Malphighian tubules absorb waste materials and salts from__________?
Correct answer: D. Hemolymph
- A. Blood
- B. Lymph
- C. Gut
- D. Hemolymph
Explanation
In insects, Malpighian tubules remove nitrogenous wastes and salts from the haemolymph, the insect equivalent of blood. They do not absorb these wastes from the gut or lymph, so choosing blood reflects a generalised but imprecise use of the term blood.
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About Excretion
Excretion removes metabolic wastes such as carbon dioxide, urea and excess salts, and differs from egestion, which removes undigested food. Questions cover kidney structure, nephron ultrafiltration, selective reabsorption and urine formation, along with the excretory roles of the lungs, skin and liver in maintaining homeostasis.
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