Is the amount of input energy needed to start a chemical reaction?

Which beat describes the brain stem

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

In which of the following relationships is one organism always benefited while the other organism is always harmed