Chromosomes are structures that hold DNA, and are usually represented by all ’s in girls, while boys also include a chromosome, in shape. * 4 points
a.2N; X
b. Y; X
c. X; 2N
d. X; Y
e. Y; 2N

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

Mention true or false : a) cholera is marked by acute diarrhea and no urination. b)mosquitoes are the source of dysentery germs.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?