Muscles are in pairs called "antagonistic muscles." Let's take the human elbow joint as an example from the diagram. The elbow joint has 2 muscles; triceps and biceps. These 2 muscles help raise your forearm up or down. In the diagram, it shows an arrow going up which represents that your forearm is being raised. To raise, your biceps contract and your triceps relax. Its the opposite when you lower yopur forearm. To lower, your biceps relax and your triceps contract.
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Answer:
Otter
Explanation:
Otters depend on yellow perches, if the amount of yellow perches decrease so will its predators.
The bacteria multiply and if they multiply enough you can finally see them.
Answer:
You get to see the leaves change color.
AND YOU CAN CELEBRATE HALLOWEEN!!!!!
AND CARVE A PUMPKIN!
Explanation:
