Organ
The heart is a muscular organ that is part of the circulatory system.
Answer:
Hydrogen
Explanation:
Basically, stars are big exploding balls of gas, mostly hydrogen and helium.
the Carcharodon megalodon is an extinct megatoothed shark. megalodon was an apex predator of its time, and possibly the largest and most powerful macro-predatory fish that ever lived. Carcharodon may have approached a maximum of around 67 feet in total length.
Answer:
1. freshwater
2. estuary
3. intertidal
4. marine
5. deep
6. true
7. false (3 percent)
8. false (larger and deeper)
9. false (surface)
10. true
Explanation:
Answer:
All of the above
Explanation:
The Paleozoic Era consists of 6 different periods:
1. Cambrian
2. Ordovician
3. Silurian
4. Devonian
5. Carboniferous
6. Permian
