In the two-stage cooling method, what is the maximum amount of time allowed for stage one (cooling food from 135 to 70 degrees f)

What would happen if the krill were removed from the food web

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.

People with one sickle cell allele are not likely to get malaria. what is this an example of?