CORE PRACTICAL ONE Describe how the effect of caffeine on heart rate in Daphnia can be investigated practically‚ and discuss whether there are ethical issues in the use of invertebrates. Daphnia‚ the water flea‚ is a small freshwater crustacean which lacks physiological methods of maintaining a constant body temperature. This means that if the environmental temperature changes‚ its body temperature does so too and its metabolic rate will be expected to rise or fall accordingly. So the temperature
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Unit 3 Lecture Study Guide 1. List the 4 primary tissue types and give the general characteristics and functions of each one. 1) Epithelial: Covers the body‚ lines the cavities‚ tubes ducts and blood vessels‚ covers the organ inside the body cavity 2) Connective: most abundant& widely distributed‚ connect‚ bind and supports structures‚ insulates‚ and transports substances. 3) Muscle: associated with the bones of the skeleton‚ the heart and in the walls of the hollow organs
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environment. 4. The four organic macromolecule groups common to all living things are carbohydrates‚ proteins‚ nucleic acids‚ and fats. 5. All living things are composed of one or more cells. 6. Humans are unicellular creatures. 7. Mitosis is cell Xeroxing that occurs in prokaryotic cells. 8. Homeostasis is the process of maintaining a dynamic equilibrium of factors within which living things can exist. 9. Of the cellular metabolic processes‚ Glycolysis is the only one that
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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level .c rs om *0485738200* BIOLOGY Paper 2 Structured Questions AS Candidates answer on the Question Paper. Additional Materials: Electronic calculator Ruler (cm/mm) 9700/21 October/November 2009 1 hour 15 minutes READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name in the spaces provided at the top of this
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worked to hinder the mitotic cell division in the haploid gametophyte. II: Introduction C-Fern begins with a haploid spore known as the spore imbibition (Hickok‚ Warne 2009)‚ then after 3 to 4 days the spore will develop into a gametophyte via mitosis after germination. This is a photoautotrophic process. The gametophyte will then undergo differentiation (Hickok‚ Warne 2009)‚ to form the antheridium and the archegonium after 6 to 8 days (Hickok‚ Warne 2009). Following the gametophyte displaying
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Reproduction Male sperm fuses with female egg. If tdf (a gene) is present‚ then the embryo develops testes and produces testosterone. Female Reproductive system • Female baby develops if tdf is not present. • Tdf – a gene located on Y chromosome; if girl‚ then two X chromosomes‚ hence no Tdf. • Female hormones: progesterone and estrogen ( both secreted by mother’s ovaries and placenta which allow female genetilia to develop. Parts of the female reproductive system:
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Biology Test- Chapter 11: Introduction to Genetics Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination. 2. Offspring that result from crosses between true-breeding parents with different traits a. are true-breeding. b. make up the F2 generation. c. make up the parental generation. d. are called hybrids. 3. The chemical
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Physiology Linder Unit 1 Possible Essay Questions Chapter 1 1. Describe the concept of homeostasis. Explain how negative feedback and positive feedback loops effect the homeostatic condition. Use examples to explain your answer. Homeostasis can be described as maintaining a relatively internal environment even though the external environment is variable. Negative feedback loops effect the homeostatic condition by controlling it by bringing you back to your set point
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arrangements using several magnification techniques by way of 10x‚ 40x‚100x oil immersion lenses and a light source. The main purpose was to observe the shapes and arrangements of microbial bacteria and yogurt. Procedure The lab involved self-provided and labpaq materials to perform several exercises to obtain the purpose of the lab. The lab began with the proper identification of all components of the microscope and their functions. This allowed for preparation of the objective of being able to view specimens
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Amniocentesis essay Amniocentesis referred as amniotic fluid test (AFT)‚ is a medical processes used for pregnancy moreover in the early it used for diagnosis chromosomal and other fetal problems such as; Down syndrome‚ Trisomy 13/18‚ Fragile X‚ Rare-inherited metabolic disorders‚ Neural tube defects by alpha-fetoprotein levels. This technique is used full but more ever there are lots of risk however later on this technique get developing‚ it also can uses to detect problems such as; Infection
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