Bacteria Sort the producers, consumers, and decomposers by
dragging each word to the correct category:
Checkar
Tiger
Fungi
Shark
Flower
Earthworms
PRODUCERS
CONSUMERS
DECOMPOSERS
Tree
Deer
Seaweed
Grass
Beetles
Cricket
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Every living organism on earth depends on and interacts with other living and non-living things to stay alive. Organisms depend on other organisms for food for example, and also depend on their environment for protection and a place to stay. The particular branch of Science that studies how organisms interact with other organisms and their environment is called ecology. Someone who studies these relationships and interactions is called an ecologist.

Ecological interactions

The ecological interactions that take place within a specific area are generally classified into four levels: populations, communities, ecosystems and the biosphere.

Look at the following illustration which shows the levels of organisation.

Individuals live together in populations. Different populations together make up a community. Communities together with the non-living things in their surroundings make up an ecosystem. All the ecosystems on Earth make up the biosphere.

You may have heard of terms such as the biosphere and ecosystems in previous grades. What about populations and communities? You may have also heard about the population of people in South Africa, or when someone talks about your local community at home. What do we mean when we use these terms in ecology? Let's take a closer look.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

answer; i believe the answer is (polygenic inheritance;