The occurs when there is a drastic reduction in population size due to a sudden change in the environment

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

What are the student's observations and inferences before he starts his investigation?

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos