Biology

Succession in aquatic ecosystems

Communities develop over time In facilitation, each succeeding species makes its habitat more favorable for subsequent species In inhibition, each species inhibits the species that try to succeed it In tolerance, a species neither facilitates nor inhibits its successors Species richness usually increases during succession Biotic processes, such as herbivory, competition, and mycorrhizae, can deflect …

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Toxoplasma gondii: Life Cycle, characteristics, morphology

It is an obligate, intracellular, parasitic protozoan which causes toxoplamosis. It’s known to infect about 200 species of mammals and birds. There are usually two types of hosts; the definitive host and the intermediate host. Sexual development occurs in the definitive host while asexual development occurs in the immediate host. The definitive hosts of T. …

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Phylum filicinophyta (ferns)

The filicinophyta are also known as pteridophyta; commonly called the ‘ferns’. They are usually restricted to damp shady habitats. Few ferns are capable of growing in full sunlight, although bracken (pteridium) is a common exception. Ferns are common in tropical rain forests, where temperature, light and humidity are favourable. Ferns are vascular plants, meaning that …

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