In comparing nucleotide or amino acid sequences, researchers base evolutionary relationships on the assumption that

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

The system breaks down the food we eat, while the system transports the tiny food particles to each cell in the body. a. muscular; circulatory b. digestive; respiratory c. circulatory; digestive d. digestive; circulatory

In science class maria observed a white color and cut flowers she sees that the petals turn red when the flowers sitting in a vase that has red colored water she forms a hypothesis that the color reaches the flower through the stem what should we do to confirm the hypothesis