Final Exam BSC 1010C 178 Study Guide Questions with Complete Solutions Whether the external temperature is hot or cold, birds maintain an internal body temperature of approximately 40°C. This is an example of ____. - Correct Answer homeostasis Which is responsible for encoding the proteins found in a cell? - Correct Answer genome Which level of organization includes all of the others in the list? - Correct Answer population Molecules are made up of ____. - Correct Answer atoms In the process of biological evolution, new species may evolve through exchange of genes from one species to another. This process is called ___ - Correct Answer horizontal gene transfer.T or F: Vertical evolution, whereby living organisms evolve from a common ancestor ("tree of life"), is the only mechanism of evolution on Earth. - Correct Answer False What is the appropriate order of the stages of investigating whether maple trees drop their leaves in the autumn because of colder days?(1) Maple trees are grown in 2 greenhouses where the only variable is temperature (15°C vs. 10°C).(2) The hypothesis is rejected.(3) There is no statistical difference in the number of leaves dropped at 10°C as compared to 15°C.(4) The observation is that maple trees drop their leaves in autumn.(5) The hypothesis is that maple trees drop their leaves because of colder temperatures - Correct Answer 4, 5, 1, 3, 2 T or F: Discovery-based science and hypothesis testing are the two major scientific approaches that help us understand biology. - Correct Answer True Collecting data without a specific hypothesis in mind is called ____. - Correct Answer discovery-based science 1 / 3
A scientist proposes that bulls can only see the color red. An experiment is created to test this statement. The experiment is performed in Mexico and 6 different bulls are used. Each bull is exposed to a flapping sheet of color in red, blue, green, purple, black, and yellow. The scientist then records the actions of each of the 6 bulls as the different colors are put in front of them. The bulls only react to the color red. The scientist can conclude that bulls do, in fact, only see the color red.What is the independent variable? - Correct Answer the colors of the sheets A researcher hypothesizes that crocodile gender is determined by the incubation temperature of the egg. The hypothesis states that an average nest temperature of 32 - 33 °C results in the birth of male crocodiles while cooler and higher incubation temperatures result in female crocodiles.
What is a valid, testable prediction based on this hypothesis? - Correct Answer Incubation of any crocodile egg at 32°C will result in a male crocodile The first, inner-most energy shell of an atom - Correct Answer can have a maximum of 2 electrons.
T or F: Isotopes are different forms of the same element. - Correct Answer True
Isotopes are different forms of the same element that - Correct Answer differ in their number of neutrons.When one oxygen atom shares two pairs of electrons with another oxygen atom, O2 is formed via a(n) - Correct Answer double covalent bond Nitrogen has 7 electrons and can form a maximum of ________ bonds with other elements. - Correct Answer 3 What type of bonds form from the unequal sharing of electrons? - Correct Answer polar covalent What type of bonding is likely to occur between two water molecules or strands of DNA? - Correct Answer hydrogen In water, MgCl2 dissociates into Mg2+ and Cl-. Based on this information what type of bond is involved in the formation of MgCl2? - Correct Answer ionic 2 / 3
Five unknown compounds are added to water. Four of the compounds go into solution while one does not. What property does water possess that allows these four compounds to dissolve? Why might the fifth compound not dissolve? - Correct Answer The positive and negative charge in water will dissolve many substances; the substance is not structurally similar to water.Hydrophobic interactions... - Correct Answer can hold two nonpolar molecules together.The difference between an acid and a base is that an acid _______, whereas a base _______. - Correct Answer releases H+ ions in solution; accepts H+ ions Buffers are a combination of - Correct Answer a weak acid and a weak base partner.Molecules containing a large number of hydroxyl groups are - Correct Answer polar.The amino and carboxyl functional groups tend to form bases and acids by attracting or dropping - Correct Answer a hydrogen ion.Which of the following statements about hydrolysis reactions is true? - Correct Answer They use water as a reactant.Creation/synthesis of polysaccharides from monosaccharides - Correct Answer result in the formation of water.Which of the following does not represent a correct monomer/polymer pairing? - Correct Answer Triglyceride/cellulose Glycogen is to animal cells as ________ is to plant cells. - Correct Answer starch Lactose, or milk sugar, which is composed of one glucose unit and one galactose sugar unit, can be classified as a - Correct Answer disaccharide.When placed in an aqueous solution, amphipathic molecules will orient themselves with - Correct Answer hydrophobic hydrocarbon chains in the middle, and hydrophilic head groups facing the water.
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