Biology Semester 1 Exam Review Answer Key

Biology Semester 1 Exam Review Answer Key - 1 2 3...

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Biology Semester 1 Study Guide The following Gizmos meet the standards assessed by the Biology EOC and should be  reviewed during the first semester: 1.  Rabbit Population by Season Gizmo 2.  Food Chain Gizmo 3.  Photosynthesis Lab Gizmo Vocabulary to Review: Trophic Level Primary Succession Prokaryote Primary Consumer Secondary Succession Eukaryote Secondary Consumer Transpiration Cell Organelles Producer Stomata Hypotonic and Hypertonic Limiting factor Xylem and Phloem Passive and Active Transport Energy pyramid Capillary Action Chromosome Carrying capacity Cohesion and Adhesion Mitosis and Meiosis Carbon cycle Aerobic Respiration Cancer Water cycle Anaerobic Respiration Sister chromatids Nitrogen cycle ATP Crossing over Acid rain Cell Theory Mutation Codon mRNA and tRNA Questions to Ponder: 1.  When you remove an organism from a food web or add an organism to a food  web, what are some consequences that can occur? There would be far-reaching effects.  If a producer is removed, since producers can  capture sunlight directly, then less energy will be captured from the sun and the  organisms that eat that producer may die.  If a secondary or tertiary consumer is  removed from a habitat, the primary consumers would overpopulate.   
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2.  Can a population of organisms grow exponentially forever?  Why or why not?   Give an example. No, because eventually a limiting factor would cause the population to stabilize.  An  example of a limiting factor that would limit the size of a population is the amount of food available.  Other examples could be amount of land, number of predators,  competition….. 3.  Explain this energy pyramid.   At each tropic level in a food chain, energy is used by the organisms at that level to  maintain their own life processes. Because of the 2nd law of energy, some energy is  lost to the surroundings as heat. It is estimated that in going from one tropic level to the  next, about 90 % of the energy is lost.  In moving to the next tropic level, only 10 % of  the original energy is available. By the third tropic level only 1% of the energy is  available. 4.  Matter cycles and energy flows in one direction.  Explain this statement. Matter must be recycled because there is no new matter created; therefore, carbon,  nitrogen, and water must be recycled so that they can be reused.  Energy comes from  the sun and flows in one direction, changing form.  However, each time energy changes from one form to another (ex. Chemical to mechanical) some of it is transferred as heat.
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