Why do phospholipids form a bilayer in water?

Answer: D) By decreasing the activation energy of a reaction

A catalyst is a substance that speed up the rate of chemical reaction without affecting the product of the reaction. They only affect the rate of reaction not the yield of reaction.

Catalyst provide an alternative reaction pathway that has lower activation energy  than that of uncatalysed reaction. It increases the frequency of collision and because of these greater collision which lowers the activation energy of the reaction.

A catalyst works by decreasing the activation energy of a reaction, providing an alternative pathway for the reaction to occur with lower energy barriers. Therefore, the correct answer is option is d.

A catalyst works by D. by decreasing the activation energy of a reaction.

A catalyst is a substance that speeds up a chemical reaction without itself being consumed or permanently changed in the process. It achieves this by providing an alternative reaction pathway with a lower activation energy. The activation energy is the minimum amount of energy required for a reaction to occur.

Here's how it works:

In a chemical reaction, reactant molecules need to overcome an energy barrier, represented by the activation energy, to transform into products.

Catalysts provide an alternative route for the reaction that has a lower activation energy. This lower activation energy pathway is often referred to as the catalyzed pathway.

By reducing the activation energy, the catalyst allows more reactant molecules to possess the required energy to overcome the barrier and react, thus increasing the reaction rate.

Importantly, the catalyst itself remains unchanged at the end of the reaction and can be used repeatedly for other reactions.

In summary, a catalyst facilitates a chemical reaction by lowering the activation energy required for the reaction to proceed, making it easier for reactant molecules to convert into products and increasing the reaction rate.

Therefore, the correct answer is option is d.

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Answer:

Autotrophs -

Autotrophs prepare their own food by the process called photosynthesis or by some other raw materials or Energy. Autotrophs are also known as producers.

Some examples of Autotrophs are :

• Plants
• Fungi
• Bacteria

Heterotrophs -

Heterotrophs can not prepare their own food and they depends upon autotrophs. Heterotrophs are also known as consumers.

Some examples of Heterotrophs are :

• Humans
• Birds
• Dogs

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Final answer:

Autotrophs and heterotrophs differ in their energy source, nutritional mode, and carbon source. Autotrophs can produce their own food through photosynthesis or chemosynthesis, while heterotrophs rely on consuming other organisms for energy.

Explanation:

Autotrophs and heterotrophs are two types of organisms that differ in how they obtain energy. Here are three key differences between them:

1.  
2. Energy Source: Autotrophs can convert sunlight or inorganic compounds into energy through photosynthesis or chemosynthesis, respectively. This means they can produce their own food. Heterotrophs, on the other hand, obtain energy by consuming organic matter. They rely on consuming other organisms for their energy needs.
3.  
4. Nutritional Mode: Autotrophs are capable of synthesizing their own organic compounds, including carbohydrates, proteins, and lipids. They can produce these essential molecules through metabolic processes. Heterotrophs, however, rely on consuming preformed organic compounds for their nutritional needs. They cannot synthesize these molecules on their own.
5.  
6. Carbon Source: Autotrophs utilize carbon dioxide from the atmosphere or dissolved in water as their carbon source for photosynthesis. They convert this carbon dioxide into organic compounds. Heterotrophs, on the other hand, obtain their carbon from the organic compounds they consume. They break down these organic compounds to release energy.

Understanding these differences helps us appreciate the diverse ways in which organisms obtain and utilize energy.

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Answer:

desert biome.

Explanation:

The answer is the object's mass and direction. Hope it helps! #Brainiac

Answer:

Explanation:  Guard cells in the plants prevent water loss from it in cases of soil dryness or high temperature by closing themselves. If this does not happen, water will keep leaving the plant by the process of transpiration in these harsh conditions and the plant will not have the important medium for the homeostasis process to continue.