Coal is a basic source of chemical energy . Wood is also a source of chemical energy . Even there are more many sources like gasoline,photosynthesis
Natural selection a process that occurs over successive generations and is defined as the differential reproduction of genotypes. Natural selection requires heritable variations in a given trait
A leaf is xylem the of function the is what
Answer:
Explanation:
There are many examples of fossils found on separate continents and nowhere else, suggesting the continents were once joined. If Continental Drift had not occurred, the alternative explanations would be:
The species evolved independently on separate continents – contradicting Darwin’s theory of evolution.
They swam to the other continent/s in breeding pairs to establish a second population.
