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1. A girl notices that her guppies reproduces most when herfish tank water is slighty alkaline. they stop reproducing if thewater becomes acidic or if the water becomes too alkaline. this isan exampleof:
a) secondary sucessionb) zone of tolerance and intolerancec) communitiesd) intertidal zones
2. when ling increased the amount of food, the carryingcapacity of the aquarium:
a) increaasedb) decreasedc) remained the samed) increaesd ,then decreased3. the graph s a popullation in time that grows until itreaches its carrying capacity usually haas the shape of a(n)
a) Ib) Jc) Sd) M
In the fungus Neurospora, the td+ allele is needed for the cells to build the amino acid tryptophan. The mutant allele td results in an inability of the fungus to make its own trp,
Which chemical modification do we associate with changing the activity of an enzyme in a transient/non-permanent manner?
Why scientific method is used in medicine? What characteristic or property of experimental design is the most crucial for medical research?
q. hershey and chase experimented with radioactively-labeled phosphorus and sulfur to find out that dna not protein is
Select two hormones, Describe how each of these hormones contributes to homeostasis. Especially interesting are hormones that are antagonists relative to specific functions of the body.
In cattle, coats may be solid white, solid black, or white and black spotted. When true breeding solid whites are crossed to true-breeding solid blacks, the F1 generation consists of all spotted individuals.
If our goal was to measure the Absorbance of DCPIP (blue substance), why did we set the spectrophotometer to measure Absorbance at ~620nm, the orange part of the visible spectrum?
How much ATP can be produced from one molecule of butterfat containing one molecule of glycerol and the following fatty acids: first fatty acid: 12 carbons, second fatty acid 6 carbons
Compare them to observed numbers using a chi-square test of observed and expected values(note in this case degree of freedom are 1 not 2 because you are computing the three genotype frequencies from p and q.What is the value of chi square?
Total magnification of a miscrosope is determined by adding the eyepiece-lens magnification to the objective-lens magnification?
Explain why would we evolve so that when we are stressed our immune system is suppressed? Discuss how would this increase survival? What is the adaptive value of reflexes?
The molecules of all matter, particularly gases and liquids, are in constant vibration motion. As a result of this motion, molecules are continually colliding with one another, much like balls scattering over a pool table.how to Add a coverslip ov..
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