Observe the mineral below and identify it. When tested for hardness, a penny does not scratch it but glass does. O A. Taenite: No cleavage, hackly fracture, metallic luster, no reaction to acid, gray streak, hardness 5
B. Olivine: 2 planes of cleavage at 90 degree angles, glassy luster, no reaction to acid, no streak, hardness 6.5
C. Calcite: 3 planes of cleavage, glassy luster, reacts to acid, white streak, hardness 3.
D. Plagioclase Feldspar: 2 planes of cleavage at 90 degree angles, pearly luster, no reaction to acid, white streak, hardness 6.5
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Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.