Does this graph show an endothermic of exothermic reaction? (WILL GIVE BRAINLIEST)

1. endothermic, because the products are at a lower energy state in the reactants
2. endothermic, because it takes a lot of energy to cause the reaction to occur
3. exothermic, because the products are at a lower energy state in the reactants
4. exothermic, because it takes a lot of energy to cause the reaction to occur

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Number and variety of living organisms includes genetic, species, and ecological types