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One cell is responsible for drilling down through the integuments, and creating a conduit for the two sperm cells to flow down. The megagametophyte has just seven cells; of these, one fuses with a sperm cell, forming the nucleus of the egg itself, and another joins with the other sperm, and dedicates itself to forming a nutrient-rich endosperm ...
List of food origins. Some foods have always been common in every continent, such as many seafood and plants. Examples of these are honey, ants, mussels, crabs and coconuts. Nikolai Vavilov initially identified the centers of origin for eight crop plants, subdividing them further into twelve groups in 1935. [ 1]
The oat is a tall stout grass, a member of the family Poaceae; it can grow to a height of 1.8 metres (5.9 ft). The leaves are long, narrow, and pointed, and grow upwards; they can be some 15 to 40 centimetres (5.9 to 15.7 in) in length, and around 5 to 15 millimetres (0.20 to 0.59 in) in width.
Vanilla is a spice derived from orchids of the genus Vanilla, primarily obtained from pods of the flat-leaved vanilla ( V. planifolia ). [ 1 ] Vanilla is not autogamous, so pollination is required to make the plants produce the fruit from which the vanilla spice is obtained. [ 2 ]
The evolution of photosynthesis refers to the origin and subsequent evolution of photosynthesis, the process by which light energy is used to assemble sugars from carbon dioxide and a hydrogen and electron source such as water. It is believed that the pigments used for photosynthesis initially were used for protection from the harmful effects ...
Plant cells are the cells present in green plants, photosynthetic eukaryotes of the kingdom Plantae. Their distinctive features include primary cell walls containing cellulose, hemicelluloses and pectin, the presence of plastids with the capability to perform photosynthesis and store starch, a large vacuole that regulates turgor pressure, the ...
Broccoli is an annual plant which can grow up to 60–90 cm (20–40 in) tall. [ 11] Broccoli is very similar to cauliflower, but unlike it, its floral buds are well-formed and clearly visible. [further explanation needed] The inflorescence grows at the end of a central, thick stem and is dark green. Violet, yellow or even white heads have been ...
Phytoestrogen. A phytoestrogen is a plant-derived xenoestrogen (a type of estrogen produced by organisms other than humans) not generated within the endocrine system, but consumed by eating plants or manufactured foods. [ 1] Also called a "dietary estrogen", it is a diverse group of naturally occurring nonsteroidal plant compounds that, because ...