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1. At the beginning of the spring, Dr. Peter Erlenmeyer notices that there is an equal distribution of long and short stemmed dandelions in the vacant lot across the street from his house as well as in his own backward. By the end of the summer he notes that there are mostly long stemmed dandelions in the lot, but mostly short stemmed dandelions in his yard. These observations are examples of what biological principle? Develop a hypothesis to explain Dr. Erlenmeyer's observations.
2. You have discovered a new substance that you suspect may be a living organism. What characteristics would this substance need to have in order to be classified as living?
3. Explain how the information stored in DNA is the key to the expression of traits.
Explain the role of chemicals as messengers in regulating the body homeostasis.
explain how an action potential, originating at the axon hillock, is propagated along myelinated and nonmyelinated axons.How are graded potentials made
A cell with a 5 percent concentration of salt in it is placed in a solution with a 15 percent concentration of salt. Imagine that the cell is permeable to water but not to salt.
In this case, we are tracking an enzyme secreted by pancreatic cells. What is its most possible pathway. Find out how many calories you will have saved by eating this reduced-fat product instead of the high-fat one.
lex A is an E. coli gene whose product regulates the transcription of certain target genes that are located at different positions in the bacterial chromosome.
An experienced goldfish breeder receives two unusual male goldfish. One is black rather than gold and other has a single fail fin rather than a split tail fin.
A black guinea pig crossed with an albino guinea pig produce 12 black offspring. While the albino was crossed with a second black animal, 6 blacks and 6 albinos were obtained. What is the best justification for this genetic situation.
Discuss the main mechanism involved in auxin’s ability to stimulate cell elongation? Identify another important plant response that employs the same mechanism.
As a result of single intake of 6.3x10^3 Bq of a radionuclide, a particular organ will receive doses of the 0.2 mGy from a low energy beta particles and 0.05 mGy from the alpha particles during next 50 y.
Illustrate what is meant by motivation. What types of non-financial reward might a company employ to motivate employees.
The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic of all of these extracellular structures.
Assume your lab partner leaves in the middle of making a 50mM NaCl solution. You know that they transferred 6mls of a 250mM stock solution into a beaker,
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