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different types of leaves and their names

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Question:what advantage is it to a leaf to be broad and thin?what type of phyllotaxy or leaf arrangement occur in the plant kingdom?are all leaves fundamentally similar or homologous?explain?thanks for answering..i need this for our next activity in laboratory

Answers:Having broad leaves allows for a greater surface area for photosynthetic pigments to get light. This is typical of shade trees. Having a narrow leaf would allow sub-canopy species more light, so there might be a necessary associated plant. Leaves are simple, compound, pinnately compound, bi-pinnately compound, tri-pinnately compound, trifoliately compound, and palmately compound. They can be opposite, alternate or whorled. Leaf arrangement is one of the simplest ways to divide plants. Blame the Italian, Cesalpino for this complex naming...There are also many different fruit type arrangements, but you asked about leaf arrangement. Leaves vary greatly from species to species. Again, knowing a leaf type and leaf arrangement can help you understand what kind of niche the plant fills and how it feeds itself.

Question:Name 5 different types of rocks. Identify each as either metamorphic, sedimentary, or igneous, and why did you classify each rock the way you did.

Answers:KABAM! http://en.wikipedia.org/wiki/List_of_rock_types

Question:

Answers:Any of the organic compounds making up the genetic material of living cells. Nucleic acids direct the course of protein synthesis, thereby regulating all cell activities. Their transmission from one generation to the next is the basis of heredity. The two main types, DNA and RNA, are composed of similar materials but differ in structure and function. Both are long chains of repeating nucleotides. The sequence of purines and pyrimidines (bases)-adenine (A), guanine (G), cytosine (C), and either thymine (T; in DNA) or uracil (U; in RNA)-in the nucleotides, in groups of three (triplets, or codons), constitutes the genetic code.

Question:is the answer 1-solid to liquid 2-liquid to gas 3-gas to liquid 4-liquid to solid? im only at intermediate physics. my course is electrical services engineering year 2

Answers:This question could mean a lot of things depending on what level of physics you're at. There are a lot more than four possible transitions. Read the wiki and sea if that drawing near the top rings a bell for you: http://en.wikipedia.org/wiki/Phase_transition

From Youtube

Caring for Different Types of Orchids : Learn About Dendrobium Orchid Leaves :Understand Dendrobium Orchids' leaves and how they affect the plant'sgrowth. Learn more in this free educational video series. Expert: William Hutchinson Bio: Bill has been working with orchids since 1951 but is the first to admit that he is still learning. He graduated from Stockbridge School of Agriculture in Floriculture/Horticulture. Filmmaker: Christian Munoz-Donoso