Which characteristic do all living organisms show?
A) breathing
B) excretion
C) photosynthesis
D) tropism
▶️ Answer/Explanation
Ans: B
Excretion (B) is a universal characteristic of all living organisms, as they must remove metabolic waste to maintain homeostasis. Breathing (A) applies only to aerobic organisms, photosynthesis (C) is specific to plants/algae, and tropism (D) is a plant response. Thus, the correct answer is B (Excretion).
Which process is carried out by all organisms?
A) growth
B) photosynthesis
C) sexual reproduction
D) transpiration
▶️ Answer/Explanation
Ans: A
Growth (A) is a fundamental characteristic of all living organisms, as they increase in size or cell number during their life cycle.
Photosynthesis (B) is limited to autotrophs, sexual reproduction (C) doesn’t occur in asexual organisms, and transpiration (D) is specific to plants. Since growth is universal, the correct answer is A.