Question from campbell biology chapter 16:
42) which of the following represents the order of increasingly higher levels of organization of chromatin?
a) nucleosome, 30-nm chromatin fiber, looped domain
b) looped domain, 30-nm chromatin fiber, nucleosome
c) looped domain, nucleosome, 30-nm chromatin fiber
d) nucleosome, looped domain, 30-nm chromatin fiber
e) 30-nm chromatin fiber, nucleosome, looped domain

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

Cells destroy body cells infected by a virus or bacteria.

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d