7. AQA GCSE Biology: Ecology Exam Questions and Answers 100% Verified and Updated

7. AQA GCSE Biology: Ecology Exam Questions and Answers 100% Verified and Updated Ecosystem - Answer️️ -The interaction of a community of living organisms with the non-living parts of their environment What is a community made up of? - Answer️️ -The populations of different species or organisms that are all interdependent in a habitat Habitat - Answer️️ -The environment in which an organism lives Population - Answer️️ -The total number of organisms of the same species living in the same geographical area Interdependence - Answer️️ -The way in which each species within a community depends on other species for food, shelter, pollination, seed dispersal etc Competition - Answer️️ -The process by which living organisms compete with each other for limited resources (such as food, light or reproductive partners) What do organisms require to survive and reproduce? - Answer️️ -A supply of materials from their surroundings and from the other living organisms there What do plants often compete with each other for? (4) - Answer️️ -Light, space, water, and mineral ions from the soil What do animals compete with each other for? (3) - Answer️️ -Food, mates and territory Stable community - Answer️️ -Where all the species and environmental factors are in balance so that population sizes remain fairly constant What happens if one species is removed from a community? - Answer️️ -It can affect the whole community Abiotic factors - Answer️️ -Non-living factors Biotic factors - Answer️️ -Living factors Name 7 abiotic factors and how they might affect a community - Answer️️ -Litmuswoc 1. Light intensity - photosynthesis, breeding cycles linked to day length 2. Temperature - photosynthesis/plant growth, therefore animals which can survive 3. Moisture levels - both plants and animals need water to survuve 4. Soil pH and mineral content - distribution of plants, most struggle to grow where there is few mineral ions; low pH inhibits decay and therefore release of mineral ions 5. Wind intensity and direction - shape of trees and landscape, increases plant transpiration 6. Availability of oxygen - aquatic animals e.g. fish require high