Intertidal Zone Species Adaptations

The video explains intertidal zonation, where marine species form horizontal bands along the coast due to tidal movements and environmental stresses. It discusses the physical and biological stresses faced by species in high, mid, and low intertidal zones. The video also covers species adaptations, using examples of barnacles and their competition for space. It concludes by inviting viewers to engage with questions.

What is the primary reason marine organisms like barnacles and seaweeds can survive when the tide goes out?

• They are adapted to the changing tides.

• They move to deeper waters.

• They rely on human intervention.

• They have a special diet.

What creates the horizontal bands of species on the coast?

• The presence of predators.

• Tides and environmental stresses.

• The movement of fish.

• Human activities.

Which type of stress includes desiccation or exposure to air?

• Biological stress

• Nutritional stress

• Physical stress

• Chemical stress

Why does species A spend most of its time underwater?

• It is a poor competitor.

• It feeds on underwater plants.

• It cannot withstand drying out.

• It prefers colder temperatures.

Which species can live in all three intertidal zones but only occupies the upper zone?

• Species B

• Species A

• Species C

• Species D

What is the main reason species B occupies the mid-zone?

• It can resist desiccation better than species A.

• It is a strong competitor.

• It feeds on species C.

• It prefers the high intertidal zone.

Which barnacle species is good at keeping moisture in and can occupy all intertidal zones?

• Species B

• Balanus

• Calamus

• Species A

What happens if the bigger barnacles are removed from the area?

• The smaller barnacles die out.

• The bigger barnacles return.

• The area becomes barren.

• The smaller barnacles move down.

Why can't the bigger barnacles overtake the area if the smaller ones are removed?

• They rely on the smaller barnacles.

• They prefer deeper waters.

• They cannot tolerate drying out.

• They are not good competitors.

What does the example of barnacle species illustrate about intertidal zones?

• The impact of tides on fish.

• The role of human intervention.

• The importance of size in competition.

• The adaptation and competition in intertidal zones.