The scientist konstantin mereschkowsky knew in the early 1900s that plants make their own food by using sunlight. he also saw tiny parts in plants called chloroplasts that do not appear in any animals. he hypothesized that chloroplasts are what plants make food. after many more observations of all types of plants and animals, scientists are convinced today that chloroplasts make food for plants. has the study of chloroplasts been scientific or pseudoscientific? a. scientific, because a hypothesis and observations were made and then a conclusion was drawn b. scientific, because scientists made a hypothesis and conclusion before making any observations c. pseudoscience, because a hypothesis was believed to be true before any observations were made d. pseudoscience, because beliefs in chloroplasts are based on subjective opinions

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.