Robert Bajor December 1, 2013 Biology, Environmental Science, Physiology Marking Period 2, Quiz 1 Robert Bajor December 1, 2013 Biology, Environmental Science, Physiology READ THIS ENTIRE BLOG POSTBEFORE COMPLETING YOUR QUIZ I'm going to make my life a little easier and post all three quizzes in this single blog post. (Example: If you're in Biology, complete the Biology Quiz...) Please do not complete quizzes for classes you are not enrolled in. Biology Name * Name First Name Last Name Most enzymes can catalyze… * a. Only one reaction only one time b. Two or three different reactions only one time c. Several reactions over and over again d. Only one reaction over and over again What is the optimum pH for the action of intestinal protease? * a. 5 b. 10 c. 8 d. 12 Why do cells need buffering agents? * a. to maintain constant internal environment at a pH of 10 b. to minimize the changes in pH of the internal environment c. to function properly in an extremely basic internal environment d. to function properly in an extremely acid internal environment A cell membrane is said to be selectively permeable because it * a. Allows all substances to enter and exit the cell b. Allows all substances to enter and some to exit the cell c. Allows only some substances to enter and all substances to exit the cell d. Allows some substances to enter and some substances to leave the cell Which of these substances moves across cell membranes by osmosis? * a. salt b. sugar c. water d. protein Thank you! Environmental Science Name * Name First Name Last Name Which of the following statements correctly describes the transfer of energy that initially enters this system? * a. The sea urchin gets energy from the sea otter. b. The shark receives most of the energy that enters the ecosystem. c. The crab transfers less energy to the next trophic level than does the rockfish. d. The kelp converts energy into a form that can be used by other organisms. Which of the following is most likely to lead to an increase in the number of foxes over time? * a. a decrease in owls b. an increase in hawks c. an increase in mountain lions d. a decrease in raspberry bushes A mutation in an allele in an individual newt gave that newt faster reflexes. It is found that, after many generations, most of the newt population has the new allele. Which of the following most likely caused this change? * a. The newt gave its mutated allele to other adult newts. b. Other newts learned to copy the strategies of the mutated newt. c. The same mutation occurred in other newts as a result of environmental conditions. d. Newts with the mutation are better able to survive and reproduce than newts without the mutation. Which of the following conclusions about mutations in the DNA sequence of a gene is most consistent with the statement? * a. Mutations are always rapidly occurring. b. Mutations are always beneficial. c. Mutations are the only way new species arise. d. Mutations are an important mechanism for the evolution of new species. Which of the following statements best explains why geographic isolation can lead to speciation? * a. Physical separation of populations reduces competition for each group. b. Physical separation of populations prevents interbreeding and mixing of gene pools. c. Physical separation of populations provides more space for each group’s size to increase. d. Physical separation of populations stresses the organisms and causes mutations in their genetic code. Thank you! Physiology Name * Name First Name Last Name Which of the following statements does not characterize the skeleton of a growing child? * a. Epiphyses are separated from diaphysis by a layer of cartilage b. Osteoblasts deposit calcium in the gel-like matrix of cartilage c. The periosteum is present d. The spinal column maintains its concavity. The normal curves of the spine (two concave and two convex): * a. are present at birth b. extend from the skull to the bottom of the ribcage c. give the spine strength to support the weight of the rest of the body d. contain diarthrotic joints Which of the following statements concerning the ribs is true? * a. The first seven pairs attach to the sternum by cartilage b. The last four pairs are called floating ribs because they are free in the front c. The eighth, ninth, and tenth pairs do not move since they are not attached to the sternum d. Males have one less rib than females Which of the following statements regarding the female pelvis is not true? * a. Its shape can be described as broader, shallower, and basin-like when compared to that of the male b. Its pelvic inlet, or brim, is usually wider than that of the male c. Its individual hipbones are usually larger and heavier than those of the male d. The pubic angle is greater than 90˚ Mrs. Teresa Kitterell brought her son John to the emergency room with an injured right leg. After a thorough examination and reading the x-rays, the doctors tell Mrs. Kitterell that her son has an epiphyseal fracture of the thin bone that extends down the distal lateral portion of the leg. According to the doctor, the most likely location for this fracture is the: * a. fibula b. tibia c. femur d. patella Thank you!