Recall that the cuticle seals plant surfaces and plants conserve water, and the seed derived plant groups to reproduce effectively on dry land. the analogous adaptations in reptiles are (analogous to the cuticle) and (analogous to the seed).

An adult inhales about 6.0×10−4 m3 of fresh air during a breath. only 20% of fresh air is oxygen. assume the pressure in the lungs is 1.0×105 paand the air is at a temperature of 300 k. how many oxygen molecules are in each breath? a. 1.4x10^23 b. 2.9x10^21 c. 4.9x10^-4 d. 2.9 x10^25