A dermatologist who helps teenagers with cystic acne is working with which body system?

integumentary
cardiovascular
muscular
nervous

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen

Some steps in cell division are shown below: 1. chromosomes condense and pair up 2. segments of dna of sister chromatids twist and cross 3. exchange of dna occurs between chromosomes 4. four daughter cells are created that are haploid which of the following steps is least likely to occur during meiosis 1?

What is the name of the protein found in erythrocytes that transports respiratory gases and provides the red color?