Which of the following classes of arthropods contains crayfish?

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

Which of the following is a characteristic of ray-finned fish?

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.   

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

Solve the equation. Be sure to check your answer. Type your answer as a improper fraction, if necessary. 

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.   

Express the ratio in lowest terms. Be sure to enter your fraction using the “/” key on your keyboard.    

Which of the following are risk factors for breast cancer? Select all that apply. 

Determine whether the proportion is true or false.