This plant is an example of a tropism because it is growing towards the sun light.

Weeds are an example of an R-strategist because they have a very high reproductive rate.

An ant pile is the perfect example of population as the group works together to make a house and gather food.

A tomato is a genetically modified organism whose DNA has been modified by genetic engineering techniques.

Yogurt contains eubacteria which is very healthy for the digestive system.