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Each Acetabularia cell is composed of three segments: the "foot" or basal segment which contains the nucleus, the "stalk", and the "cap". Hämmerling exchanged caps between individuals from two species, A. mediterranea and A. crenulata. A. mediterranea has a smooth, disc-shaped cap, while A. crenulata has a branched, flower-like cap.
Life cycle of Acetabularia acetabulum. This alga adheres to the substrate with rhizoids (root-like processes), and these are the only part of the alga present in the winter. . The thallus consists of a single cell, and in the spring a slender stem develops from the holdfast, growing vertically to a length of about 5 cm (2 i
Shortly thereafter, the mediterranea regenerated the removed parts, but with the characteristics from the crenulata species. [4] This experiment demonstrated that the nucleus contains the genetic information and controls development. [7] The experiment also proved the existence of morphogenetic substances, which would eventually become known as ...
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Acetabularia caliculus, the umbrella alga, is a species of green alga found in shallow temperate and tropical seas. It usually grows on pebbles, shells or pieces of rock, and is often found in seagrass meadows , on mudflats and coral reefs , in estuaries and growing on the submerged roots of mangroves .
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