Recent questions tagged zoology

In the given flow diagram, the replication of retrovirus is shown in a host. Examine it.a) Why is this virus called a retrovirus?b) Fill in (1) and (2) c) Can infected cells survive while viruses are being replicated and released by the host cell?

asked Dec 28, 2016 by meena.p

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Study the given figures (a) and (b) given below and answer the questions from the graph Under the influence of which type of natural selection would graph (a) become like graph (b)?b. What would be the likely reasons for new variations to arise in the population? c. Who suggested natural selection as a mechanism for evolution?

asked Dec 28, 2016 by meena.p

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A man with a blood group A married a woman with blood group B. They have a son with blood group AB and a daughter with blood group O. Work out the possibility of inheritance with the help of a Punnet square.

asked Dec 27, 2016 by meena.p

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Give another term for STD. Name two sexually transmitted diseases that are curable and two diseases that are not curable.

asked Dec 27, 2016 by meena.p

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Why are coral reefs not found in the regions of West Bengal to Andhra Pradesh but are found in Tamil nadu and on the east coast of India?

asked Dec 27, 2016 by meena.p

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How does Monascus help in controlling blood cholesterol?

asked Dec 27, 2016 by meena.p

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How is the child affected if it is grown from the zygote formed by an XX egg fertilized by a Y carrying sperm? What do you call this abnormality?

asked Dec 27, 2016 by meena.p

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How does Cu-T act as a contraceptive?Give the function of corpus luteum and endometrium.

asked Dec 27, 2016 by meena.p

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What is snow blindness?

asked Dec 27, 2016 by meena.p

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Name the pests the lady bird and dragon flies help to get rid off respectively.

asked Dec 27, 2016 by meena.p

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Name any two vestigial organs found in man.

asked Dec 27, 2016 by meena.p

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What is noise pollution? Discuss the source and effects of noise pollution. How can noise pollution be controlled? or Give an account of hydrarch succession.

asked Dec 27, 2016 by meena.p

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Provide experimental evidence for semi conservative mode of replication. Meselson and Stahl in 1957 gave experimental evidences that each DNA strand served as a template for new synthesis, a process called semi conservative replication.

asked Dec 27, 2016 by meena.p

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Mrs Kavitha was eager to know the * of the foetus that her daughter-in-law was carrying. She was so anxious that she was ready to pay any amount for it. The doctor refused to disclose the test result. a.What is the value exhibited by the doctor? b. How can we know the * of the foetus? How is it done? c. Why is disclosing the *** of the foetus banned in our country?

asked Dec 27, 2016 by meena.p

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Represent schematically phosphorus cycle in an ecosystem.

asked Dec 27, 2016 by meena.p

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Explain the responsibility of GEAC set up the Government of India.

asked Dec 27, 2016 by meena.p

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What is apiculture? What are the requirements to consider bee keeping?

asked Dec 27, 2016 by meena.p

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Differentiate between communicable and non communicable diseases? Name the body part and the host in which the following events take place in the life cycle of Plasmodium

asked Dec 27, 2016 by meena.p

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Classify the following as examples of homology or analogy.

asked Dec 27, 2016 by meena.p

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Why are grasshopper and Drosophila said to show male heterogamety? Explain female heterogamety with an example.

asked Dec 27, 2016 by meena.p

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The events of a menstrual cycle are represented below. Answer the following:a) State the levels of FSH,LH and progesterone simply by mentioning high or low around 13th or 14th day and 21st and 23rd day. b) In which of the above phase does egg travel to the fallopian tube? c)Why is there no menstruation after fertilization? or Distinguish between gametogenesis and embryogenesis.

asked Dec 26, 2016 by meena.p

2 answers

What is artificial insemination? What are the advantages of this technique?

asked Dec 26, 2016 by meena.p

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Would you consider wings of butterfly and bat homologus or analogus? Why?The process of termination during transcription in a prokaryotic cell is being represented here. Name the labeled parts a,b,c and d.

