IB Bio HL Sarah Maybury Sex and the Single Guppy – a investigation Research Question: How does the colour of a guppy affect the population size with 30 acra and 30 rivulus as predators over 8 generations of oberservation? Independent Variable: The colour of the guppy and the concentration of that colour in the river. Dependent Variable: The population of guppies left after 8 generations of being in the specific
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LAB 1 1. Describe the function of the following pieces of safety equipment and how each might be used: (10 points) a. Eye Wash (2 points) In the event of a chemical splash to the eyes‚ flood the eyes for at least 15-30 minutes with water. Flush from the eye outward. If you were not wearing proper eye wear‚ a chemical could splash into your eye and would make it necessary to use this. b. Fire Blanket (2 points) Used in order to put out a small fire. If a small area of the lab caught
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Lab Report Microscopic Study: Investigating Osmosis in Red Blood Cells Lab Report Investigating Osmosis in Red Blood Cells Introduction: The flow of water across a permeable membrane is called osmosis‚ and during this process‚ water moves down its concentration gradient. A solution surrounding a cell is hypertonic if it contains more solute particles than the inside of the cell‚ and the water will move out of the cell into the surrounding hypertonic solution by osmosis. If the solution
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spectrophotometer was used in the lab to determine these values. A spectrophotometer is an apparatus used to “measure the absorption of radiation in the visible and UV regions of the spectrum and allows precise at a particular wave length” (Jones et al.‚ 2007). The amount of light absorbed by a substance is directly in relation to the concentration of the solute and also the wavelength moving through the solute (Jones et al.‚ 2007). This is commonly referred to as Beer’s Law and can be expressed as A= εl [C]
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Organism Physiology: The Octopus Bio/101 The cephalopodor octopus is a marine organism that inhabits many diverse regions of the ocean. Its food source consists of crabs‚ small fish‚ clams‚ mussels and other marine animals. The octopus is a predatory animal and has developed many skills to aid in its survival in the environment it has adapted to. The octopus has several main organs that are vital to its survival; the brain for its intelligence; the ink sack for its defense; and the arms for
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General Biology I‚ Fall 2011 Lab Report 3 Name: Luan Nguyen Date: 11-30-11 Lab: Gel Electrophoresis Purpose of this lab: In this laboratory investigation‚ students will analyze hypothetical human DNA using restriction endonucleases and gel electrophoresis to match samples from a crime scene to a suspect. Introduction: Your analysis unit will use gel electrophoresis to determine the guilty party. Electrophoresis is a technology in science that allows an individual to separate
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to interpret natural experiences. Science is a searh for regularities. These regularities may include observed phenomena or patterns in nature. After observations have been recorded about regularities‚ scientist must process the information. Science is a self-correcting process in which previously existing concepts can be expanded‚ modified‚ or replaced if necessary. 2. Why is science considered a unified endeavor? A. Science is considered a unified endeavor because of the methods‚ reasoning‚ and
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chromosome // between homologous chromosomes. [3 marks] Diagram 1.2 shows the formation of an ovum. Oogonium (2n) Primary oocyte (2n) M M First polar body (n) Secondary oocyte (n) N N Second polar body (n) Diagram 1.2 (i) What are process M and N? M : Meiosis I N : meiosis II [2 marks] (ii) 2m Describe the process that occurs if a sperm present at process N. P1: meiosis II completed // ovum form P2: (nucleus) ovum is fertilized by sperm nucleus 2m P3 :
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(G)-Guanine c. (T)-Thymine d. (C)-Cytosine (Campbell‚ 2009). 3. What are the two base pairs? (2 points) a. AG b. CT 4. Answer the following questions: a. Define the term crossing over. (3 points) The phase in meiosis where chromosomes exchange segments of genetic materials (Campbell‚ 2009). b. Explain why crossing over is important in meiosis. (3 points) Crossing over is the way that genes receive genetic traits from both of the parents. 5. What are the two main differences between mitosis and meiosis?
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Review Questions 1. The organic molecule produced directly by photosynthesis is b) sugar 2. The photosynthetic process removes E) carbon dioxide from the environment. 3. The process of splitting water to release hydrogen and electrons occurs during the _____ process. a) light dependent 4. The process of fixing carbon dioxide into carbohydrates occurs in the ____ process. b) light independent. 5. Carbon dioxide enters the leaf through b) stomata. 6. The cellular transport process by which
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