only about _____percent of the energy contained in a trophic level is transferred between levels

In a food pyramid, the producers are at the

It is so important for human beings to eat ____________ and ___________ to receive energy.

Carnivores that eat the herbivores are called

Primary consumers are also called

Plants are called _________ because they are able to use light energy from the sun to produce food from carbon dioxide and water

Animals that eat other animals are called

Carnivores that eat other carnivores are called

species of hummingbirds had a birth rate of 1000 over the course of a year and a death rate of 400 over the course of a year, the growth rate of hummingbirds for that specific population and time period would be

Animals and people who eat both animals and plants are called

If the number of births is consistently larger than the number of deaths, the population will increase over time

When there are more lions, the giraffe population will increase

Interconnected food chains form a food web

Most animals are only part of one food chain and eat one kind of food in order to meet their food and energy requirements

Populations can continue growing forever

Less food means fewer organisms can feed, which in turn will lead to

a population crash means

which of these are NOT reasons that people think shark populations are declining?

an environmental factor that prevents a population from growing is called a

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