The nucleus in a body cell of a fly contains 12 chromosomes. How many chromosomes are there in the nucleus of a sperm from this fly?
a) 3 b) 6 c) 12 d) 24

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

Which particle controls what element an atom is?

Explain the causes and effect of damage to the genetic code.