q:- What are the various public health measures, which you would suggest as safeguard against infectious diseases?
- Q:- Explain in brief the role of animal husbandry in human welfare.
- Q:- Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why?
- Q:- Can you list 10 recombinant proteins which are used in medical practice? Find out where they are used as therapeutics (use the internet).
Recently Viewed Questions of Class 12 Biology
- Q:- Depending upon the chemical nature of the template (DNA or RNA) and the nature of nucleic acids synthesised from it (DNA or RNA), list the types of nucleic acid polymerases.
- Q:- In which way have microbes played a major role in controlling diseases caused by harmful bacteria?
- Q:- Find out the name of the microbes from which Cyclosporin A (an immunosuppressive drug) and Statins (blood cholesterol lowering agents) are obtained.
- Q:- What measure would you take to prevent water-borne diseases?
- Q:- Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?
- Q:- Why is that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.
- Q:- The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its full form:
(a) MALT
(b) CMI
(c) AIDS
(d) NACO
(e) HIV - Q:- Explain what is meant by metastasis.
- Q:- What is the ecological principle behind the biological control method of managing with pest insects?
- Q:-
With the help of suitable diagram describe the logistic population growth curve.
10 Comment(s) on this Question
Its very simple Good for board class
This site is good for lerning questions and answers
It is very helpful for me, thnks
I clear my NEET through it
Thanks is this a ncert statement?
Very helpful thank u
Thanks
Thanks
Thanks
Best site
- All Chapters Of Class 12 Biology
- All Subjects Of Class 12