B. Catalysts are not changed during a chemical reaction.
The temperature is lowest at the crust. As you get lower into the Earth's surface, the temperature gets hotter.
A.Revise her hypothesis, and then retest it
Just like the name suggests it's the second consumer in a food web or food chain that eats the primary consumers or the producers.
Answer: sexual reproduction.
Explanation: In asexual reproduction there is no exchange of genetic characteristics due to the lack of fusion of gametes(haploid). Thus there is practically no variation in specie.
But in sexual reproduction there is exchange of genetic characteristics resulting from the fusion of haploid gametes hence there is variation and great diversity.
