What causes an electric charge? 1)the movement of electrons due to a difference in electric potential energy
2)the movement of protons due to a difference in electric potential energy
3)the movement of neutrons due to a waterfall
4)the movement of electrons due to kinetic energy

Crossing over is a method of (blank)?

Draw a simple labelled diagram if a collenchyma tissue

(05.01 mc) west indian manatees are large aquatic mammals that live in rivers and near shore estuaries, especially in florida. they have two flexible front flippers with three or four toenails, similar to elephant toenails. though they lack hind limbs, manatees have vestigial pelvic bones, as shown in the diagram. manatee and elephant skeletons are shown side-by-side. the manatee, an aquatic animal, has a skeleton that has two large front limbs and two very tiny hind limb bones that do not form actual limbs. the elephant has four large limbs. which of the following answer choices best describes how evidence of the manatee toenails and pelvic bones supports the scientific theory of evolution of these animals? (1 point)