[Maximum number: 2]
Pregnancy can occur after the fusion of a male gamete and a female gamete.
(a)
Drug X can be injected into the body. This is one way that HIV can be transmitted. Describe two other ways that HIV can be transmitted.
1
2
[ 2 ]
[Maximum number: 1]
Which method of contraception could also help prevent the spread of HIV?
A
condom
B
contraceptive pill
C
monitoring cervical mucus
D
vasectomy
[Maximum number: 7]
Fig. 4.1 is a diagram of the human female reproductive system.
Fig. 4.1
(a)
Chlamydia is a sexually transmitted infection (STI).
Fig. 4.2 shows the number of reported cases of chlamydia in females in each age group in one country.
Fig. 4.2
Describe the results shown by the data in Fig. 4.2.
[ 3 ]
(b)
Chlamydia is caused by a bacterium.
[ 4 ]
(i)
State the name of one other STI.
[ 1 ]
(ii)
Complete the sentences about the spread of STIs.
STIs are transmitted through the transfer of during sexual contact. One way individuals can avoid the spread of STIs is to use a type of contraception. One example of this type of contraception is
[ 3 ]
[Maximum number: 1]
Which statement about the human immunodeficiency virus (HIV) is correct?
A
Antibodies cannot be made.
B
HIV infections can be treated with antibiotics.
C
HIV destroys lymphocytes.
D
HIV is spread by coughing and sneezing.