What are three things scientist must do for their experiment to be scientific

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box