Recent questions tagged zoology

Joy loves to play football and was selected as a captain of the school team for the district level tournament. He also does social work . He attended blood donation camp to donate blood and he came to know that he was HIV positive. He lost interest in games and refused to play or study. He started counting his days. He remained absent from the school for a long time. The Biology teacher visited his house and counseled him. Joy was back to school and played the tournament also.a.What sense of responsibility did the teacher exhibit?b.A person detected to be HIV positive should be isolated in the society. Do you agree? Why or why not?c.How is AIDS not spread?

asked Dec 2, 2016 by meena.p

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With the help of a diagram, represent the energy flow through different trophic level.

asked Dec 2, 2016 by meena.p

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How does the shape of the pyramid reflect the growth status of a population?

asked Dec 2, 2016 by meena.p

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What are cannabinoids? From which plant are cannabinoids obtained? Which part of the body is affected by consuming these substances?

asked Nov 30, 2016 by meena.p

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Give six points of difference between DNA and RNA in their structural chemistry and their function.

asked Nov 30, 2016 by meena.p

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A woman with blood group “O” marries a man with “AB” blood group a)Work out all the possible phenotypes and genotypes of progeny. b)Discuss the kind of dominance in parents and progeny in their case.

asked Nov 30, 2016 by meena.p

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Differentiate between tubectomy and vasectomy.Mention the techniques that are employed in the following cases: a)Transfer of ovum collected from a donor into the fallopian tube of another female who cannot produce ova but can provide suitable environment for fertilization and development. b) Embryo is formed in the laboratory in which sperm is directly injected into the ovum. c)Semen collected either from husband or healthy donor is artificially introduced either into the ****** or uterus.

asked Nov 30, 2016 by meena.p

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“Lichens are considered good examples of obligate mutualism”. Comment.

asked Nov 30, 2016 by meena.p

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What are statins? Where are they formed from?

asked Nov 30, 2016 by meena.p

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Differentiate between two types of tumours.

asked Nov 30, 2016 by meena.p

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Give two reasons why both the strands of DNA are not copied during DNA replication.

asked Nov 30, 2016 by meena.p

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Draw the structure of the microsporangium with a neatly labeled diagram.

asked Nov 30, 2016 by meena.p

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Name the phenomenon that occurs when homologus chromosomes do not separate during meiosis.

asked Nov 30, 2016 by meena.p

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Regarding the figure : 1. It shows asexual reproduction in sponge 2. Reproductive structures are gemmules. 3. The most common of asexual reproductive structures (in living world) is zoospores which are usually microscopic and non-motile.

asked Apr 4, 2014 by pady_1

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Choose the odd one out : (on the basis of oestrous and menstrual cycle)

asked Apr 4, 2014 by pady_1

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Parthenogenesis occurs in all except :

asked Apr 4, 2014 by pady_1

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Regarding asexual reproductive structures : Match the following & choose the most appropriate option:

asked Apr 4, 2014 by pady_1

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Asexual reproduction : 1. Cell division is itself a mode of reproduction in Protists and Monerans. 2. Many single-celled organisms reproduce by binary fission, where a cell divides into two halves and each rapidly grows into an adult (e.g., Amoeba, Paramecium). 3. In yeast, the division is unequal and small buds are produced that remain attached initially to the parent cell which, eventually gets separated and mature into new yeast organisms. Regarding 1, 2 and 3 :

asked Apr 4, 2014 by pady_1

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The second maturation division of the mammalian ovum occurs

asked Apr 4, 2014 by pady_1

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The testes in humans are situated outside the abdominal cavity inside a pouch called *******. The purpose served is for

asked Apr 4, 2014 by pady_1

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Which of the following is a mode of reproduction in animals in which embryos develop inside eggs that are retained within the mother's body until they are ready to hatch?

asked Apr 4, 2014 by pady_1

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Bartholin glands or greater vestibular glands in adult females is homologous to what in adult males?

asked Apr 4, 2014 by pady_1

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The primitive gut that forms during which stage in the developing embryo is known as the archenteron?

asked Apr 4, 2014 by pady_1

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Where in the human body are the Sertoli cells located?

asked Apr 4, 2014 by pady_1

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Which one of the following statements about human sperm is correct?

asked Apr 4, 2014 by pady_1

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Which of the following is incorrect? (1) Human embryos have two pairs of ducts to let gametes out of the body, (2) Wolffian ducts develops in males into the epididymis and vas deferens, (3) Müllerian ducts develops in females into the Fallopian tubes, uterus and ******

asked Apr 4, 2014 by pady_1

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Where are the Bartholin's glands situated ?

asked Apr 4, 2014 by pady_1

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Which of the following hormones is not a secretion product of human placenta ?

asked Apr 4, 2014 by pady_1

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Ovulation in the human female normally takes place midway during the menstrual cycle in which of the following phases?

asked Apr 4, 2014 by pady_1

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Wings of cockroach arise from

asked Apr 4, 2014 by pady_1

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Male cockroach can be identified from the female by the presence of

asked Apr 4, 2014 by pady_1

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Dorsal plate of cockroach is called

asked Apr 4, 2014 by pady_1

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Wrinkling in old age is due to

asked Apr 4, 2014 by pady_1

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Mast cells secrete

asked Apr 4, 2014 by pady_1

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Which of the following cell types in the connective tissue produces antibodies?

asked Apr 4, 2014 by pady_1

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Ground substances and fibres in the connective tissue are the secretory products of

asked Apr 4, 2014 by pady_1

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Large, irregular,ovoid cells present in areolar tissue are

asked Apr 4, 2014 by pady_1

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Which type of the tissue forms the framework of the external ear?

asked Apr 4, 2014 by pady_1

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Which of the following tissue has matrix which is the source of its structural and functional performance?

asked Apr 4, 2014 by pady_1

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Peritoneum covers

asked Apr 4, 2014 by pady_1

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Mammals lack mucous glands in their skin because

asked Apr 4, 2014 by pady_1

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Horns of mammals are mostly composed of

asked Apr 4, 2014 by pady_1

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An epithelial lining which is , one cell thick with large cells which are taller than wide, but all cells are not of the same height but of variable heights. This lining is of

asked Apr 4, 2014 by pady_1

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Which of the following layers of stomach are best described as being composed primarily of epithelial tissue ?

asked Apr 4, 2014 by pady_1

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How many segments form the head capsule of the cockroach?

asked Apr 4, 2014 by pady_1

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Cockroach is an insect because it has

asked Apr 4, 2014 by pady_1

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To which order does Periplanata Americana belong?

asked Apr 4, 2014 by pady_1

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Ciliated epithelium is found on

asked Apr 4, 2014 by pady_1

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The epithelium best adapted for a body surface subject to abrasion is

asked Apr 4, 2014 by pady_1

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