Which question could be answered using the scientific method? (2 points) select one: a. why does my dog like to sit on the sofa? incorrect b. would mars be a fun place to live? c. are butterflies happy? d. do vitamins people stay healthy?

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?