a) The energy source in an ecosystem

b) The position an organism occupies in a food chain or web

c) The number of different species in a biome

d) The amount of sunlight in a habitat

a) A period of extreme rainfall

b) A long period with little or no rainfall

c) A season of high temperatures

d) A time when animals migrate

a) A forest where it is always rainy

b) A forest that has dry periods followed by heavy rains

c) A forest that has cold temperatures throughout the year

d) A forest found only in temperate regions

a) A system that shows the flow of energy through different organisms in an ecosystem

b) A diagram showing how different plants grow

c) A map of the ecosystem's weather patterns

d) A food source for animals only

a) An organism that can be both a producer and a consumer

b) An organism that can only consume food

c) An organism that only photosynthesizes

d) An organism that only eats other consumers

a) A series of interconnected food chains in an ecosystem

b) The physical structure of an ecosystem

c) A single, linear flow of energy

d) The path of nutrients through the soil

a) The process of making food using sunlight

b) The process of using chemical reactions to produce food

c) The method by which plants absorb carbon dioxide

d) The process by which plants make oxygen

a) The process of producing food from sunlight and carbon dioxide

b) The process of producing food from soil nutrients

c) The process of breaking down food for energy

d) The process of making chemicals for photosynthesis

a) Bacteria that produce food through sunlight

b) Bacteria that feed on dead and decaying organic matter

c) Bacteria that live in extreme environments

d) Bacteria that create their own food through chemosynthesis

a) A type of fungi

b) A kingdom of bacteria that live in extreme conditions

c) A group of plants found in temperate forests

d) A group of organisms that only photosynthesize

a) A kingdom of bacteria without a nucleus

b) A group of organisms that include plants, animals, fungi, and protists

c) A species of marine organisms

d) A type of archaebacteria

a) They can photosynthesize

b) They are multicellular and absorb nutrients from other organisms

c) They are always autotrophs

d) They live only in dry climates

a) Autotrophs

b) Mixotrophs

c) Saprotrophs

d) Heterotrophs

a) The movement of energy through an ecosystem

b) The process of transferring nutrients between living organisms and the environment

c) The way animals obtain their energy

d) The method of producing food through sunlight

a) The transfer of energy from one organism to another in an ecosystem

b) The movement of water in an ecosystem

c) The seasonal changes in an ecosystem

d) The decay of dead organisms

A) From producers to consumers in a straight line

B) From decomposers to consumers

c) From consumers to producers

d) From carnivores to herbivores

a) Physical characteristics and evolutionary relationships

b) The usefulness of species to humans

c) The size of the organisms

d) The color of the organisms

a) A classification based on DNA similarities

b) A system based on observable traits without considering evolutionary relationships

c) A system used only by biologists in research

d) A system for grouping plants based on their habitat

a) Grouping organisms based on their appearance

b) Organizing organisms according to their ecological role

c) The evolutionary history and common ancestors of organisms based on DNA similarities

d) The usefulness of organisms to human society