Science Series 2026 - Biology Human 03

Question 1: The fertilized egg attaches to the uterus wall in a process called:

Ovulation

Egestion

Respiration

Implantation

Question 2: The safest time to avoid pregnancy by natural method depends on understanding of:

Blood group

Ovulation period

Breathing rate

Bone count

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

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

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

Question 6: In humans, the sex of the baby is determined by the chromosome carried by the:

Placenta

Ovum

Uterus

Sperm

Question 7: Which of the following is NOT a reproductive hormone?

Testosterone

Pepsin

Oestrogen

Progesterone

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

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

Question 10: Which of these would most likely delay puberty?

Malnutrition and poor health

Balanced diet and exercise

Normal hormone levels

Adequate sleep

Question 11: The phase of pregnancy during which major organs begin forming is the:

Adult stage

Embryonic stage

Egestion stage

Menopause stage

Question 12: A barrier method of contraception also helps in preventing:

Anaemia

Goitre

STIs

Rickets

Question 13: The body's defense system against disease-causing organisms is called the:

Immune system

Reproductive system

Skeletal system

Digestive system

Question 14: Which blood cells are mainly responsible for destroying germs and producing antibodies?

Red blood cells

Platelets

Bone cells

White blood cells

Question 15: Antibodies are proteins that help by:

Digesting starch

Producing urine

Transporting oxygen

Identifying and neutralizing pathogens

Question 16: The watery fluid that circulates in lymph vessels is called:

Bile

Chyme

Plasma

Lymph

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

Question 18: Lymph nodes mainly function to:

Filter lymph and trap germs

Produce bile

Pump blood

Digest proteins

Question 19: Tonsils help protect the body by:

Trapping germs entering through mouth and nose

Producing urine

Storing bile

Making RBCs

Question 20: The first line of defense of the body is:

Skin and mucous membranes

Vaccines

Red blood cells

Antibiotics

Quizzes » Science Series 2026 - Biology Human 03