Fish populations may decline when excess Blank______ smother gravel beds where fish lay their eggs.Multiple choice question.acid pollutantssedimentsnonmetallic saltsnutrients

Question 1(Multiple Choice Worth 3 points)(06.04 MC)Which of the following problems are environmental indicators of acid deposition?Decreased pH levels in lakes and riversDecreased concentration of aluminum in the soilChanges in development of indicator organisms of an ecosystem II only III only I and III I and II

When compared to their environment, freshwater vertebrates have Blank______ solute concentration in their fluids.Multiple choice question.a lowera higherthe same

Nutrient pollution in aquatic habitats may lead to an increase in theMultiple choice question.fish populations.amount of algae.ozone layer.amount of oxygen in the water.

Select all that applyThe vitamin E content of a food may be decreased by _______.Multiple select question.deep-fat fryingrefrigerationexposure to sunlightexposure to oxygen

Multiple Choice QuestionWater with a high oxygen content (greater than 6 ppm) will support Blank______, which is an indicator of good water quality.Multiple choice question.game fishmainly worms and bacteriaonly decomposers