asked Dec 26, 2016 by meena.p

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What is the number of chromosomes in the following cells? Primary oocyte, Secondary oocyte, Ootid and follicle.

asked Dec 26, 2016 by meena.p

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What type of interaction is shown by sparrows eating the seeds?

asked Dec 26, 2016 by meena.p

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Name the first transgenic cow.

asked Dec 26, 2016 by meena.p

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What is a gene pool?

asked Dec 26, 2016 by meena.p

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Name the phenomenon by which rapid speciation takes place.

asked Dec 26, 2016 by meena.p

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What are the causes of water pollution? How can water pollution be controlled? Explain the various attributes of population

asked Dec 23, 2016 by meena.p

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What does Hardy-Weinberg’s principle state? What are the factors that affect Hardy Weinberg’s equilibrium?Discuss the characteristics of a genetic code.

asked Dec 23, 2016 by meena.p

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Explain female human reproductive system with the help of a neat labeled diagram.What is meant by population explosion? What are the measures to control over population?

asked Dec 23, 2016 by meena.p

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Anitha was very happy when she gave birth to her first child. Her in laws were dissatisfied at her for not giving birth to a male child and blamed Anitha. Anitha tried to convince her in laws that she had no role in the child’s gender. They understood the biological reason, yet were not satisfied. Anitha’s husband took up the matter and convinced his parents. a. What values did Anitha’s husband show in the above situation? b.What governs *** determination in humans? How is it different from birds? c.Why cannot Anitha be blamed for not giving birth to a male child?

asked Dec 23, 2016 by meena.p

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What is meant by ozone shield? Name two ozone depleting substances. How do ozone depleting substances affect ozone shield?

asked Dec 23, 2016 by meena.p

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How are DNA fragments separated and isolated for DNA finger printing? Explain

asked Dec 23, 2016 by meena.p

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Draw a schematic sketch of pBR 322 plasmid and label the following in it a)Any 2 restriction sites b) Ori and rop genes c) An antibiotic resistant gene.

asked Dec 23, 2016 by meena.p

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State the measures you would undertake to improve the quality and quantity of milk production?

asked Dec 23, 2016 by meena.p

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What are carcinogens? What are the different types of carcinogens? Also mention different methods of cancer treatment.

asked Dec 23, 2016 by meena.p

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Point out three similarities in the behavior of chromosomes and genes.

asked Dec 23, 2016 by meena.p

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What do the pictures ‘a’ and ‘b’ illustrate with reference to evolution? Explain.

asked Dec 23, 2016 by meena.p

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Give any three difference between sexual and asexual reproduction.

asked Dec 23, 2016 by meena.p

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Differentiate between primary productivity and secondary productivity.

asked Dec 21, 2016 by meena.p

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Why has natural selection not eliminated sickle cell anemia?

asked Dec 21, 2016 by meena.p

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What does GIFT represent? Bryophytes and pteridophytes produce a large number of male gametes but relatively a few female gametes. Why?

asked Dec 21, 2016 by meena.p

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Define polar vortex.

asked Dec 21, 2016 by meena.p

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What is the medicinal use of cyclosporine A?

asked Dec 21, 2016 by meena.p

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Which period is known as “Age of Amphibians”?

asked Dec 21, 2016 by meena.p

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Name the three nonsense codons.

asked Dec 21, 2016 by meena.p

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What is an operon? Explain. or Define bacterial transformation. Who demonstrated experimentally and how?

asked Dec 21, 2016 by meena.p

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With the help of a neat labeled diagram , describe the reproductive system of human male. or Describe various natural methods of birth control

asked Dec 21, 2016 by meena.p

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Rita and her parents were watching a TV serial in the evening. During a commercial break, an advertisement flashed on the screen that was promoting use of sanitary napkins. Rita was still watching the TV. The parents got embarrassed and changed the channel. Rita objected to her parents behavior and explained the need of these advertisements. a.What values did parents show? b.Briefly describe the phases of menstrual cycle c. Do you think such advertisements should be avoided or banned? Why?

asked Dec 21, 2016 by meena.p

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