Origin of Cycadofilicales The Cycadofilicales or Pteridosperms are popularly known as ‘seed ferns.’ This group of Gymnosperms includes trees or small plants bearing fern-like foliage. They flourished greatly in the Carboniferous period, also known as the ‘Age of Ferns.’ The plants first appeared in the Devonian, became very prominent in the Carboniferous, but remained widespread…
Life History Pattern The life history pattern of an organism is “the pattern of its survival and reproduction events during its life”. The traits that are studied in life history pattern includes morphological features like biomass, growth rate, size, phonological events, age at maturity, and reproductive features like fecundity (ability to produce new offspring), schedule…
Density Dependent and Density Independent Factors Demography is the study of all the possible statistics that affect the size of a population. Some biotic and abiotic factors limit the size of a population. These factors are broadly categorized into density dependent and density independent factors. Density Dependent Factors A factor that affects the size of…
There are many factors affecting herbicide carryover or residues in soil and plants like residue itself, some biotic (microbes, plants), abiotic (soil, moisture, light), and chemical (degradation process, half-life) factors. Herbicides destroy plants (herbs) and more specifically off-type plants or weeds. After destroying weed plants or limiting their growth, herbicide residues may persist in the…
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