Tag: reproductive health
Questions Related to reproductive health
Which one of the following groups includes all sexually transmitted disease?
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AIDS, Syphilis, Cholera
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HIV, Malaria, Trichomoniasis
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Gonorrhoea, Hepatitis- B, Chlamydiasis
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Hepatitis-B, Haemophilia, AIDS
All of the diseases like AIDS, Gonorrhoea, hepatitis- B, chlamydiosis, and syphilis are sexually transmitted diseases. While cholera, malaria, hemophilia are water-borne, parasitic and Mendelian disorders respectively.
The symptom of hepatitis B is
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Fatigue
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Brownish urine
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Jaundice
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All of the above
Hepatitis B or HBV can cause yellowing of skin & eyes, jaundice, dark urine, abdominal pain & in severe cases, liver failure.
A farmer introduced garden lizards into his agricultural fields to eradicate insects. This method is
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Environmental ethic method
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Biological control method
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Bio accumulation method
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Bio magnification method
There are different forms of pest control methods for the elimination of the insects and pests. If a farmer introduces the organisms or pests which can act on the other harmful pests, known as the biological control method. This method involves the use of living organisms for the eradication of the insects in the farm which destroy the crops. The lizards feed on the insects and protect the crops.
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Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.
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Both the Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
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The Assertion is true but the Reason is false.
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Both the Assertion and Reason are false.
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The Assertion is false but Reason is true.
Chlamydiosis or Chlamydia infection is the most commonly sexually transmitted disease and affects the human genital organs. This is caused by the bacterium Chlamydia trachomatis. Gonorrhea or gonococcal urethritis, is a sexually transmitted infection found in men and is caused by the bacterium Neisseria gonorrhoeae and this infection do not show much difference from that caused by Chlamydia trachomatis in men.
Which of the following statements is correct for the pollen tube
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It shows chemotactic movement
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It shows only tip growth
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It is composed of three non-cellular zones
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It shows radial cytoplasmic streaming
The movement of pollen tube towards embryosac though style is chemotactic as it secrets pectinases and other hydrolytic enzymes to create a passage for its entry into style .
If the diploid number of an angiospermic plant is 24, the number of chromosomes in the pollen grain, endosperm and integument will be
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12, 36, 12
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12, 24, 36
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12, 12, 36
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12, 36, 24
12, 36, 24; because pollen grains are haploid while endosperm has triploid chromosome number and integument is diploid in nature.
After penetrating stigmatic and styler tissues, the pollen tube usually grow down towards the egg because
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The egg cell attracts the pollen tube as they have dissimilar electric charge
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The filiform apparatus of synergids is believed to attract the pollen tube
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It has no other passage to follow
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It grows under control of nucleus
In porogamy, filiform apparatus of synergids secretes, some chemotropically active sunstances, which direct the pollen tube towards micropyle of ovule.
Intine of pollen grain is made of.
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Callose
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Pecto-cellulose
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Cellulose
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Fat-like sporopollenin
In amoeboid type of tapetum.
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The cells remain in situ
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The cells secrete chemicals for degeneration of middle layers
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The cells pass in between the middle layers
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The cells form plasmodium that passes in between pollen grain mother cells
This type of tapetum can be seen easily in Alisma, Butomus, Tradescantia, and Typha, etc. The tapetal cells fuse among themselves for forming a tapetal plasmodium. The protoplast of the fused tapetal cells then moves into the locule, where they surround the pollen mother cells or pollen grains. This protoplast movement into the locule is taking place during meiotic prophase.
Thus the correct answer is option D.
Wall of a mature pollen grain consists of.
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Ektexine and endexine
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Tapetum and endothecium
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Exine and intine
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Foot and baculate layer
The pollen wall actually is the multi-layered structure that includes an intine, which is composed mainly of polysaccharide, and an exine, which consists mainly of sporopollenin. The exine can be further divided into the sexine and nexine. Sexine is the single layer of bacula which is covered by a layer of the tectum.
So the correct answer is C.