Arthropoda and molluscs have open circulatory systems - meaning haemolymph (Their equivalent to blood) directly bathes the tissue, and isn't enclosed in blood vessels, as seen in a closed blood system, as in humans for example.
running water can be used as an energy source to produce hydroelectric power.
Answer is a. he projections are trichocysts, released for the self-defense of the <em>Paramecium</em>.
When <em>Paramecium</em> is stimulated by chemicals such as picric acid or an injurious enemy, it responds by throwing out transparent spine-like projections called trichocysts. The discharge of trichocysts forms an effective barrier round the animal and protects it from acid or enemy.
Pedigree analysis helps in determining the mode of transmission of a particular inherited trait within a family tree. Usually large extended family.
Carbon emissions are responsible for the global warming crisis. More specifically they are responsible for bad air quality. Greenhouse gases. Sometimes also cancers
