7th grade science review

Sharks do not need oxygen to live.

Sharks' gills extract oxygen from the water.

Sharks have lungs that store oxygen.

Sharks absorb oxygen through their skin

Internal Adaptations

External Adaptations

to weight more

bones are lighter for flying

bones are weaker

bones that will be heavier

exerts a lot of energy.

causes adaptations to occur more frequently.

helps them avoid predators.

makes finding necessary resources more likely

Cells

Xylem

Organisms

Tissue

Needle like

Compound Like

Serrated

Rounded

compund

serrated

fan shaped

they need to move to a colder climate where with more ice

they need to travel long distances to get exercise

they need to travel to a warmer climate with more food