Why will discharge of sewage wastes into lakes and rivers having abundant varieties of fish eventually eliminate much of the diversity of fish? a.) the amount of oxygen available will be markedly reduced. b.) the waters will become turbid (cloudy), making it difficult for the fish to find their prey. c.) the waters will be excessively heated with thermal pollution. d.) the number of spots where fish can lay their eggs will be reduced.

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?