Sea stars can move slowly with the aid of A. muscular foot.
B. jointed legs.
C. radial arms.
D. tube feet.

Which is not a characteristic of the animal kingdom? a. they include both vertebrates and invertebrates b. their skin is covered with hair or fur c. they are heterotrophs d. they are eukaryotic

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

What is the compliment dna strand to the following sequence: ttgactaggcta