By Warren D Dolphin
This lab handbook is for a one or two-semester majors point normal biology lab and will be used with any majors-level basic biology textbook. The labs are investigative and ask scholars to exploit extra severe pondering and hands-on studying. the writer emphasizes investigative, quantitative, and comparative techniques to learning the lifestyles sciences.
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Extra info for Biological Investigations: Form, Function, Diversity and Process
Do not ingest. In each case, mix one drop of the culture fluid containing paramecia with one drop of the desired solution. Counts can easily be made at the magnification provided by a 10× objective and 10× ocular once the vesicles and their pulsations have been observed. Would you predict that the pulsations per minute in distilled water would be higher or lower than the number when in culture medium? 3. Review your hypotheses and make a decision to accept or reject your null hypothesis. Formulate a new set of testable hypotheses that relates expected vacuole pulsation rate in 3% NaCl to that seen in normal culture media.
It precipitates in the tube. Measure the distance each gas traveled in the tube. C A U T I O N The HCl is a concentrated acid and can harm you and your clothes. The NH4OH is very irritating to the eyes and nose. For these reasons, your instructor may choose to do this part of the exercise as a demonstration. 36 Determining How Materials Enter Cells 4-6 Dolphin: Biological Investigations: Form, Function, Diversity & Process, 6/e 4. Determining How Materials Enter Cells Text Record the results of your experiment below.
Write these questions in the space below or in the margins of the pages of this lab topic. The lab experiments should help you answer these questions, or you can ask your instructor for help during the lab. 02 mg/ml) Bromophenol blue solution for unknown Prelab Preparation Before doing this lab, you should read the introduction and sections of the lab topic that have been scheduled by the instructor. You should use your textbook to review the definitions of the following terms: Absorbance Balance Gram Histogram Mean Micropipet Milliliter Spectrophotometer Standard deviation Variance You should be able to describe in your own words the following concepts: Beer’s law Absorption spectrum Standard curve Review Appendix C, pages 437–443 As a result of this review, you most likely have questions about terms, concepts, or how you will do 5-1 Objectives 1.
Biological Investigations: Form, Function, Diversity and Process by Warren D Dolphin