How do you really know when something is alive? what's your test for deciding if something is alive? how would explain your definition of life to a child?

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

Which organelle breaks down sugar molecules that supply energy to the cell ?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above