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Lac tubes created by Kerria lacca Resin secreted by the female lac bug on trees is processed and sold as dry flakes.. Lac is the resinous secretion of a number of species of lac insects, of which the most commonly cultivated is Kerria lacca.
The secreted substance may remain deposited within the secretory cell itself or may be excreted, that is, released from the cell. Substances may be excreted to the surface of the plant or into intercellular cavities or canals.
Honeydew is a sugar-rich sticky liquid, secreted by aphids, some scale insects, and many other true bugs and some other insects as they feed on plant sap. When their mouthpart penetrates the phloem , the sugary, high-pressure liquid is forced out of the anus of the insects, allowing them to rapidly process the large volume of sap required to ...
Trees have a theoretical maximum height of 130 m (430 ft), [166] but the tallest known specimen on earth is believed to be a coast redwood (Sequoia sempervirens) at Redwood National Park, California. It has been named Hyperion and is 115.85 m (380.1 ft) tall. [ 167 ]
Well known resins include amber, hashish, frankincense, myrrh and the animal-derived resin, shellac. Resins are commonly used in varnishes , adhesives , food additives , incenses and perfumes . Resins protect plants from insects and pathogens, and are secreted in response to injury. [ 2 ]
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Scientists working in southwest England have found the oldest fossilized forest known on Earth, according to a new study. Fossilized trees dating back 390 million years are world’s oldest Skip ...
The rhizosphere is the thin area of soil immediately surrounding the root system. It is a densely populated area in which the roots compete with invading root systems of neighboring plant species for space, water, and mineral nutrients as well as form positive and negative relationships with soil-borne microorganisms such as bacteria, fungi and insects.