Lions live in groups (prides). The dominant male lions sometimes chase some of the male cubs away as they approach sexual maturity, making them leave the pride. Why do you think this is?

Some students grew some radish seeds. The instructions said they needed to be planted 2cm apart. In the experiment, they planted some 0.5cm apart, some 1cm apart and some at the correct distance. They observed that the closer the seeds were planted ...

Which of the following best describes the population curve for a predator-prey relationship?

Working together can give organisms an advantage in competition. What is this called?

Ladybirds feed on insects called aphids. What happens when the number of aphids increases?

What happens to plants and animals that are unsuccessful in competing for resources?

The Forestry Commission have planted lots of trees in Scotland, often in quite wet and boggy countryside. These trees are mainly Sitka spruce, which are evergreen and are planted close together. Which of the following might explain why there are not many plants growing on the forest floor?

In North America, the lynx is an animal that feeds on hares. Which of the following features of the hare will help it run away before a lynx can get close enough to catch it.

When the grey squirrel was introduced to parks in Britain in the 1870s, the numbers of the native red squirrels decreased. Why?

Human beings live all over the world. This means that we must compete with plants and animals. What are we competing for?