Which of these are long strands of DNA?
A. Chromosomes
B. Fossils
C. Genes
D. Mutations

*will mark brainliest to first correct answer* photosynthesis led to increasing levels during the later proterozoic eon? a. oxygen b. water c. carbon dioxide d. none of the above

Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the trait of color blindness. the only unknown is the mother in the first generation

Witch theory suggests all living things are made up of cell or cells