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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.
Define Reagents for Preparation of Phosphate Buffers? Buffer solutions of pH4, pH7 and pH 9.18 phosphate buffer solution: 0.1 M disodium hydrogen phosphate or Na 2 HPO 4
Is there a difference between something that is alive and something that is a living organism?
Dextran Dextran is a high molecular weight polysaccharide having α1→ 6, α1→ 3 linked glucans. It is produced by the bacterial fermentation of sucrose by Leuconostoc dextran
Effects on Materials - Air pollutants Most air pollutants are reactive chemicals, so they react with most of the substances around. You may recall from your chemistry lessons
1. A man with normal pigment, whose father was an albino, marries an albino. What chance is there that their first child will be an albino? 2. A man with normal pigment marries
History of evolution? Evolution is usually defined as "change over time." In spite of the incredible diversity of life found on Earth, many fundamental characteristics are shar
Q. What is genetic engineering? Genetic engineering, It is also known as molecular cloning or gene cloning, is artificial recombination of nucleic acid molecules in a test tube
Types of Community On the basis of size and degree of relative independence communities may be divided into two types: i) Major Community: These are large-sized, well org
Among neonates, IE typically involves the tricuspid valve of structurally normal hearts and is associated with very high mortality rates. It is likely that many of these episodes
Pullulan Pullulan is a water soluble edible microbial polysaccharide consisting of Maltotriose units (α 1 → 6), as shown in the figure 2.12. It is produced by yeast Aureobasi
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