Short Answer TypeName the causative organism of the disease amoebiasis. List three symptoms of the disease.
Prior to a sports event blood and urine samples of sports-persons are collected for drug tests.
(a) Why is there a need to conduct such tests/
(b) Name the drugs the authorities usually look for.
(c) Write the generic names of two plants from which these drugs are obtained.
(a) Ther is need to conduct tests like bllod and urine test because some sportspersons resort to unfair practices to enhance their performance. Often the sportsperson take drugs like narcotics analgesics, anabolic steroids, diuretics and certain hormones in sports to increase muscle strength and performance. The blood test and urine test usually indicates whetehr the person has taken any drugs or not and thus ensures fair play.
(b) The authorities should look for narcotics analgesics, anabolic steroids, diuretics, certain hormones - gonadotropins. Opiate-like drugs, e.g. Vicodin, Percocet or OxyContin, and cannabinoids.
(c) Generic names of the plants from which drugs are obtained are as follows:
Smack or Heroin commonly called as Papaver somniferum -
Ganja, Marijuana obtained from Cannabis sativa.
(i) Write the scientific names of the two species of filarial worms causing filariasis.
(ii) How do they affect the body of infected person(s)?
(iii) How does the disease spread?
A mature embryo sac in a flowering plant may possess 7-cells, but 8-nuclei. Explain with the help of a diagram only.
In an agricultural field, there is a prevalence of the following organisms and crop diseases which are affecting the crop yield badly:
(a) White rust (b) Leaf and stripe rust
(c) Black rot (d) Jussids
Recommend the varieties of crops the farmers should grow to get rid of the existing problem and thus, improve the crop yield.
Switch
