Answer:
Changes of state are physical changes. They occur when matter absorbs or loses energy. Processes in which matter changes between liquid and solid states are freezing and melting. Processes in which matter changes between liquid and gaseous states are vaporization, evaporation, and condensation.
Theories are a collection of scientific data that is generally accepted and reproducible. Theories are a result from several repeated experiments, but theories are not based on a single hypothesis. Several hypotheses are tested and appraised to become a well accepted theory. Theories may also be revised over time and can predict what may happen in the future. On the other hand, theories are not proven facts.
Answer: C. Histologist
Explanation:
A cell biologist refers to a person who studies cells and their functions and their interactions with the biological organisms.
A taxonomist refers to a biologist who classifies organisms into their categories.
A histologist, can also be called a histotechnician, and this is someone who prepares tissue samples for the pathologist to study. A histologist cut samples from organs which are used for microscopic tissue analysis.
Palaeontologist is a person who studies fossils in order to get information regarding life on Earth.
B) The atria only recieve blood and the Ventricles have to pump the blood
