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In the mid-seventeenth century, Dutch scientist Jan Baptista van Helmont struggled to understand where plants get the material that allows them to grow larger. He planted a willow tree of a given weight in a ?xed quantity of soil and then, ?ve years later, weighed both the willow and the soil. He found that the tree had gained 164 pounds during the period but that the soil had lost very little weight. His conclusion was that the willow's weight gain came solely from the water it absorbed through its roots. If you could be transported back to van Helmont's time, what would you tell him about the source of the willow's weight gain? Your response should be at least 200 words in length
Early formulations of this medium used a smaller amount of carbohydrate and occasionally prodused false alkaline result after 48 hours. Why do you think this happened.
In pea plants, purple flower color is dominant to white flower color. Consider a cross between one pea plant that is heterozygous and another pea plant that is homozygous recessive. What proportion of the offspring will have white flowers?
it is obvious that there are differences that exist between the health status of people in the u.s. and those in less
Explain by diagram and description the events that produced these fertile F2 hybrids. You must be specific and very clear about what is happening.
He was puzzled, combative, and he refuses to drink any water or any liquid. He lived on Oct. 7th, 1849. While said to the man's name, the student thought "Nevermore!" What was his diagnosis.
cellular respiration and photosynthesis form a critical cycle of energy and matter that supports the continued
In Drosopphila,sepia colored eyes are due to recessive allele s and wild type(red color) to its dominant allele ^s+. If sepia eyed females are crossed to pure wildtype males,what phenotypic and genotypic ratios are expected if the F2 males are bac..
Presently completed a small chart on comparison of potential deficits among nations given United States style of water consumption.
Antibiotics such as tetracycline, streptomycin, and chloramphenicol have a broad spectrum of activity against prokaryotic cells. Why do these antibiotics lack inhibitory activity against eukaryotic cells like fungi?
Explain how photosynthesis and respiration are linked in order to provide you with energy from the food you eat.
Government scientistscontinue to study the bodies of the aliens whose spacecraft crashedin Roswell, NM in 1947. Among other things, the scientists have investigated the structure of the genetic material isolated fromthe aliens' cells
The organism may well potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which structures would allow for the most certain identification of the organism.
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