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Ureotelism - Excretion
Terrestrial animals with restricted water availability in the environment are faced with the formidable task of water conservation. Since they cannot afford to use liberal quantities of water for excretion, ammonia is converted into a less toxic product.
In mammals and semi-terrestrial adult amphibians, the major nitrogenous excretory product is urea, which is less toxic and easily soluble. These animals are therefore called ureotelic.
ERRORS IN FERTILIZATION - 1. Polyspermy - When more than one sperms are fused in an ovum, this condition is called polyspermy. 2. Polygynae - During oogen
Person X is a healthy human who has volunteered to take experimental drug Y. Person X has a normal dinner at 6 PM on April 1 and then does not eat for 12 hours. At 5 PM on A
Formation of Vegetative and Generative Cells The division of a pollen grain results in two unequal cells-the vegetative cell and the generative cell. The pollen grain is herea
Cystic fibrosis (CF) is caused by a variety of mutations in the CFTR gene. Imagine you have identified a new single-base pair mutation (A→T) in an exon of the CFTR gene. You wish t
Hepaticae (Liverworts) The gametophyte is thalloid body or simple stem and leaves, with aquatic or semi-terrestrial habit. Rhizoids are multiceillular. Some examples : Mar
Extremes of Heat and Cold Deserts are regions of aridity with rainfall of less than 20 cm per year and the soil, though L, fertile, is too porous to retain any water. In summer
lichens
Aeration A well-aerated soil is one in which gases are available to plant roots and other soil organisms, in sufficient quantities and in proper proportions to support their no
flying fish,cuttlefish,silverfish - pisces are correctly matched with taxonomic classification
In a numeric pyramid is it possible for the base to be smaller than the other levels? Ever since the numeric pyramid represents the quantity of individuals in each trophic leve
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