Review Questions Unit 1 PDF

Review questions and In-class activities Unit 1 review questions 1  Review Questions from Lecture 1 1. Which of the following is not characteristic of living things? (a) all living things possess inherited information, encoded in DNA (b) all livin...

Review questions and In-class activities Unit 1 review questions 1  Review Questions from Lecture 1 1. Which of the following is not characteristic of living things? (a) all living things possess inherited information, encoded in DNA (b) all living things can respond to their environment (c) all living things can maintain a relatively constant internal environment (d) all living things evolved from other living things (e) all living things are composed of more than one cell Unit 1 review questions 2  Review Questions from Lecture 1 2. In conducting a scientific experiment, what is the difference between the experimental group and the control group? – The Experimental group experiences the test conditions. The Control group serves as the reference group and does not experience the test conditions – The Experimental group experiences the change in variables while the Control group serves as the reference group and does not experience any change in variables Unit 1 review questions 3  Review question for Lecture 2 Question: Explain why an individual organism cannot evolve Natural selection does not create new traits, but edits or selects for traits already present in the population. The individual with traits that that allow better survival will pass along those traits to their offspring. Over time, the population changes Unit 1 review questions 4  Review question for Lecture 3 1. Compared with 31P, the radioactive isotope 32P has: a) a different atomic number b) one more neutron c) one more proton d) one more electron e) a different charge Unit 1 review questions 5  Duroia hirsuta trees live alone Ants kill nonhosts trees by injecting the leaves with formic acid, thus creating hospitable habitats for the ant colony formic acid Unit 1 review questions 6  Duroia hirsuta trees live alone Dead leaf tissue (cm2) 16 after one day 12 8 4 0 Inside, Inside, Outside, Outside, unprotecte protecte unprotecte protected d d d Cedrela saplings, inside and outside devil’s gardens What if: D. hirsuta trees, rather than the ants release a chemical that prevents other trees from growing What would the graph above look like? Unit 1 review questions 7  Duroia hirsuta trees live alone Dead leaf tissue (cm2) 16 after one day 12 8 4 0 Inside, Inside, Outside, Outside, unprotected protected unprotected protected Cedrela saplings, inside and outside devil’s gardens What if: D. hirsuta trees, rather than the ants release a chemical that prevents other trees from growing What would the graph above look like? Unit 1 review questions 8  Activity 3 1. How would you respond to the following statement, “We don’t need to worry about industry or agriculture contaminating the environment. After all, all these chemicals are made up of atoms that are already in the environment and also are part of living things”. --We would respond by saying that just because chemicals are made up of atoms doesn’t mean they are good for the environment --We do need to worry about it because chemicals aren’t the same as atoms, they have difference properties --This statement is incorrect because yes, everything is made up of atoms, the atoms objectively don’t cause harm. However, they can be paired with other atoms and applied in a harmful way. --The chemicals might be made up of the same atoms are most likely different in structure, making them different than the elements found in nature, which be harmful and contaminating to the environment Unit 1 review questions 9  Review Question from Lecture 4 1. Referring to the structures below, which one(s) would not be expected to be a polar molecule? (a), (b), and (d) would not be expected to be polar molecules as the two nuclei in each case does not differ in the attractive force for the shared electrons. Therefore, the electrons are equally shared in the molecule Unit 1 review questions 10  Questions Show hydrogen bonding between water molecules Describe the property of water that is useful for keeping the temperature constant in a lake Water has a high heat capacity so it is able to absorb a large amount of heat and still maintain a constant temperature Unit 1 review questions 11  Activity 4 1. Right before a predicted overnight freeze, farmers spray water on crops to protect the plants. Use the properties of water to explain how this method works. Be sure to mention why hydrogen bonds are responsible for this phenomenon. Farmers who spray their crops with water are taking advantage of the transfer of energy that happens when water changes state. Water contains one oxygen and two hydrogen atoms. The oxygen atom is slightly negative and the hydrogen atoms are positive so they tend to stay together and form hydrogen bonds. Energy is released when hydrogen bonds begin to form and water solidifies. This is called the latent heat of fusion. The ice that builds upon the plants insulates them from the colder surrounding air temperature. Unit 1 review questions 12  Review Questions from Lecture 5 1. Why would two hydrocarbons with the same molecular formula of C4H10 (each molecule contains 4 carbons and 10 hydrogens) behave differently? Although the two molecules have the same formula, the arrangement of the atoms might be different. For example, the molecule may be a straight chain or it could be branched, or arranged in a ring. These two molecules are isomers 2. Describe a dehydration reaction. What molecule(s) is formed A dehydration reaction is the joining of two molecules with the formation of a water molecule (H2O) by the removal of a hydroxyl group (OH) from one molecule and a hydrogen atom (H) from another molecule. In addition to the water molecule, a larger polymer is formed from the joining of the two monomers Unit 1 review questions 13  Review Questions from Lecture 5 2. Describe a dehydration reaction. What molecule(s) is formed Unit 1 review questions 14  Review Question from Lecture 6 2. Protein structure plays an important role in which function? (a) movement of muscles (b) catalyzing biochemical reactions (c) carrying nutrients in the body (d) all of the above (e) none of the above Unit 1 review questions 15