Biology Pre-Assessment

9th Grade Biology Pre-Assessment: Cover ecosystems, cells, genetics & more!

Name: (First and last) 1. Humans have an effect on ecosystems when they use native grasslands or forested areas for farming or urban use. One negativeeffect of these changes on the ecosystem is that there will be less biodiversity more homes successful economic growth increased food production 2. Which statements best describes an important process carried out by structure X? Milk passes from the mother to the fetus Materials are exchanged between fetal and maternal blood Maternal blood is converted into fetal blood Oxygen diffuses from fetal blood to maternal blood The diagram below represents a marine food web.3. The organisms represented by X are decomposers carnivores producers scavengers 4. The process of diffusion and active transport are both used to break down molecules to release energy move molecules into or out of cells of the body bring molecules into cells when they are more concentrated outside of the cell move molecules against a concentration gradient, using ATP molecules 5. Botulinum toxin is a substance that can cause paralysis in humans. The effects of the toxin are due to the blocking of a signaling molecule that is necessary for communication between nerve cells. The toxin most likely interferes with the normal functioning of a chromosome DNA molecule receptor digestive hormone 6. Before they can pass from a parent cell to its offspring cells, the inherited instructions that a human cell carries must first be moved into the nucleus broken down and made into DNA molecules used to make specific protein molecules that form genes accurately replicated 7. Eye color, hair color, and skin color often vary from person to person and even within a family. One explanation is that the glucose units in a DNA molecule are often rearranged the genetic material of the female parent has the most influence on offspring the inherited traits of individuals are determined by different gene combinations some extra parts of genetic material are often gained during fetilization 8. Although all of the cells of a plant contain the same genetic material, root cells and leaf cells are not identical because they use different genetic bases for the synthesis of DNA use different parts of their genetic instructions select different cells to express delete different sections of their enzymes 9. During cellular respiration, what is the direct source of the energy used in the cells of consumers in the ecosystem represented below? the Sun enzymes the atoms making up inorganic molecules the chemical bonds in organic molecules 10. The chart below shows the number of differences in genetic material between individuals within the same species. Scientists can use this information to determine which populations demonstrate the greatest amount of genetic diversity.According to the chart, which two species would be more likely to survive if their environmental conditions changed? Tasmanian tiger and Tasmanian devil brown bear and whale Tasmanian tiger and wolf panda and wolf 11. A student wondered if butterflies would show any differences in their wing color if, as caterpillars, they were grown in the dark or grown in bright white light. Which statement would be a possible hypothesis for an experiment to test this idea? Caterpillars exposed to bright white light will show more blue and green in their wings when they become butterflies than caterpillars kept in the dark Will caterpillars kept in the dark have brighter wings when they become butterflies than caterpillars exposed to bright white light? Ten caterpillars will be kept in the dark and ten caterpillars will be exposed to bright white light and allowed to develop into butterflies. Results show that caterpillars kept in the dark and those exposed to bright white light had the same wing color when they became butterflies. 12. Base your answer to the following question on the diagram below and on the diagram below and on your knowledge of biology. The diagram represents some of the systems that make up the human body.Which row in the chart below correctly identifies the main function of these systems? 1 2 3 4 Base your answer to the following question on the information, diagram, and data table below and your knowledge of biology The laboratory setup represented below was used to investigate the effect of light on aquatic plants. Equal amounts of a green water plant were placed in beakers with gas-collecting tubes. The beakers were placed in a temperature-controlled environment. The light source was placed at different distances from the beakers. After an hour, the amount of gas collected from the plants in each tube was measured and recorded in the data table.Using the information given, construct a line graph on the grid following the directions below13. Provide an appropriate label for the y-axis, including units, on the line provided.14. Mark an appropriate scale, without any breaks in the data, on each labeled axis.15. Plot the data on the grid, connect the points, and surround each point with a small circle(Use the text and drawing tools available to label and draw the graph. To erase click on the hand icon and scroll over the segment you wish to erase and click on it.) Pencil and paint brush are available for drawing. Text box is available for labels. You may have to type some labels. 16. Which row in the chart below correctly identifies the variables in this experiment? 1 2 3 4 17. Identify the gas being produced by the plants. 18. Several students were diagnosed with strep throat. They were all given the same antibiotic and took it for the time specified. Three weeks later, after finishing all their antibiotic, all the students except one no longer had strep throat. State one likely reason why the one student was still infected with strep bacteria. Base your answer to the following question on the diagram below and on your knowledge of biology. Thediagram represents the energy in kilocalories (kcal) available at different feeding levels in a food chain. 19. Complete the energy pyramid below by writing herbivore, plant, and carnivore in the correct locations. Click on the blue dots to fill in a response Plant Herbivore Carnivore 20. Explain why there is a different amount of energy represented at each level of this energy pyramid.