AP BIOLOGY

Detailed explanation-1: -A dog salivating at the smell of food, a flower opening in sunlight and a worm crawling towards moisture are examples of organisms responding to stimuli from their surroundings. All organisms respond to their surroundings in order to improve their chances of survival and reproduction.

Detailed explanation-2: -All living things are able to respond to stimuli in the external environment. For example, living things respond to changes in light, heat, sound, and chemical and mechanical contact.

Detailed explanation-3: -They have to adapt to every change that occurs or else they will slowly die out. The strongest of species react to changes in their environment by adapting and evolving suitably, while some weaker species that are unable to adapt react by either migrating elsewhere or by going extinct.

Detailed explanation-4: -Birds, insects, animals, trees, human beings, are a few examples of living things as they have the same characteristic features, like eating, breathing, reproduction, growth, and development, etc.