What is the difference between heterozygous dominant and homozygous dominant?

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Witch type of microscope is used to view very small cell components like proteins and dna?

Does anyone know what a poms statement is for biology? i don't know what it is and i have an assignment on it tomorrow, will award the best answer a brainliest!