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Ventilation of Tracheal System - Diffusion
Gaseous exchange due to diffusion generally takes care of the oxygen needs of most small insects. Similarly fairly large but inactive insects (e.g., some large caterpillars) do not actively ventilate the system. Diffusion alone is adequate provided the spiracles are kept open permanently. The same process accounts for elimination of carbon dioxide.
MUTATION THEORY (Hugo de Vries 1901) - New species are not formed by continuous variations but sudden appearance of variations i.e., mutation. Mutation are heritable and per
what is the excretory organ of lizard
Define Laser Tweezers Technology? In addition to above said classical methods, advance technologies can be used for obtaining pure cultures. Laser tweezers technology is useful
Purple (P) flowers are dominant and white (p) flowers are recessive. A homozygous dominant purple flower is crossed with a homozygous recessive white flower. what percentage of the
If three different traits are controlled by the unlinked genes A, B, and C, and each has multiple alleles so that A has 4 alleles, B has 6 alleles and C has 2 alleles, how many dif
What is the goal of risk assessment? The goal of risk assessment is to provide risk managers, who might be, for example, government regulatory officials, industry health a
Consider two species of organisms, species A and species B. Species A has a population in a community. Another population species B arrives into the same community, rather suddenly
Forests, grasslands and wetland protect landscapes against erosion floods and landslides through the binding action of plant roots. The root systems of plants hold soils in place,
What is Interspecific Competition in ecology explain? Populations in nature usually share their surrounding environment in time and space with populations of other species. If
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