Byssal threads are used by mussels to cope with.

Question

1 of 25

The lower limit of the intertidal zone is the

average high tide.

average middle tide.

lowest tide.

lowest edge of the rocky substrate.

None of the above choices are correct: it varies according to type of substrate.

Question

2 of 25

The particular characteristic most widely used in classifying intertidal communities is which of the following?

Type of tides

Relative exposure to air

Type of substrate

Type of seaweeds

Relative immersion by water

Question

3 of 25

Which of the following strategies is not used to avoid desiccation in the intertidal?

Closing shells

Crowding in areas that are always moist

Burrowing into substrate

Mucus

Moving out of tide pools

Question

4 of 25

Most sessile animals living on rocky shores are which of the following?

Deposit feeders

Carnivores

Detritus feeders

Filter feeders

Grazers

Question

5 of 25

If a rocky shore highly exposed to wave action is compared to a similar rocky shore that is a lot less exposed to wave action, one should expect that barnacles living on the more exposed shore show a

wider vertical distribution.

narrower tolerance to salinity.

narrower tolerance to temperature.

narrower vertical distribution.

higher resistance to predators.

Question

6 of 25

Byssal threads are used by mussels to cope with.

desiccation.

wave shock.

restricted feeding.

salinity changes.

temperature changes.