. Adventures with animals and plants. Biology. Fig. 324 A plajit parasite, dodder, on golden- rod. Special roots enter the host. Hoiv can dod- der live without making chlorophyll? (blak- iston) There is another special relationship between organisms. Some plants live on dead organisms, getting their food from the dead tissue cells. They are called sap- 7-ophytes (sap'-row-fites). Saprophytes are always plants, usually fungi of some sort, either bacteria, yeasts, molds, or mushrooms. A few seed plants are sapro- phytes. See Figure 325. These sapro- phytes lack chlorophyll and, therefore, are un
. Adventures with animals and plants. Biology. Fig. 324 A plajit parasite, dodder, on golden- rod. Special roots enter the host. Hoiv can dod- der live without making chlorophyll? (blak- iston) There is another special relationship between organisms. Some plants live on dead organisms, getting their food from the dead tissue cells. They are called sap- 7-ophytes (sap'-row-fites). Saprophytes are always plants, usually fungi of some sort, either bacteria, yeasts, molds, or mushrooms. A few seed plants are sapro- phytes. See Figure 325. These sapro- phytes lack chlorophyll and, therefore, are unable to manufacture food as green plants do. Their method of nutrition is called saprophytism (sap'-row-fight- ism). A relationship of benefit to both or- ganisms. Certain protozoa spend their lives within the intestine of the termite;. Fig. 325 The hidian pipe is a saprophytic seed plant. It does not make chlorophyll. Most sap- rophytes belong to the group called ftmgi. (HUGH spencer) they need the food and the conditions supplied by the digestive tract of the temiite. But they are not parasites. They aid the termite by digesting the wood on which it has fed. If the protozoa are re- moved, the termite dies of starvation in the midst of plenty. Certain species of bacteria live within the intestine of the horse, helping it by digesting part of the food the horse eats. Such a relationship of mutual helpfulness between the mem- bers of two species is called symbiosis (sim-bi-oh'sis). Two plants may live to- gether, too, each aiding the other. A lichen (Figure 326) is really two plants, an alga and a fungus living in partner- ship. The alga makes the food used by both. The fungus helps hold the water needed by the alga for photosynthesis and by both organisms for growth. Symbiosis is less common than para- sitism. Sometimes, however, it is difficult. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorati
Size: 1512px × 1652px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublisherbostondcheath, booksubjectbiology
