Class 12 Biology - Chapter Evolution NCERT Solutions | Find out through internet and popular sc
Find out through internet and popular science articles whether animals other than man have self-consciousness.
There are many animals other than humans, which have self consciousness. An example of an animal being self conscious is dolphins. They are highly intelligent. They have a sense of self and they also recognize others among themselves and others. They communicate with each other by whistles, tail-slapping, and other body movements. Not only dolphins, there are certain other animals such as crow, parrot, chimpanzee, gorilla, orangutan, etc., which exhibit self-consciousness.
More Questions From Class 12 Biology - Chapter Evolution
- Q:- Describe one example of adaptive radiation.
- Q:- Explain antibiotic resistance observed in bacteria in light of Darwinian selection theory.
- Q:- Can we call human evolution as adaptive radiation?
- Q:- Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)
- Q:-
Practise drawing various animals and plants.
- Q:- Using various resources such as your school library or the internet and discussions with your teacher, trace the evolutionary stages of any one animal say horse.
- Q:- Attempt giving a clear definition of the term species
- Q:- List 10 modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.
- Q:- Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
Popular Questions of Class 12 Biology
- Q:- Why is reproduction essential for organisms? Answer
- 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:- 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:- Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?
- Q:- Microbes can be used to decrease the use of chemical fertilisers and pesticides. Explain how this can be accomplished.
- Q:- List the attributes that populations but not individuals possess.
- Q:- What are sacred groves? What is their role in conservation?
- Q:- What are chasmogamous flowers? Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
- Q:- Is sex education necessary in schools? Why?
- Q:- If a marine fish is placed in a fresh water aquarium, will the fish be able to survive? Why or why not?
- Q:- Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?
- Q:- Discuss with your teacher what does a suitable gene means, in the context of DNA vaccines.
- Q:- How many eggs are released by a human ovary in a month?
How many eggs do you think would have been released if the mother gave birth to identical twins?
Would your answer change if the twins born were fraternal?
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