Answer:
Adding tin to copper during melting changes the properties of the metal. The larger tin atoms restrict the movement of the copper atoms, making the material harder.
Explanation:
Please brainliest
Answer:
Cyanobacteria
Explanation:
Cyanobacteria were the first photosynthetic autotrophs that used water molecules as the source of electrons. Cyanobacteria were the first autotrophs that performed oxygenic photosynthesis and carried out the splitting of water.
The process of splitting water released oxygen as a gas (O2) which was released in the atmosphere of the earth as a by-product. This led to the accumulation of oxygen in the atmosphere. Some cyanobacteria can fix nitrogen and have specialized cells called heterocyst which serve as the site for nitrogen fixation.
True Skeletal muscles are the muscles that move your bones; these
muscles are voluntary, meaning they are under your control
True Eventually, all skeletal muscles get tired.
True Cardiac muscle is found in your heart and it is involuntary:
that is, NOT under your control.
True The best way to keep your muscles healthy is to use them.
Answer:
c
Explanation: this is the correct answer
Answer:
B
Explanation:
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