Which of these fish are widespread, non-native species now found in many lakes in the Sierra Nevada Mountains? (select all that apply)Group of answer choicesBrook troutLahontan cutthroat troutDelta smeltSpeckled daceBrown trout

Why are the high-elevation fish species (and diversity of species) so different in the Eastern vs. Western Sierra Nevada Mountains?Group of answer choicesThe invasive Little Kern golden trout led to the extinction of most species in the Eastern Sierras.Glaciation led to complete separation of freshwater habitats on the two sides of the mountains.They are not. Most native species are found on both sides, and there are few differences in overall species diversity.There was frequent movement of individuals from one side to the other throughout history.

What type of fish introduced from Asia has become a problem in the Mississippi River system because it grows and reproduces quickly, damaging native ecosystems?Multiple choice question.CarpEelSturgeonCatfish

Select organisms that are common in lakes and ponds.Multiple select question.CoralsSea urchinsInvertebratesPhytoplanktonZooplankton

Which one of the following fish is a surface feeder?RohusMrigalsCommon carpsCatla

Select all of the following that have gills and a cranium but lack jaws.Multiple select question.hagfisheslanceletslampreysbony fishcartilaginous fish