A) Can excrete salt through glands B) Store salt in the leaves C) Can completely avoid uptake of salt D) Do not live in saltwater A) Can excrete salt through glands B) Store salt in the leaves C) Can completely avoid uptake of salt D) Do not live in saltwater

A) Is usually very poor in organic matter B) Is very rich in organic matter C) Has a very high water content relative to coastal muddy sediments D) Tends to have large grain size A) Is usually very poor in organic matter B) Is very rich in organic matter C) Has a very high water content relative to coastal muddy sediments D) Tends to have large grain size

A) Have roots that penetrate into the oxygenated sediment below B) Must have roots adapted to the anoxic sediment C) Cannot live in regular sea water D) Are common in high-latitude estuaries A) Have roots that penetrate into the oxygenated sediment below B) Must have roots adapted to the anoxic sediment C) Cannot live in regular sea water D) Are common in high-latitude estuaries

A) Are ephemeral and therefore of no biological importance B) Are extremely important as nurseries for many species of fish C) Have salinities too low to support much marine life D) Have relatively low primary production, so species must feed outside the estuary A) Are ephemeral and therefore of no biological importance B) Are extremely important as nurseries for many species of fish C) Have salinities too low to support much marine life D) Have relatively low primary production, so species must feed outside the estuary

A) Affect community structure by preying on competitively important prey species B) Are superior competitors and affect community structure C) Are primary producers D) Are found only in the intertidal zone A) Affect community structure by preying on competitively important prey species B) Are superior competitors and affect community structure C) Are primary producers D) Are found only in the intertidal zone

A) Always are found in the lowest part of the intertidal B) Migrate in longshore currents C) Change vertical position to stay in wave-stirred sediments D) Change vertical position to stay in moist, undisturbed sediments A) Always are found in the lowest part of the intertidal B) Migrate in longshore currents C) Change vertical position to stay in wave-stirred sediments D) Change vertical position to stay in moist, undisturbed sediments

A) Are always embedded in sediment B) Have chemical defenses in the roots against invertebrates C) Are often in water and colonized by sessile invertebrates D) Point into the air A) Are always embedded in sediment B) Have chemical defenses in the roots against invertebrates C) Are often in water and colonized by sessile invertebrates D) Point into the air