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Select the correct class  

Which of the following are the four key characteristics of chordates?

Which group of mammals has a placenta and rears young in a pouch?

What is the function of the lateral line in fish?

What are spiracles?

Match the characteristic to the correct phylum.

Select the correct phylum  

Solve the equation. Be sure to check your answer.  3a-(6a-7)=31

Fiona is an avid food blogger. If she posts a total of 216 recipes over the course of 36 weeks. How many recipes is she posting each week? Round your answer to the nearest whole recipe.   

Solve the equation. Be sure to check your answer.  16(x+3)= 6(x-5)-5(x+4) -7