Why do endotherms consume much more food per unit body weight than ectotherms?

What type of competition exsist between two species. turtles and fish

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality

What are some natural processes that represent physical and chemical changes?