What are agents like radiation or chemical substances that can alter or break the DNA molecule that makes up a chromosome? a. mutations

b. modifications

c. metamorphosis

d. mutagens

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from