In plants water is lost through stomata. Figure 1 shows stomata on the lower surface of a leaf.
Figure 1
0.1 mm
Stoma
0.1 mm
(c)
Calculate the number of stomata per mm2 for the leaf shown in Figure 1.

Provide one reason why mitosis occurs.

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.