Explain what is meant by the term 'conservation of mass'. Give your answer in terms of the atoms that take part in a chemical reaction. (3 marks)

Why do frogs retract their eyes

How do you identify if a compound is polar covalent non polar covalent. Also identify if it is polar or non polar without using the electronegativity chart?

Chapter 12 and 13 assessment Data suggest that the average global temperature will increase by 2°C by the year 2030. If this occurs, a major concern for humans would most likely be that- o the threat of extinction of land organisms will decrease.

What is the frequency of initial disturbance in Primary Succession and in Secondary Succession? Also what is the Severity of initial disturbance in the both.

Which characteristics is used to categorize the different kinds of animal-like prostists?

Using your knowledge of the normal process of gametogenesis and fertilization, formulate a hypothesis as to how a chimeric individual could form.

How are diffusion and osmosis different? A. Osmosis is the movement of proteins. Diffusion is the movement of water. B. Osmosis is the movement of water. Diffusion is the movement of chemicals and molecules. C.

Hich term describes the maintenance of a steady internal state in the body?

Natural Killer cells react in predictable ways. Put the following steps in order to describe the actions of an activated NK cell. A. Recognition and adhesion B. Section of perforins C. Lysis of the abnormal cell D. Realignment of Golgi apparatus

In the Hershey-Chase experiment, the material that entered cells upon infection by T2 virus was labeled with which radioactive isotope?