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The epidermis of a leaf is removed from a leaf and sections of the epidermis incubated in different concentrations of mannitol (asugar alcohol that does not enter plant cells). In .1M mannitol the epidermal cells neither gain nor lose weight. Sections of the epidermis placed in .6M mannitol become flaccid although although they do not change volume. From this information, calculate the original water potential, osmotic potential and pressure potential of the epidermal cells.
Cystic fibrosis is inherited with autosomal recessive allele individuals with autosomal dominant allele do not have the disease.
Reporter genes are often used to study how the transcription of a particular gene is controlled during fruit fly development. You are interested in a gene called brainless that you think is involved in neural cell development.
It is a very curcial concept to understand how the immune response is mounted against viruses, bacteria, protozoans and helminthes. For an effective immune response, both innate and adaptive immunity should work together.
Estimate which symptom is found in ADHD only but not found in ADD and the NOT a behavioral characteristic of ADDRT.
Describe how the hypothalamus controls secretion from the pituitary gland. Be specific regarding circulation and communication between the two regions.
Organisms on the planet Uglantis, that orbits distant star, have metabolism remarkably similar to that in organisms on Earth with a few exceptions.
compare and contrast the three types of species (rank) abundance curves. An explanation of what each one represents in terms of niche relationships among the species in a community is needed. Thanks
What further adaptations have gymnosperms made for life on land when compared with the ferns?
The onion plant began as a single cell. That cell had X number of chromosomes. (the exact number does not matter, we will just call that number X). How many chromosomes are in each of the cells that you observed? (give the answer in terms of X). H..
A 47 year old teacher goes to her physician complaining of dizziness, fainting, and shortness of breath. She appears pale and chronically ill. Her heart rate is 70/min supine and 68/min sitting and standing.
Assume you have a bacterial suspension and you need to dilute it to .0010 of the initial concentration so that you can determine thenumber of colonies per milliliter.
In a generalized transduction system using P1 phage, the done is pur+ nad + pdx- and the recipient is pur- nad- pdx+. The donor allele pur+ is initially selected after transduction.
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