How can scientists know for sure that the cell theory is true? what evidence do we have to prove it?

By what percent will the product of two numbers change, if the first number increases by 70%, while the second number decreases by 40%.

The y-value if a data point corresponding to x1

Tortoise shells and snail shells are similar in function: they protect the organism from predators. based on a comparison of the organisms in the images, what can you conclude? 1. tortoises and snails have homologous organs, and they’re evolutionarily related. 2. tortoises and snails have homologous organs, and they belong to same species. 3. tortoises and snails have analogous organs, and they belong to the same species. 4. tortoises and snails have analogous organs, and they don’t belong to the same species. 5. tortoises and snails have analogous organs, and they aren’t evolutionarily related.