Chapter 4 Microscopes Two important factors in microscopy are: 1) Magnification: an increase in the object’s apparent size compared with its actual size. 2) Resolving Power: the ability of an optical instrument to show two objects are separate. Three types of microscopes: 1) Light Microscope (LM) M: 1000x RP 0‚2 micrometer (small bacterial cell) 2) Electron Microscope (EM) uses a beam of electrons to resolve electrons‚ better resolving powers than light microscope M:100‚000x RP 0
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Chapter 2 Terms Matter - anything that takes up space and has mass. Element - substance that cannot be broken down to other substances by chemical reactions. Compound - substance consisting of two or more different elements combined in a fixed ratio. Essential Element - the 20-25% of the 92 natural elements an organism needs to live a health life and reproduce. Trace Elements - required by an organism only minute quantities. Atom - the smallest unit of matter that still retains the properties
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the rope? What work is done by friction? What is the resultant work? What is the coefficient of friction between the toolbox and the floor? [983 J‚ -600 J‚ 383 J‚ 0.472] 4. A box of mass 5.0 kg is accelerated by a force across a floor at a rate of 2.0 m/s2 for 7.0 s. Find the net work done on the box. [490 J] 5. A 200 g mass wooden block was placed on an inclined plane and the angle of the incline was slowly increased until the block begins to slide. (a) If the coefficient of static
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Name______________________________ Class __________________ Date ______________ Chapter 4 Ecosystems and Communities Section 4–1 The Role of Climate (pages 87–89) This section explains how the greenhouse effect maintains the biosphere’s temperature range. It also describes Earth’s three main climate zones. What Is Climate? (page 87) 1. How is weather different from climate? Weather is the day-to-day condition of Earth’s atmosphere at a particular time and place
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Chapter 11: Cell Communication Concept 11.1 External signals are converted to responses within the cell. I. Evolution of Cell Signaling 1. signal transduction pathway. a specific cellular response in a series of steps 2. signaling mechanisms first evolved in ancient prokaryotes and unicellular eukaryotes‚ then adopted for new uses 3. quorum sensing. allows bacterial populations to coordinate behaviors to carry out activities only productive when performed by a given number of cells
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Biology SL – Chapter 4 questions Page 57 1. a) Difference between protein and polypeptide: Proteins have a structure formed by one or more polypeptide chains whilst a polypeptide is a chain of amino acids. b) Fat and oil differences: They are both lipids‚ but fats are solid whilst oil are liquids. c) Difference between starch and glycogen: Starch is a polysaccharide found in plant tissue whilst glycogen has polysaccharide found in animals. d) Condensation and hydrolysis:
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Labs 4 & 5 Lab Four: Experiment 1 1. At what magnification do you first notice the ragweed pollen? I first noticed it when the magnification is at about 30 2. Which is bigger‚ rhinovirus or E. Coli? E. Coli is bigger 3. Based on the magnification‚ how many of the E. Coli can fit into the same space as the head of a pin? 10‚000 E. Coli 4. About how many red blood cells could fit across the diameter of a human hair. (Again‚ look at the magnification scale)? About 100 blood cells
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Bio Study Guide EXAM 1 Chapter 1 Characteristics of living things (know the 7 characteristics) 1. Order 2. Regulation- controlling body temp 3. Contain DNA- evolution 4. Energy Processing – food 5. Response to the environment- adapting 6. Growth and development 7. Reproduction Classification of organisms (D.K.P.C.O.F.G.S) Domain‚ Kingdom‚ Phylum‚ Class‚ Order‚ Family‚ Genus‚ Species Prokaryotes vs. Eukaryotes (know differences) Prokaryotic cells: DO NOT have a nucleus but DOES
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Biology form 4 – Chapter 5 Mitosis Mitosis is a division of the nucleus to produce two new daughter cells containing chromosomes identical to the parent cell. Significance of mitosis Growth- allows a zygote to produce more cell in order to grow Repair and replacement- allow the multicellular organism maintain its tissues‚ example skin cells and blood Asexual reproduction- clone The cell cycle divided into two major phases a. Interphase b. Mitosis Interphase is the period between division‚ divided
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1/24/14 Group theory Chapter 4 & 5 Quiz 1. The willingness to risk benefical or harmful consequences a) Acceptance b) Resolution c) *Openness* d) Influence 2. Define acceptance a) Being trusting and trustworthy b) *The expectation that you are going to behave cooperatively* c) Highly cohesive groups are characterized d) Members of a group to motivate them to work 3. When all slots are open‚ every group member can communicate directly with every other member. a) *Communication
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