Dissolved oxygen is important to the health of aquatic species. if there are a large number of algae growing in a body of water, and then they die, the microorganisms will consume the dead algae. when this happens, the amount of dissolved oxygen in the water will

a) stay the same

b) double

c) increase

d) decrease

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

The ratio of the measures of the three angles in a triangle is 14: 15: 11 find the measures of the angles