In a food web, each step in the transfer of energy and matter is referred to as a trophic level. These steps provide an illustration of energy flow within an ecosystem, with examples being producers, consumers, and higher-level consumers. The transfer of energy - although more complex - is more accurately depicted in a food web than in a food chain.
The term for each step in the transfer of energy and matter within a food web is known as a trophic level. These are the different steps in a food web or chain at which the transfer of energy occurs. An example of these levels can include producers, primary consumers, and higher-level consumers, each playing specific roles in the overall energy flow.
A food chain is a linear system that offers a simplified view of energy transfer within an ecosystem, while a food web offers a more complex and holistic view of the multiple trophic interactions and energy transfers within an ecosystem.
It is important to mention that energy transfer efficiency influences the structure and dynamics of ecosystems. This is due to the fact that with each energy transfer, some energy is lost, often in the form of heat. This limits the length of food chains within a food web.
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Answer:
Explanation:
Nicotine is a type of stimulant that is chemically alkaloid. It works as the receptor agonist at the nicotinic acetylcholine receptor. It is a type of addictive chemical that increases the blood flow, heart rate and some biochemical reactions of the body. In the brain, it has stimulation as well as blocking effect. Medically, it is used for various purposes such as quitting smoking and some other.
Nicotine stimulates and then blocks cholinergic receptors in the brain, leading to both stimulating and relaxing effects.
Nicotine acts in the brain by first stimulating and then blocking cholinergic receptors. It first acts as a stimulant, increasing the release of acetylcholine, which causes excitatory effects in the brain. Eventually, the cholinergic receptors become desensitized and eventually blocked, leading to a reduction in acetylcholine's activity. This process helps explain why tobacco usage can both stimulate and relax users. When nicotine binds to these receptors, it activates them, leading to the release of dopamine and other neurotransmitters, producing pleasurable effects.
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The answer is C. Just like other most other plants, plant-like protists have the chlorophyll pigment that harnesses sunlight to make their own energy. This is why they are categorized as autotrophs. Animal-like protists, on the other hand, are heterotrophs because they consume other organic molecules by engulfing hence categorized heterotrophs.
Assuming this is a question with 4 different answers...
The answer is B: "Similarities can be seen among related organisms, which shows common ancestry."
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-RxL
Answer:
True
Explanation:
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