Living Environment Exam #1

Which cell structure do nutrients pass through to enter a cell? 1. cell membrane 2.chloroplast 3.cytoplasm 4.nucleus

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An experiment is carried out to determine how different pH values of soil will affect the growth of tomato plants. In this experiment, the dependent variable could be the 1. height of the tomato plants 2. pH of the soil 3. specific variety of tomato plants used 4. pH of enzymes in tomato leaf cells

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Anhidrosis is the inability to sweat normally. If the human body cannot sweat properly, it cannot cool itself, which is potentially harmful. Anhidrosis most directly interferes with 1. a feedback mechanism that maintains homeostasis 2. an immune system response to harmless antigens 3. the synthesis of hormones in the circulatory system 4. the enzymatic breakdown of water in cells

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Mitochondria provide ribosomes with 1. ATP for protein synthesis 2. amino acids for protein synthesis 3. oxygen for respiration 4. carbon dioxide for the production of sugars

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Bird watchers at Hawk Mountain Sanctuary in Pennsylvania recorded the number of hawks observed during four days in August. Which conclusion can best be made from the data? 1. The greatest number of hawks was observed on day 4. 2. Broad-winged hawks fly faster than other types of hawks. 3. More red-tailed hawks were observed than sharp-shinned hawks. 4. Migrating hawks prefer Hawk Mountain Sanctuary over the bird sanctuaries.

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The presence of which structure helps classify an organism as eukaryotic? 1. nucleus 2. cell wall 3. flagellum 4. chromosome

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A student wants to compare how long a flashlight will continue to shine using different brands of batteries. How can the student make sure that the test is fair? 1.Test the same brand of batteries in two flashlights. 2. Test each brand of batteries in the same flashlight. 3. Test different sizes of batteries in the same flashlight. 4. Test whether some flashlights can work with only one battery.

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How much did the plant grow in height from day 4 to day 6? 1. 1.0 2. 2.5 3. 4.0 4. 6.5

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In the lab activity Making Connections, an experiment was designed to test the effect of exercise on the ability to squeeze a clothespin. The number of times the clothespin was squeezed served as the 1. independent variable 2.dependent variable 3.hypothesis 4.control

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Some viruses attack cells by attaching to their outer covering, entering, and taking over their genetic "machinery." Viruses are able to invade cells after first attaching to their 1. nuclear membrane 2.cell membrane 3.genetic machinery 4.viral proteins

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A group of students studied four different cell specimens under a microscope and recorded information about each cell in this table. Which cell specimen is a prokaryote? 1. Cell 1 2.Cell 2 3.Cell 3 4.Cell 4

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A student makes a list of some objects in a class. Which characteristics is the same among all of the objects? 1. mass 2. volume 3. state of matter 4. ability to conduct heat

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In which cell structure is energy extracted from nutrients? 1. chloroplast 2. ribosome 3. mitochondrion 4. vacuole

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Protein synthesis is accomplished primarily by the interaction of which two cell structures? 1. vacuoles and mitochondria 2.ribosomes and vacuoles 3.nuclei and ribosomes 4.nuclei and mitochondria

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Which information was most essential in preparing to carry out this scientific investigation? 1. a knowledge of the variety of mutations found in American alligator populations 2. the arrangement of the DNA bases found in the TRPV4 protein 3. the effects of temperature on the incubation of alligator eggs 4. a knowledge of previous cloning experiments conducted on alligators and other reptiles

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Which piece of information is an opinion? 1. Rachel Carson was born in 1907. 2. She went to school in Pennsylvania 3. She is the author of the most important book about the environment ever written. 4. Rachel Carson was 11 years old when her first story appeared in a magazine.

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Which statement best describes van Leeuwenhoek's work? 1. His observations alone provided enough information to form modern biological theories. 2. The microscopes he made were used by all scientists and have remained unchanged over the years. 3. Knowledge gained by his work has led to the improvement and development of modern scientific concepts. 4. Explanations of the microscopic world today are solely based on his observations and conclusions.

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Which structural feature of the cell membrane allows molecules such as oxygen and carbon dioxide to diffuse into and out of the cell? 1. The cell membrane contains protein molecules. 2. The cell membrane contains cholesterol molecules. 3. The cell membrane is made up of two layers of phospholipids. 4. The cell membrane is anchored to the cytoplasm by the cytoskeleton.

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Which type of information can a student collect using the tool in the drawing? 1. mass of a solid 2. height of a solid 3. volume of a liquid 4. temperature of a liquid

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An ameba is a single-celled organism. It uses its cell membrane to obtain food from its environment, digests the food with the help of organelles called lysosomes, and uses other organelles to process the digested food. From this, we can best infer that 1. all single-celled organisms have lysosomes to digest food 2. amebas are capable of digesting any type of food molecule 3. single-celled organisms are as complex as multicellular organisms 4. structures in amebas have functions similar to organs in multicellular organisms

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If 10 grams of water are added to 5 grams of salt, how much salt water will be made? 1. 2 grams 2. 5 grams 3. 10 grams 4. 15 grams

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Students are studying how fast a prairie dog can travel from hole 1 to hole 2. Which data should the students observe and record? 1. size or depth of the holes 2. size and depth of the holes 3. time or distance traveled between the holes 4. time and distance traveled between the holes

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