Why is carbon dioxide important for plants?
What is the first element of the food web?
Every ecosystem supplies the basic needs for the organisms that live there. What are the basic needs of all organisms?
During which stage of complete metamorphosis does an insect change itself completely from a larva to an adult?
Which organism in a food web is a producer?
Ecosystem change for many different reasons. Which of the following is a natural cause of changes in an ecosystem?
Saguro Cacti live in parts of California, Arizona and Mexico. Gila woodpeckers build their nests inside saguro cacti. The saguro cacti and the gila woodpeckers are both part of the same:
Which organisms release oxygen into the air as part of the carbon dioxide - oxygen cycle?
Plants in a food web are:
Which of the following statements is correct?
The purpose of a food chain is to show:
Living things that make their own food using air, light, soil and water are called:
People can affect environment in both good and bad ways. Which is one way that people can affect the environment in a good way?
A porcupine is covered with a coat of sharp spines called quills. Quills help the porcupine survive in its environment by:
The plants process of making food and releasing oxygen into the air is called:
The falcon has a sharp, hooked beak. It also has sharp, curved claws called talons. The falcon's beak and talons are most likely adaptations for:
Insects go through stages to grow and change form. This process is called:
If the mouse population disappeared from the ecosystem, the fox would most likely:
Which of the following statements is correct?
Some insects hatch directly from eggs during incomplete metamorphosis. These young insects are called: