The level of oxygen in the air is measured in a garden and on a city road. Which location has a higher level of oxygen and why? A. The oxygen level is the same in both places because oxygen production by photosynthesis remains constant, regardless of location. B. The oxygen level in the city is higher because the exhaust gases from vehicles produce oxygen through the release of carbon dioxide. C. The oxygen level in the garden is higher because the plants are constantly releasing oxygen through photosynthesis.

Which of the following statements describes how the characteristics of different species of mammals reflect the evolutionary relationships among those species? shared anatomy among mammals, such as hair and mammary glands, suggests that a common ancestral species had these features. similarities in the dna and protein structures of mammal species suggest that these species evolved from a common ancestor. although all modern species of mammals share some features, the differences between them mean they cannot share a common ancestor.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

What is the difference between an igneous, sedimentary and metamorphic rock