- SEPARATE ANSWER SHEET PROVIDED 1. Which of these best describes what science is? A. a body of knowledge C. a way of looking at & thinking about the natural world B. a way of doing experiments D. a series of ideas 2. Publishing reports of biological investigations in scientific journals is important because: A. it allows biologists all over the world to understand your reports B. it allows biologists all over the world to repeat your investigations C. it allows biologists all over the world to challenge your results D. all of the above 3. When a biologist centrifuges a suspension, the solids are separated from the liquid in the following way: A. The solids float to the top because they are lighter. B. The solids are pulled to the bottom because they are heavier. C. The solids are pulled to the bottom because they spin faster than the liquids. D. The solids float to the top because they spin slower than the liquids. 4. Bacteria are usually cultured in: A. test tubes B.beakers C. Petri dishes D. none of these 5. Which tool of the biologist is more frequently used to study cell structure in the laboratory? A. Dissecting kit B.Centrifuge C. petri-dish D.Microscope 6. Chaltu grows the same bacteria in 20 petri-dishes. She places 10 of the dishes in a container with a normal atmosphere. The remaining dishes she places in a container in which the oxygen level is double the normal level. She labels the first group 'A' and the second group 'B' Which statement best describes he groups? A. Group A is the controlled group; group B is experimental group B. Group A is the experimental group; group B is group controlled C. Group A is the hypothesis; group B is the theory D. Group A is the theoretical group; group B is the hypothetical group E. Group A is the variable; Ogroup B is te observation 7. An educated guess to explain a phenomenon is a(n) A. Experiment B.hypothesis C. Science D. radiation 8. The steps used by scientists to solve problems and uncover facts is the A. testing method B system method C. scientific methods D. question method 9. scientific inquiry begins with A. A problem to solve or a question to answer C.laboratory test B. Observation D. A checklist of procedures 10.Which of the following is true about antiretroviral drugs currently used to treat AIDS patients? A. To cure AIDS C. They serve as HIV vaccines B. They stop HIV transmission D. They slow down HIV multiplication 11.Which of the following is true about gram positive and gram negative bacteria cell wall structure A. Gram positive bacteria cell wall contain lipopolysaccharides B. Gram negative bacteria contain thick peptidoglycon layer C. Gram negative bacterial cell wall have narrow periplasmic space D. Crom noodles beatenin I call well aontoin teaher d and linetaahaia aaid
- Aquatic Ecosystems Vocabulary Word Bank & Answer Choices Word Bank: 1. Phytoplankton 2. Zooplankton 3. Benthos 4. Decomposers 5.Nekton 6. Emergent vegetation 7. Freshwater lakes 8. Oligotrophic lakes 9. Eutrophic lakes 10. Photosynthesis 11. Brackish water 12. Photic zone 13. Aphotic zone 14. Marsh 15. Bog Matching Vocabulary with Definitions: Match each term with the correct definition. A. Floating, plant-like organisms that perform photosynthesis and serve as the base of aquatic food chains. B. Organisms that live at the bottom of aquatic ecosystems, such as sea stars and crabs. C. Free-floating or weakly swimming animal-like organisms, such as protozoa and jellyfish. D. An area in a wetland that does not support tree growth and is dominated by grasses and shrubs. E. A deep-water zone in aquatic environments where no sunlight reaches. F. The maximum environmental condition that restricts the growth, abundance, or distribution of an organism. G. The role an organism plays in an ecosystem, including its habitat and interactions with other organisms. H. Organisms that break down dead matter and recycle nutrients back into the ecosystem. 1. The process by which plants and some microorganisms use sunlight to convert carbon dioxide and water into energy. J. The upper layer of water in an aquatic ecosystem where sunlight penetrates, allowing photosynthesis, K. Strong-swimming aquatic organisms such as fish whales, and turtles. L. Aquatic plants that are rooted to the bottom but extend above the water's surface. M. A mix of fresh and saltwater, often found in estuaries where rivers meet the ocean. N. A freshwater lake with low nutrient levels,clear water, and limited plankton populations. O. A type of wetland with floating plant matter, often covered with sphagnum moss, where decomposition occurs very slowly. P. A freshwater lake with high nutrient levels, often resulting in large amounts of algae growth. Q. A body of standing freshwater, which can range from small ponds to large lakes.
- __ 2. The most important factor in the popping process is: a. the pericarp b. the type of popping process C. the molsture in the seed d. none of the above __ 3. At what temperature does the pericarp rupture (approximately)? a. 90C b. 100C C. 175C d. 300C __ 4. The pericarp of popcorn is __ than normal field corn. a. Stronger b. Weaker C. Exactly the same d.Thinner __ 5. The popping (expansion) takes place primarily in the __ endosperm. a Opaque b. Translucent C. Protein d. none of the above __ 6. Popcorn is usually harvested at underline ( )% % moisture. a. 5-10 b. 13-14.5 C. 16-19 d. 20-25 __ 7. The state that leads the nation in popcorn production is: a. Oklahoma b. Illinois C. California d. Nebraska Part Four: Short Answer Instructions: Provide information to answer the following statement. Explain the process of how a popcorn seed pops.
- 2. What conditions lead to algae blooms? (highlight all that apply) a) Excess nutrients (like nitrogen and phosphorus) b) Clean, fast-moving water c) Warm temperatures d) Sunlight exposure e) Overfishing 3. What is a harmful algat bloom (HAB), and how is it different from a normal algae bloom? 4. What are two main nutrients that cause algae blooms when they enter water bodies? 5. Name three sources that can lead to excess nutrients in waterways. 6. How do algae blooms harm aquatic plants? 7. What is hypoxia, and how does it affect fish and aquatic animals?
- Instructions: Match the term with the correct response. a. Endosperm d.Embryo g. Vaporize b.Opaque e Pericarp c. Zea mays everta f. Translucent __ 1. A physical change from a liquid to a gas. __ 2. The hard outer covering of the seed. __ 3. The type of endosperm that expands. __ 4. The food storage structure in a seed. __ 5. The type of endosperm found in greater quantities in field corn. __ 6. The structure that will grow into a new plant. __ 7. The scientific name for popcorn. Part Two: Completion Instructions: Provide the word or words to complete the following statements. 1. When heated, the pressure inside a popcorn seed is __ times greater than normal atmospheric pressure. 2. To maintain moisture content popcorn should be stored in an __ container. 3. Most of the world's popcorn is grown in the __ Part Three: Multiple Choice Instructions: Circle the letter of the correct answer. __ 1. Popcorn is about three fourths __ a.Protein b. Carbohydrate c. Water d. Air
