The amount of energy lost at the transition between each trophic level of the pyramid of energy is about _______.

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Answer 1

Answer: What is generally said is that only 10% of energy gets retained at transfer, which means that 90 % is lost - this is the correct answer. The "loss" of energy mostly means that the energy gets transformed into heat (since we know that in any system no energy can be lost - this energy has to go somewhere, according to the laws of physics. ) and because not all energy can be absorbed (for example not all tissues are digested by the predator)

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What is the chemical symbol for ozone

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Ozone is a molecule made of three oxygen atoms: O3

Valves called ______________ hold the food in the stomach.

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Pyloric sphincter is what holds your food in your stomach

If the asthenosphere cooled and stopped flowing. How would you expect the movement of tectonic plates in the lithosphere to change? The tectonic plates would _________?

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If the asthenosphere cooled and stopped flowing. The movement of tectonic plates in the lithosphere changes. The tectonic plateswould move less than 2 cm a year.
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Which organisms transform nitrogen to a form that is useful to plants

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The answer is nitrogen-fixing bacteria.

Plants are not able to directly use atmospheric nitrogen. It must be converted into different form through a nitrogen cycle. In the process of nitrogen fixation, nitrogen fixing bacteria converts atmospheric nitrogen into ammonium. In the process of assimilation, plants incorporate ammonium into proteins.

Some legumes have a symbiotic relationship with bacteria that live in their root system. These bacteria are called Rhizobia and have the ability of nitrogen-fixation.

The answer to this question is "the nitrogen-fixing bacteria"

Nitrogen-fixing bacteria are a type of organisms that transform nitrogen to a form that is useful to plants. These microorganisms are capable of transforming atmospheric nitrogen into fixed nitrogen.

You might find _____ in the Arctic.

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you might find hydrophytes in the arctic

A DNA segment is changed from -AATTAG- to -AAATAG- . what is this an example of?

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This has both an addition (or insertion) and a deletion mutation which are both types of frameshift mutations.

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