Sharks feed at or near the tops of their food webs and remove sick or injured animals from their ecosystem. Without this ecosystem service, oceans would be full of dead or dying animals. Sharks also influence the feeding habits of other animals to help keep the oceans clean. Because of these ecosystem services sharks are considered:

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease

Construct at least two possible hypotheses for the student’s experiment.