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Select which of the below are uses of feathers in birds (hint: there are three answers)

Match the below features of cephalopods to their descriptions: 

Which of the below describes negative pressure ventilation? 

The skeleton of sea urchins is made of plates with spines extending from the skeleton. 

Which of the below most accurately describes insect repiratory systems? 

The segmental arrangement of body parts in an animal is called? 

Mites and ticks have no medical relevance and are considered more pests than dangerous to humans. 

Match the below glandular cells to their functions 

Gas exchange in crayfish is a result of? 

Select which of the below is true about phospholipids.