Biologist ________________________Date ____________MID TERM REVIEW - Short Answer 1.To study the effects of a mineral deficiency, a number of rats are divided into two groups: one group is fed a normal diet, whereas the other group is fed the same diet but with one necessary mineral left out. The animals receiving the normal diet remained healthy; those in the other group grew weaker. Formulate a hypothesis based onthis experiment.2.Which characteristic of living things is important to the survival of a group of animals rather than an individual member of this group? Why?3.Give an example of a stimulus that you respond to and describe your response to that stimulus.4.What are two ways in which all living things are similar at the molecular level?5.What is the metric system?6.Why are atoms considered neutral?7.What is mass number?8.Can you predict the properties of a compound by knowing the properties of the elements that make up the compound? Explain your answer.9.Describe how a sodium atom forms a bond with a chlorine atom.10.When H2gas and O2gas react to form water, what happens to the atoms that were in the gases, and what kind of bonds result?11.What accounts for water’s properties of adhesion and cohesion?12.Why are water molecules polar?13.What is a mixture?14.Use the terms solventand soluteto describe how to prepare a salt solution.15.What are three jobs that proteins do in your body?16.Where does the energy that enables you to breathe and think come from?Figure 3–1
17.Using Figure 3–1, explain the relationship between sharks and the sun.18.Why are decomposers the final consumers in every food chain?19.Consider a food web in which snakes eat mice; toads eat beetles; owls eat mice and toads; eagles eat rabbits, snakes, and owls; cougars eat deer; and foxes eat rabbits and mice. What animal occupies (gets energy in) more than one trophic level? Explain.20.Describe the flow of energy to a third-level consumer if the producers provide 1500 calories of energy to the first-level consumers.21.What does the cell theory say?Figure 7–822.Is the cell in Figure 7–8 above a prokaryote or a eukaryote? What features help you determine your answer?23.How do prokaryotes and eukaryotes differ?24.What are two functions of the nucleus?25.List two functions of the cytoskeleton.