Step 1: Understanding the causes of AIDS.
AIDS (Acquired Immunodeficiency Syndrome) is caused by the HIV (Human Immunodeficiency Virus), which weakens the immune system. Two of the major causes include:
1. **Unprotected sexual contact**: Engaging in sexual activities without protection (such as condoms) with an infected person can transmit the virus.
2. **Sharing contaminated needles**: Sharing needles for drug use, tattoos, or piercings can lead to HIV transmission if the needle is contaminated with infected blood.
Step 2: Conclusion.
Thus, the causes of AIDS are primarily due to sexual transmission and the sharing of contaminated needles.
Fill in the blanks:
(i) Apple is an example of \(\underline{\hspace{2cm}}\) fruit.
(ii) Occurrence of more than one embryos in a seed is called \(\underline{\hspace{2cm}}\) .
(iii) The inner glandular layer of uterus is called \(\underline{\hspace{2cm}}\) .
(iv) Fertilization is taken place in \(\underline{\hspace{2cm}}\) .
(v) \(\underline{\hspace{2cm}}\) conducted hybridization experiments on garden peas for Seven years.
(vi) Natural \(\underline{\hspace{2cm}}\) are obtained from the inflorescences of the plant Cannabis sativa.
(vii) Pyramid of energy is always \(\underline{\hspace{2cm}}\) .
Write answer in one word / one sentence:
(i) Write name of any one autoimmune disease.
(ii) What is the conformities test of Typhoid?
(iii) The number of deaths in the population during the given period. What does it called?
(iv) Write the name of one 'Hotspot' of India.
(v) What is molecular scissors?
(vi) Write the name of first transgenic cow.
(vii) What is the name of the process of copying genetic information of one strand of DNA to RNA?