Why do cells use fat and starch for long-term energy storage instead of ATP molecules?

the answer is c. Are set up around natural resource

Answer:

In the lock-and-key model of enzyme action, the substrate fits into the active site of the enzyme. Enzyme catalyzes a chemical reaction which starts with the binding of the substrate with the active site (specific region) present in the surface of the enzyme.

Some changes occur in the distribution of electrons in the chemical bonds which are present on the substrate and cause the reaction to leads the formation of products by the binding of the substrate to the enzyme.

The product which is released from the enzyme surface to regenerate the enzyme for next reaction cycle. The active site has unique ability means only one or few enzymes can react with similar compounds.

In the lock and key theory, the enzyme is the lock and key is the substrate. Which means only correct size substrate can fit into the active site of the enzyme.

Answer:Chloroplasts and a cell wall,

Chloroplasts for gathering energy and a cell wall to protect the cell are both unique features of plant cells in comparison to animal cells

Answer:

there is actually three characteristic in a plant cell.

Explanation:

Plant cells have a cell wall, a large central vacuole, and plastids such as chloroplasts. The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection The vacuous maintains turgid pressure against the cell wall.

Hope this helps : )

Answer;

An example of positive feedback loop is;

-When a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions.

Explanation;

-Feedback loops are therefore the process whereby a change to the system results in an alarm which will trigger a certain result. The result will  then either increase the change to the system or reduce it to bring the system back to normal.

-Feedback loops are important because they allow living organisms to maintain homeostasis (maintenance of internal environment of the body constant).

-A positive feedback loop occurs in nature when the product of a reaction leads to an increase in that reaction.  It moves a system further away from the target of equilibrium, by amplifying the effects of a product or event and occurs when something needs to happen quickly.

Final answer:

A positive feedback loop in biology is a process in which the end product of an action stimulates more of the same action to occur. An example is during child birth, where hormone release intensifies labor contractions, leading to further hormone release. This continues until the process is complete, differentiating from negative feedback loops which work to maintain homeostasis by reversing a process.

Explanation:

A positive feedback loop in biological systems is a process in which the end products of an action cause more of that action to occur. This contrast with a negative feedback loop, which works to stop a process in order to bring the body back to its set point. One of the examples provided is a classic example of a positive feedback loop: when a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions.

This is a positive feedback loop because the contractions that begin labor lead to the release of a hormone (oxytocin) that intensifies those contractions, which then causes more hormones to be released, and so on until the baby is born.

Other instances, such as when blood sugar is low or the heart rate is high, are illustrations of negative feedback loops, where the body works to maintain homeostasis by reversing a process.

Learn more about Positive Feedback Loop here:

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