Daphnia of same species - Study guides, Class notes & Summaries

Biology Edexcel Practicals A Level Questions With Complete Solutions 1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 Daphnia of same species and volume Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min repeated with unknown conc. of caffeine (blind) 0.0% and distilled water, 0.1% and 0.5% Repeat with each daphnia and with othe...

Biology Edexcel Practicals A Level Questions With Complete Solutions 1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 Daphnia of same species and volume Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min repeated with unknown conc. of caffeine (blind) 0.0% and distilled water, 0.1% and 0.5% Repeat with each daphnia and with othe...

UCLA Anthro 1: Final Study Guide Define theories, hypotheses, assumptions, data, & inferences. - 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 - 1) Population is infinite, but resources are not 2) Population varies 3) Heritability (variation passed down) Ground Finches - Birds on Ga...

Which organelle, A to D, is not involved in the production and secretion of enzymes in eukaryotes? A Golgi apparatus B ribosomes C smooth endoplasmic reticulum D vesicle - CORRECT ANSWERS -C- smooth endoplasmic recticulum A student designed an investigation into the rate of transpiration in plants. They used eight leaves of the same size, age and species. They kept environmental conditions such as wind speed, temperature and humidity constant. Why did the student take readings from ei...