Refer to the following passage to answer the following questions. Oxygen is a waste product of photosynthesis that reacts readily with iron. Three billion years ago atmospheric oxygen concentration increased and free iron in ocean water decreased as a result of photosynthetic prokaryotes. The decrease in free iron in the ocean was followed by the evolution of photosynthetic eukaryotes. Oxygen concentration continued to increase. The increased oxygen further depleted the remaining free iron in the ocean and led to increased atmospheric oxygen and the emergence of land plants.

The relationship between the evolution of life and the composition of our atmosphere has resulted in many changes to our planet. One of the first major changes was the addition of oxygen due to photosynthetic activity of photosynthetic prokaryotes. What would you expect to find in large amounts in rock bands that formed during this time period?

a
Bands of fossilized dinosaurs
b
Bands of fossilized plants
c
Bands of iron oxides
d
Bands of solid iron

Cedric has a low fever and minor aches. yesterday, he went to the doctor for his booster shot and receive the flu shot. which best explains why he has this reaction?

Hurry i need your (100 points) 1) what are the responsibilities of the region of the brain highlighted below? (picture located below) the highlighted portion is at the rear base of the brain, behind the brain stem. regulating homeostasis, hunger and eating, thirst and drinking, and many other functions of basic survival. coordinating movement and balance by using information from sensory nerves, including hand-eye coordination. controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. 2)which of the following systems or structures is correctly paired with its function? neurons - brain cells that control thoughts, calculations, and memory cerebral cortex - portion of the brain that controls involuntary body movement peripheral nervous system - carries impulses to and from the central nervous system central nervous system - carries information from the nerves to the muscles and glands

Amap's orientation is typically determined by an