Which statement correctly compares the number of chromosomes in a body cell to that in a sex cell of humans?

a. a body cell has 21 chromosomes; a sex cell has 23

b. a body cell has 21 chromosomes; a sex cell has two

c. a body cell has 46 chromosomes; a sex cell has 23

d. a body cell has 46 chromosomes; a sex cell has two

In an energy pyramid, which level has the most available energy?

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.