Advertisements
Advertisements
प्रश्न
Name one sexually transmitted disease for which no definite cure has been found so far. What is the causative organism of this disease?
उत्तर
AIDS is a sexually transmitted disease for which no definite cure has been found so far. HIV is the causative organism of this disease.
APPEARS IN
संबंधित प्रश्न
Write the full form of the following as it occur in biology :
HIV
What is the name of surgical method of birth control in human females in which the oviducts are cut and ligated (tied) at both ends?
What substances are contained in vaginal pills, used as contraceptives? How do they work?
One of the following is a surgical method which prevents the sperms from reaching the ovum and pregnancy does not occur. This method is :
(a) IUCD
(b) vasectomy
(c) condom
(d) tubectomy
What is contraception ? List three reasons for adopting contraceptive methods.
Explain one application of the following:
Amniocentesis
From the internet, gather information about the chromosome numbers of five animals and five plants. Correlate the number with the size of organism and answer the following questions.
- Do larger organisms have more number of chromosomes/cells?
- Can organism with fewer chromosomes reproduce more easily than organisms with more number of chromosomes?
- More the number of chromosomes/cells greater is the DNA content. Justify.
In figure, mark the positions of the endocrine glands which release the hormones that
- control the release of sex hormone
- are responsible for the secondary sexual characters in boys.
- prevent diabetes.
- maintain the correct salt balance in the blood.
Observe the chart and graph given in figure carefully and answer the following questions.
| Age in Years | % of full height | |
| Boys | Girls | |
| 8 | 72% | 77% |
| 9 | 75% | 81% |
| 10 | 78% | 84% |
| 11 | 81% | 88% |
| 12 | 84% | 91% |
| 13 | 88% | 95% |
| 14 | 92% | 98% |
| 15 | 95% | 99% |
| 16 | 98% | 99.5% |
| 17 | 99% | 100% |
| 18 | 100% | 100% |
- Which of the line represents the height of boys?
- Which line represents the height of girls?
- What is the difference between the pattern of increase in the height of boys and girls?
- Is this pattern true for each individual?
Sex education should involve all of the following except:
