Answer:
What two features are first seen in the planarians? Planarians have bilateral symmetry, which is associated with the development of a head region, such as that seen in the flatworm. Another feature first seen in the flatworm is the possession of three cell layers: ectoderm, endoderm, and mesoderm (the middle layer).
Explanation:
Gravity is the attractive pull between two objects that have mass. The strength of gravity is directly proportional to the amount of mass of each object. ... An object with twice as much mass will exert twice as much gravitational pull on other objects. The gravitational force increases as the size of an object increases
Protein synthesis. The first stage of cellular respiration; glycolysis. Mitosis, and meiosis.
A cell wall
Plant cells have features that animal cells do not have - a cell wall, also they have a large central vacuole, and plastids such as chloroplasts.
hope it helps -Noelle
