Science Series 2026 - Biology Human 03 Time Left: 8:00 Question 1: The fertilized egg attaches to the uterus wall in a process called: Ovulation Egestion Respiration Implantation Submit Question 2: The safest time to avoid pregnancy by natural method depends on understanding of: Blood group Ovulation period Breathing rate Bone count Submit Question 3: Which of these is a secondary sexual character in boys? Growth of facial hair Development of placenta Start of menstruation Formation of uterus Submit Question 4: Which of these is a secondary sexual character in girls? Deepening of voice like boys Growth of beard Widening of hips Sperm production Submit Question 5: Which term refers to the time taken by sperm to reach the egg after ejaculation (conceptually) requiring movement through: Female reproductive tract Ureter Trachea Spinal cord Submit Question 6: In humans, the sex of the baby is determined by the chromosome carried by the: Placenta Ovum Uterus Sperm Submit Question 7: Which of the following is NOT a reproductive hormone? Testosterone Pepsin Oestrogen Progesterone Submit Question 8: The main purpose of the placenta is to: Store urine for fetus Digest food for mother Pump blood in mother Provide nutrients/oxygen and remove wastes for fetus Submit Question 9: Which statement about menstruation is correct? It occurs in males also It stops permanently after one cycle It occurs only in females and starts at puberty It happens in childhood before puberty Submit Question 10: Which of these would most likely delay puberty? Malnutrition and poor health Balanced diet and exercise Normal hormone levels Adequate sleep Submit Question 11: The phase of pregnancy during which major organs begin forming is the: Adult stage Embryonic stage Egestion stage Menopause stage Submit Question 12: A barrier method of contraception also helps in preventing: Anaemia Goitre STIs Rickets Submit Question 13: The body's defense system against disease-causing organisms is called the: Immune system Reproductive system Skeletal system Digestive system Submit Question 14: Which blood cells are mainly responsible for destroying germs and producing antibodies? Red blood cells Platelets Bone cells White blood cells Submit Question 15: Antibodies are proteins that help by: Digesting starch Producing urine Transporting oxygen Identifying and neutralizing pathogens Submit Question 16: The watery fluid that circulates in lymph vessels is called: Bile Chyme Plasma Lymph Submit Question 17: Lymph is similar to blood plasma but generally has: More red blood cells than blood No water No red blood cells No salts Submit Question 18: Lymph nodes mainly function to: Filter lymph and trap germs Produce bile Pump blood Digest proteins Submit Question 19: Tonsils help protect the body by: Trapping germs entering through mouth and nose Producing urine Storing bile Making RBCs Submit Question 20: The first line of defense of the body is: Skin and mucous membranes Vaccines Red blood cells Antibiotics Submit Previous Next
