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What are the forces that facilitate to make water to flow within the xylem from the roots to the leaves?
Water enters the roots because of the root pressure and a water column is maintained within the xylem from the roots to the leaves. The most significant factor that makes water ascend is transpiration, mainly in the leaves. As the leaves lose water by transpiration their cells tend to attract more water creating suction inside the xylem and the cohesion property of water that keeps its molecules bound (one pulls the other) by hydrogen bonds helps the process.
The movement of the chromosome is called anaphase A, and the extension of the poles is termed anaphase B.The mechanism of these movements are discussed below. Chromosome move
do you think the social and cultural environment of the 18th and 19th centuries helped or hindered the study of microbiology in particular and science in general
Comparing to cyclostomes (primitive vertebrates) what are the main novelties presented by fishes? Compared to cyclostomes, evolutionary novelties shown by fishes are: pectoral
In eukaryotes the SER has enzymes able to begin double bonds into fatty acyl CoA molecules in an oxidation reaction which uses molecular oxygen. This reaction is catalyzed
This means the non-market value of natural products such as firewood, game and fodder that do not pass through a market or product preparation. Indigenous people in developing cou
What is polyembryony? Polyembryony is the phenomenon in which a single embryo in its initial embryonic stage separates itself forming many new individuals of the similar sex an
Define Role of Glucocorticoids in controlling gene expression? Glucocorticoids are another class of hormones involved in the regulation of lipogenic enzymes, but their role in
Benefits of Computerization Computerization were the following benefits in nursing: Improved professional care Better accuracy (by decreasing human error) Effect
Mountains and their forest ecosystems are regarded as the water towers of the world. A good example is the extraordinarily massive Himalayan Mountains which have shaped the climate
Which of the following statements is correct? A. Hemoglobin binds O2 more tightly at pH 7.2 than at pH 7.4. B. Fetal hemoglobin under physiological conditions binds O2 more t
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