The group that contains silica the diatoms. Diatoms are unicellular algae. They have a silica based cell wall known as a frustule, which gives each diatom a particular shape.
Diatoms exist as single cells though some maybe found in colonies that create beautiful shapes which can be leaf - shaped, oval, round and other shapes.
The outer shells of diatoms are used in industry in the manufacture of many products such as toothpaste. The gritty texture in toothpaste is due to addition of diatoms .
Earth revolves around the SUN. The MOON revolves around the Earth.
Answer:
chemical reactions involve collisions between molecules. most collisions don't have either the right orientation or enough energy for the reaction to proceed. the molecules just bounce off each other, unchanged. incidentally that is why reactions proceed faster as the temperature increases - high temperature means molecules are moving faster
Explanation:
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In photosynthesis co2, h20, and sunlight energy is converted into glucose, and oxygen inside of the chloroplast. In cellular respiration glucose and oxygen are converted to ATP energy and carbon dioxide inside the mitochondria of the cell.
