The answers that fit the given blanks above are EXTENSOR and FLEXOR, respectively. Extensor muscles are those muscles that contract once extended and flexor muscles are those muscles that contract once flexed. When you extend, you move the limb away from the trunk; and when you flex, you are moving it toward the trunk.
Answer:
They look like X's (X shape)
Explanation:
The X shape are replicated chromosomes and are called the sister chromatids.
Answer:
B
Explanation:
We breath in oxygen, and we breath out carbon dioxide. Plants breath from the sun.
Answer:
Organelle and other structures have vessels that are collectively referred to as the endomembrane system
Answer:
Yes, because a new material of a different color formed on part of the metal strip
Explanation: Good luck!