Integrated Science: Populations & Communities

Which of these is a population?

• All the trees in a forest

• All the black bears in Ohio

• All the plants in a field

Which is the difference between a population and a community?

• Humans are included as part of a population but not a community

• Populations are always larger than communities, except in the ocean

• Populations include one species; communities include many species

African lions live in groups called prides. The prides travel, hunt, and feed together as a group. The population distribution of African lions is best described as____________.

• Random

• Clumped

• Uniform

When albatrosses (a type of bird) nest, they arrange themselves evenly throughout their habitat, as shown in the picture to the right. What term best describes this population distribution?

• Clumped

• Random

• Uniform

A type of ant and a type of caterpillar are both found in the Rocky Mountains. They both live in mature hardwood forests. The two species occur in similar numbers in their habitat. However, the caterpillars are spread evenly throughout the forest, while the ants are found clustered in groups around their colonies. These species differ mainly in their

• Population densities

• Geographic ranges

• Populations distributions

A population of bacteria can go through several generations in a day, while it takes several years for a population of deer to go through one generation. This means that bacteria and deer have a different __________________________.

• Rate of production

• carrying capacity

• Immigration rate

If the number of rabbits in an environment decreases, then there is not as much food available for foxes. This means the environment's ________________ for foxes has decreased.

• Rate of reproduction

• Carrying capacity

• Immigration rate

Which of these in NOT a part of a species' niche?

• The resources the species needs

• The biological role the species plays in the environment

• What the species looks like when fully grown

A limiting factor that affects populations of all sizes equally is called _______________.

• Density-dependent

• Density-independent

• Physical aspects

Which of these is true of pesticides and herbicides?

• They only affect populations that are very dense, making them a density-dependent limiting factor.

• They only affect population that are very dense, making them a density-independent limiting factor.

• They affect populations of all sizes equally, regardless of density, making them a density-independent limiting factor.