Biology focuses on a single living organism at a time, examining the life stages, reproduction, morphology and range. In the case of fauna, there is considerable attention to the motor and social behavior of each species. For both animals and plants, biologists examine carefully the relationship of organisms to nutrient sources. Subject species may be microscopic as small as bacteria, or include the largest creatures ever known, such as present day cetaceans or extinct dinosaurs. Some biology studies focus on the reconstruction of events deep back into prehistory, while other research is preoccupied with events that are happening today and forward into the future.
Wind turbine bird mortality is a by-product of large scale wind farms, which are increasingly promoted as an alternative to fossil fuel derived energy production. To adequately...
Asteraceae: The sunflower familyLast Updated on 2014-10-07 21:50:48Asteraceae, also called Compositae, is one of the largest angiospermic plant families among the dicotyledonous, based on the large number of species (1,620 genera and 23,600 species) that represent this plant family with cosmopolitan distribution (Funk et al.,2005). Constituting almost 10% of all flowering plants worldwide, Asteraceae is usually divided into 12 subfamilies (Funk et al., 2009). Except for Antarctica, the family is most abundant in the sub-tropical and temperate latitudes, occurring commonly across meadows, valleys, grassy plains, rolling plateaus, and mountainous slopes (Funk et al., 2005 ; Bayer et al., 2007). It includes edible, medicinal, noxious, invasive and endangered species (Heywood et al., 2007). The majority of plant members representing this family are herbaceous in nature, but shrubs and trees, as well as creepers and climbers, are also... More »
BiomassLast Updated on 2014-09-30 22:09:21
Biomass is a term in ecology for the mass of living organisms in a given ecosystem. Biomass can refer to the living stock of species in a given habitat, but can also refer to a harvested subset or to a decaying subset (especially in the case of forest floor detritus). Biomass may refer to the total mass of all species within the study area, and is thus sometimes called community biomass; but biomass may also refer to a taxonomic subset. Biomass can be expressed as the average mass per unit area or unit volume, or simply as the total mass in the community. Plants characteristically comprise the greatest part of the biomass of terrestrial system. In the animal kingdom, iIronically, the smallest creatures in an ecosystem typically represent the largest quantity of its biomass. It is important to note that the relative biomass species mix may change considerably from season... More »
Arecaceae: The Majestic Family of PalmsLast Updated on 2014-09-25 11:35:18Arecaceae (Syn. Palmae) is a monocotyledonous plant family containing species of tropical climbers, shrubs and trees commonly known as Palm trees or simply Palms (Figs 1-3). The Arecaceae is a monotypic family in the order Arecales. The family contains several commercially important species such as coconuts, area nuts and date palms, as well as a large number of indoor and ornamental species. Palms are commonly cultivated and well known horticulturally across the planet.
Palms are most conspicuous in coastal areas in tropical and sub-tropical ecological zones as well as in the Arabian deserts and throughout the continents of Africa, Latin America, South and South-East Asia, Oceania and coastal US and adjoining island groups. Palms are also common in tropical evergreen forests and in every available ecological habitat in the tropics and sub-tropics covering a... More »
PollinationLast Updated on 2014-09-06 22:10:21
Pollination in angiosperms and gymnosperms is the process that transfers pollen grains, which contain the male gametes (sperm) to where the female gamete(s) are contained within the carpel; in gymnosperms the pollen is directly applied to the ovule itself. The receptive part of the carpel is called a stigma in the flowers of angiosperms. The receptive part of the gymnosperm ovule is called the micropyle.
The study of pollination brings together many disciplines, such as botany, horticulture, entomology, and ecology. The pollination process as an interaction between flower and vector was first addressed in the 18th century by Christian Konrad Sprengel.
Pollination is a necessary step in the sexual reproduction of flowering plants, resulting in the production of offspring that are genetically diverse. It is important in horticulture and agriculture, because fruiting is... More »
Apiaceae or Umbelliferae: The carrot and parsley familyLast Updated on 2014-08-22 14:29:26The Apiaceae (Umbelliferae) family is comprised of over 280 genera and nearly 3,000 species, distributed over the sub-tropical, sub-temperate and temperate regions. Plants of the family are predominantly herbaceous and typcially are used commercially as aromatic medicinal plants and spices around the globe.
Leaves are alternating and either pinnately or palmately compound and exstipulate. Flowers are small, predominantly bisexual (hermaphrodite) and regular, with some variations observed across different genera. Calyx is characterized by 5 sepals, corolla consists of 5 inflexed petals (often absent in some genera). The androecium consists of 5 stamens and the gynoecium is comprised of a compound pistil produced due to fusion of the two carpels and characterized by the presence of a pair of styles staged on a broad platform (stylopodium). The ovary is of... More »
Drag and drop the content to change the order of featured content. The top nine will be displayed.