Daphnia - Guides d'étude, Notes de cours & Résumés

In this experiment, caffeine was used to determine the increase in heartrate, when increasing the amount of concentration. Caffeine was used on a water flea known called daphnia, to see the outcome. The results show that an increase of caffeine concentration increases the heartrate of the daphnia. This was tested by the daphnia being observed underneath the microscope. This technique was shown to be an effective way of analysing the heartrate, this would mean that the same effect is also opposed...

In most stable freshwater environments, populations of Daphnia are almost entirely female and reproduce asexually. However, males are observed in low oxygen environments or when food is scarce. Based on these observations, a researcher suggests that male Daphnia develop in response to unfavorable environmental conditions. This is an example of a A result. B theory. C procedure. D hypothesis. - B theory Two students were testing the amount of fertilizer that would best promote the gr...

Unit 6 Assignment C and D- Investigative project . Coursework *GUIDANCE* . I also completed the daphnia required practical. Hope you find it useful! If you need anymore help you can message me :) Learning Aim C: Safely Undertake the project, collecting, analysing, and presenting the results Learning Aim D: Review the investigative project using correct scientific principles. IMPORTANT NOTICE FOR BUYERS! (Please note that I cannot take any responsibility for plagiarism, this is meant to be used a...

1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 - Answer Daphnia of same species Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes Then BPM counted using tally marks of a sheet of paper for 15 seconds, x4 to give BPM repeated with unknown conc. of caffeine (blind) 0.0% and distilled water, 0.1% and 0.5% Repeat with each daphnia and with other daphnia calculate mean 2. Investigate the vitamin C content of food ...

1. Which of these technologies is NOT used to determine the NOTEL (No Observed Transcriptional Effect Level)? a) Protein microarray b) qPCR (RT-PCR) c) SAGE d) cDNA microarray Ans: a) Protein microarray 2. You want a bioindicator to detect the presence of heavy metals in, and around a creek. You would naturally chose: a) a fish b) Daphnia c) a water plant d) It doesn't really matter, because all of the species above may indicate the presence of heavy metals through specific patt...

UCLA Anthro 1: Final Study Guide Questions With Verified Solutions Define theories, hypotheses, assumptions, data, & inferences. - ANS Theories: explains CAUSAL relationships at an ABSTRACT level Hypothesis: deduced from theory (more specific, 2 variables) assumptions: conclusion without evidence data: information of any type inference: conclusion from evidence Darwin's Postulates - ANS 1) Population is infinite, but resources are not 2) Population varies 3) Heritability (v...

Full write up for CPAC 1 Biology Edexcel new spec, passed core practical aspect of course

A fully write-up of OCR Biology A Practical 11: Investigation into the measurement of plant or animal responses. PAG 11.2 requires access to Daphnia and investigates how their heart rate changes with temperature. Includes: Introduction, Hypothesis, Equipment List, Variables, Method, Risk Assessment, Results Table and Bibliography. Some images included, such as that of Daphnia labelled and overall clearly organised.

Population - Answer - a group of individuals from the same species that occupy an area of space at the same time - can produce viable offspring - uses the same resources and are affected by similar factors Ecology - Answer - the study of how organisms interact with their environment What is population ecology? - Answer - measures changes in population size, pop composition - identifies factors that cause changes in population - studies how and why a population changes over tiime -IMP ...

I chose to investigate the different concentrations of caffeine on the heart rate because I wanted to see how it impacts the human heart when the concentration of caffeine is increased. Does the heartbeat stay consist, drop, or increase?  I hope to find out that with an increase of concentration given to the daphnia the rate of the heartbeat should also increase.