Answer:
The cell theory states that all biological organisms are composed of cells; cells are the unit of life and all life comes from preexisting life.
Explanation:
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<span>A symbiotic relationship in which two different organisms benefit from living together is called "Mutualism"
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Answer:Polaris is directly overhead (i.e. at zenith) at the North Pole and at the horizon for an observer at the equator. The rule of thumb for the altitude of Polaris is that the altitude of Polaris equals your latitude on Earth.
Explanation:Polaris is directly overhead (i.e. at zenith) at the North Pole and at the horizon for an observer at the equator. The rule of thumb for the altitude of Polaris is that the altitude of Polaris equals your latitude on Earth.
Red algae can grow at deeper depths when compared to other algal groups because they are adapted to absorb blue light, which is required for photosynthesis.
Explanation:
Red algae, also known as rhodophyta, usually occur in the depths of seas. This is because of a unique adaptation in their structures, due to the presence of phycoerythrin - a pigment that reflects light that is red, while equipping the algae to absorb blue light. Hence, the algae appears red in colour.
All plants (including algae) require sunlight to be able to synthesize their own food through the process of photosynthesis. For plants that live in the oceans, the sunlight penetrating the waters is the only source of radiation in this regard.
The blue light in the radiation spectrum has the characteristic features of having the highest energy, as well as the shortest wavelength. This makes it the most energetic section of light, enabling it to penetrate to the ocean depths.
The phyrcoerythrin in the red algae absorbs this blue light for photosynthesis. This process occurs even at depths upto 500 feet, hence becoming an adaptive advantage for red algae to be able to survive at greater depths.
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<span>Winds are caused by air moving around in the atmosphere. Wind turbines harness the mechanical energy in wind and convert it into electricity. Solar energy is the source of the mechanical energy in wind.
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