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An average count of 42 cells/mm2 grid is counted in a hemacytometer for a 2.5 ml suspension of cells. (Show your calculations!) a. What is the cell concentration of the suspension? b. Approximately how many cells are in the entire sample? c. To perform an experiment, 8 dishes of cells with 1.2 x 105 cells per dish are needed. How many ml of the suspension will be needed for the experiment? Are there enough cells? d. How many cells would have to be actually added to a plate (this is usually called "seeded") to begin a culture with 3.5 x 105 cells/dish, if the line of cells is known to have a plating efficiency of 65%? (Show your calculations!)
So we have Algae, Fungi, Lichens, Mosses, Ferns, Gymnosperms, Angiosperms (monocot) and Angiosperms (dicot).
Bacterial and eukaryotic chromosomes are very compact. Discuss the advantages and disadvantages of having a compact structure.
Vasoconstriction
q1. nasa hopes they might one day be useful in producing some electricity on a spacecraft. what mode of nutrition do
Describe how you understand chemical and electrical gradients. Give examples from the body.
What are the causes and effect of the disease malaria?
What is the advantage of hermaphroditicorganisms? Where is the feeding tube located? Why is this unusual forbilaterally symmetrical organisms?
A scientist is studying a species of gopher found in North America. Population X lives in an area with hard packed soil, Population Y lives in an area with loose soil, and Population Z lives in an area with both hard and loose soil.
What fraction of demes in each set is likely to become fixed for allele A1 versus A2. Explain the differences in head movement available to fish.
1. Explain how a decrease in pH and oxygen levels in the blood and interstitial fluid affects the heart, blood vessels, hemoglobin dissociation curve, and the respiratory system.
The energies of glycolysis shows that there is a large drop in free energy upon oxidation of glycerladehydes 3-phosphate to 1,3-bisphosphoglycerate. In the presence of oxygen, some of this energy is ultimately converted into ATP production. though..
What are the unique ecological contraints that limit/encourage asexual versus sexual reproduction in multi cellular plants versus multi cellular animals.
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