Print of Elementary Zoology: Amoeba and Paramecium

Framed Prints From Alamy

Framed Print of Elementary zoology. Zoology. AMOEBA AND PARAMECIUM 35 a fixed shape to the body

Elementary zoology. Zoology. AMOEBA AND PARAMECIUM 35 a fixed shape to the body, are all specializations which make Paramoecium more complex than Amoeba. But the whole body is still composed of a single cell, and there is, as in Amoeba, no differentiation of the body-substance into different tissues, and no arrangement of body-parts as systems of organs. Par amoecium may occasionally be found reproducing. This process takes place very much as in Amoeba. The animal remains dormant for a while, the micronucleus then divides, the macronucleus elongates and finally divides in two, the proto- pla. Elementary zoology. Zoology. AMOEBA AND PARAMECIUM 35 a fixed shape to the body, are all specializations which make Paramoecium more complex than Amoeba. But the whole body is still composed of a single cell, and there is, as in Amoeba, no differentiation of the body-substance into different tissues, and no arrangement of body-parts as systems of organs. Par amoecium may occasionally be found reproducing. This process takes place very much as in Amoeba. The animal remains dormant for a while, the micronucleus then divides, the macronucleus elongates and finally divides in two, the proto- plasm of the body becomes con- stricted into two parts, each part massing itself about thewithdrawn halves of the macro- and micro- nuclei, and lastly the whole breaks into two smaller organisms which grow to be like the original. After multiplication or reproduc- tion has gone on in this way for numerous generations (about one hundred), a fusion of two Para- moecia seems necessary before further divisions take place. This process of fusion, called conjuga- tion, may be noted at some sea- sons. Two Paramcvcia unite with their buccal grooves together, part of the macronucleus and micronucleus of each passes over to the other, and the mixed elements fuse together to form a new macro- and micronucleus in each half. The conjugating Paramoecia now separate, and each divides to form two new individuals.. Fig. 6. — Paramceciuj?i sp. ; buccal groove at right. (From life.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York : H. Holt and company. © Paul Fearn

Artwork Licensed From Alamy

Your chosen combination is quickly and professionally made to order, our shipping page has more details

If you are not entirely happy with your items, simply return them to us within 30 days for a replacement or full refund. Please read our full returns policy.

Media ID 50622001