Different species are distinguished by their...

a. dna

b. diet

c. physical appearance

d. size

a. DNA

Different species are distinguished by their:

1. DNA: Genetic material, specifically the DNA sequence, plays a fundamental role in distinguishing different species. Each species has a unique DNA sequence that is inherited and determines their genetic characteristics.

2. Diet: Different species often have specific diets that are tailored to their physiological needs and ecological niche. For example, carnivores primarily consume meat, while herbivores mainly feed on plants.

3. Physical Appearance: Species can also be distinguished by their physical appearance. This can include characteristics such as coloration, body shape, presence of specific anatomical features, and external structures like wings, fins, or limbs.

4. Size: The size of an organism can also be used to differentiate between species. Some species are much larger or smaller than others, with variations in body length, height, weight, or overall dimensions.