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Metanephridia - Excretion
Metanephridia are found in coelomates (e.g., annelids). These animals have evolved a close circulatory system intimately associated with the excretory organs resulting in direct exchange of material between the two systems. In these worms an isosmotic fluid appears initially in the nephridium due to filtration of the coelomic fluid through the ciliary mesh of the nephrostpme. Salt is later withdrawn from the fluid as it passes through the extensively looped duct and finally dilute urine is discharged.
When did life appear on earth? It is estimated that the life on earth emerged about 3.5 billion years ago, thus 1 billion years after the formation of the planet.
A healthy skeletal muscle fiber is isolated and has no external forces on it. It has normal intracellular levels of ATP and is bathed in physiological saline. Which of the follow
It is a newer agent that inhibits cholesterol absorption by the enterocyte. It reduces cholesterol absorption by the enterocyte. It reduces cholesterol absorption by 23 per cent-50
Unconventional oilseed cakes/meal Deoiled sal (Shorea robusta) seed meal: It is a byproduct obtained after the extraction of oil from sal seeds. It is found to be high in NF
Acute Myocardial Infarction : Patients with acute non-Q myocardial infarction may need urgent intervention as indicated for cases of unstable angina.
What is genetic drift?
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
Which of the following is not a difference among DNA primase and DNA polymerase? A. DNA primase can initiate replication of DNA de novo whereas DNA polymerase needs a short oli
Radiometer Radiometer measures the flux of energy of all wavelengths received on a single surface of the receiver. There are also instruments that can measure the difference be
WHAT IS IMPORTANT VALUE INDEX OF PLANT
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