Consider statements about human physiology: 1. The kidney filters blood to form urine. 2. The liver produces bile for fat digestion. 3. The spleen produces digestive enzymes. Which are correct? MCQ with Answer and Explanation

Consider statements about human physiology: 1. The kidney filters blood to form urine. 2. The liver produces bile for fat digestion. 3. The spleen produces digestive enzymes. Which are correct?
A. 1, 2 and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
Answer: Option B
Solution (By JKExamLibrary)
The kidneys are the primary excretory organs, filtering blood through nephrons to remove waste products and excess water, forming urine. The liver is a multifunctional organ that produces bile, which is stored in the gall bladder and released into the small intestine to emulsify fats, aiding in their digestion. The spleen is a lymphoid organ involved in filtering blood and immune responses; it does not produce digestive enzymes (the pancreas does). Thus, statements 1 and 2 are correct.

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Question #1
Which of the following is an example of a connective tissue?
A. Epidermis
B. Smooth muscle
C. Neuron
D. Blood

Correct Answer: Option D


Explanation:
Blood is a fluid connective tissue. Epidermis is epithelial tissue, neuron is part of nervous tissue, smooth muscle is muscle tissue. Connective tissues include bone, cartilage, blood, adipose tissue, and areolar tissue, characterized by cells embedded in a matrix. They provide support, protection, and transport.

This question belongs to: Science Biology
Question #2
The botanical name of the rice plant is:
A. Hordeum vulgare
B. Triticum aestivum
C. Oryza sativa
D. Zea mays

Correct Answer: Option C


Explanation:
Oryza sativa is the scientific name of rice, the staple food for a large part of the world. Triticum aestivum is wheat, Zea mays is maize, Hordeum vulgare is barley. All are cereals of the Poaceae family.

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Question #3
Consider statements about evolution: 1. Natural selection was proposed by Darwin. 2. Evolution always leads to perfect organisms. 3. Homologous organs indicate common ancestry. Which are correct?
A. 1 and 2 only
B. 1, 2 and 3
C. 2 and 3 only
D. 1 and 3 only

Correct Answer: Option D


Explanation:
Charles Darwin proposed the theory of evolution by natural selection, where organisms with favorable traits survive and reproduce. Homologous organs share a common structural plan and evolutionary origin, indicating divergent evolution from a common ancestor. Evolution does not lead to perfection; it only results in adaptation to the current environment. Thus, statements 1 and 3 are correct.

This question belongs to: Science Biology