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Loading and Unloading of Sieve Tubes
In order to understand the loading of food from manufacturing leaf cells to sieve tubes we must examine the anatomy of a minor vein shown in Figure. We can see
Figure: A cross-section of a minor leaf vein. (MC-Mesophyll Cell, XE -Xylem Elements, SE-Sieve Element, TC-Transfer Cells, PP-Phloem Parenchyma cell.
a xylem vessel (X), two sieve elements (SE) which are relatively smaller than other cells and without cytoplasm, the modified companion cells or transfer cells (TC) with dense cytoplasm and phloem parenchyma (PP) which is less dense and vacuolated.
Explain Food Sources of lron? lron is found in foods in one of the two forms i.e. haem or non-haem. In the human diet, the primary sources of haem iron are the haemoglobin and
Explain Balanus The realised niche of Balanus is the same as its fundamental niche Lower limits: as for fundamental niche. Upper limits: as for fundamental niche
Transport system in higher animals The circulatory system in higher animals has undergone several changes during evolution. The heart has become totally muscular. It p
Problem-solving essay. Maximum 800 words. Deadline 12th of March. Show me you understand what this essay requires
South Dakota and Oregon are at similar latitudes, and yet, on average, Oregon has warmer winters and cooler summers than South Dakota does. What property of water helps account for
Preventive Measure Primary prevention Early detection and treatment of group "A" b-hemolytic streptococcal pharyngitis. Penicillin is the commonly prescribed drug. Educ
Q. Determine the sucrose content in a sample of honey? This activity will help you to: • estimate the non-reducing sugars and total sugars in a sample of honey, • check t
It is IgG mediated cytotoxic hypersensitivity. Typical manifestations contain erythroblastosis fetalis, hemolytic anemia, blood transfusion reactions etc.
Phimosis Phimosis may be congenital or acquired. The foreskin in young infants cannot be retracted, because at that gge it is adherent to the underlying glans. Wlen an attemp
Question 1) What is megalobastic anemia? Discuss briefly its lab diagnosis. How would you differentiate megaloblastic anemia from other anemias? Question 2) What is hem
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