The structure in the female reproductive system where the fetus develops is the: MCQ with Answer and Explanation

The structure in the female reproductive system where the fetus develops is the:
A. Vagina
B. Uterus
C. Ovary
D. Fallopian tube
Answer: Option B
Solution (By JKSSB Mock Tests)
The uterus is a hollow, muscular organ where the fertilized egg implants into the endometrium and develops into an embryo and fetus. The ovaries produce eggs and hormones, the fallopian tubes are the fertilization site, and the vagina is the birth canal and copulatory organ.

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Practice More Biology Questions

Question #1
The molecule that acts as the universal energy carrier in cells is:
A. Glucose
B. ATP
C. NADPH
D. Acetyl CoA

Correct Answer: Option B


Explanation:
ATP (adenosine triphosphate) is the immediate energy currency for cellular processes. Hydrolysis of its high-energy phosphate bonds releases energy. Glucose and acetyl CoA are fuels, NADPH is an electron donor for biosynthesis. ATP is generated by substrate-level phosphorylation and oxidative phosphorylation.

This question belongs to: Science Biology
Question #2
The condition in which the blood has a lower than normal number of red blood cells or hemoglobin is:
A. Thalassemia
B. Anemia
C. Polycythemia
D. Leukemia

Correct Answer: Option B


Explanation:
Anemia is a deficiency in RBCs or hemoglobin, reducing oxygen-carrying capacity. Causes: iron deficiency, vitamin B₁₂/folate deficiency, blood loss, hemolysis. Polycythemia is excess RBCs, leukemia is cancer of WBCs, thalassemia is a genetic hemoglobin disorder leading to anemia. Anemia causes fatigue and pallor.

This question belongs to: Science Biology
Question #3
In an ecological food chain, the 10% law of energy transfer implies that if producers fix 10,000 kcal of energy, the energy available to the tertiary consumers will be:
A. 1 kcal
B. 100 kcal
C. 10 kcal
D. 1,000 kcal

Correct Answer: Option C


Explanation:
According to Lindeman's 10% law, only about 10% of the energy from one trophic level is transferred to the next; the rest is lost as heat through respiration. Producers (Trophic Level 1) have 10,000 kcal. Primary consumers (Level 2) get 10% of 10,000 = 1,000 kcal. Secondary consumers (Level 3) get 10% of 1,000 = 100 kcal. Tertiary consumers (Level 4) get 10% of 100 = 10 kcal.

This question belongs to: Science Biology