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Functions of Synergids
Ultra structurally the structure and concentration of cell organelles reveals that synergids are metabolically active. The following Wee functions are attributed to synergids.
1. Directing of pollen tube growth by secreting some chemotropically active substances.
2. The degenerating synergids form the site for pollen tube discharge in the embryo sac.
3. The filiform apparatus may aid in the absorption and transportation of materials into the embryo sac from the nucellus.
How did Pasteur's experiment answer the objections raised by supporters of the "vital force" hypothesis? Pasteur's experiment allowed air from the out- side to mix with air fro
Ultrasonography: Ultrasounds are sound waves with a frequency of higher than the upper range of human hearing i.e., approximately 20,000 cycles per second (20 kilohertz).
The man-made sources of air pollution are broadly categorized into three: Point or stationary sources: it includes such sources which pollute at particular. Pollutants from
In the previous sub-section we discussed the possible ways by which variabiliti can, be generated. We shall now examine one instance that illustrates the consequence of variability
Explain Changing Body Composition with Ageing? With ageing, a progressive decline in the water content and the lean body mass is accompanied by an increasing proportion of body
What is Glycolysis in Cell Metabolism? Glycolysis : is the process that breaks down glucose into pyruvate and energy. Glycolysis does not require the presence of oxygen and
Explain Adverse Effects of Oseltamivir Nausea and vomiting can occur. Taking the drug with food decreases the incidence of nausea. In juvenile rats, very high doses of osel
Q. What is aquatic biodiversity? Biodiversity found on Earth today is the result of 3.5 billion years of evolution. Until the emergence of humans, the Earth supported more biod
disadvanatge of protozoa
In general compare and contrast the three functional classifications of joints according to movement.
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