Here is a passage discussing the theory of evolution by natural selection. Please summarize the key points made:

The theory of evolution by natural selection, formulated by Charles Darwin, is a unifying concept in biology that explains the diversity and adaptation of species over time. It rests on several key principles:

First, individuals in any population have heritable variations in their traits, caused by genetic mutations and sexual reproduction mixing genes across generations. Some variations may be beneficial or detrimental in a given environment.

Second, most species produce more offspring than can survive and reproduce given limited resources in an environment. This causes struggle and competition for survival.

The key mechanism is natural selection - individuals with advantageous variations that are better adapted to the environment have a higher chance of surviving and reproducing than individuals with less favorable variations. These beneficial adaptations get passed on to future generations.

Over many generations, natural selection causes species to accumulate adaptations tailored to their environment. Eventually, this process can lead to the emergence of new species as groups become isolated and diverge. Natural selection also eliminates traits that are disadvantageous in current conditions.

This process over vast timescales leads to evolution of all life on Earth from common ancestors through descent with modification.
Here is a passage discussing the theory of evolution by natural selection. Please summarize the key points made:

The theory of evolution by natural selection, formulated by Charles Darwin, is a unifying concept in biology that explains the diversity and adaptation of species over time. It rests on several key principles:

First, individuals in any population have heritable variations in their traits, caused by genetic mutations and sexual reproduction mixing genes across generations. Some variations may be beneficial or detrimental in a given environment.

Second, most species produce more offspring than can survive and reproduce given limited resources in an environment. This causes struggle and competition for survival.

The key mechanism is natural selection - individuals with advantageous variations that are better adapted to the environment have a higher chance of surviving and reproducing than individuals with less favorable variations. These beneficial adaptations get passed on to future generations.

Over many generations, natural selection causes species to accumulate adaptations tailored to their environment. Eventually, this process can lead to the emergence of new species as groups become isolated and diverge. Natural selection also eliminates traits that are disadvantageous in current conditions.

This process over vast timescales leads to evolution of all life on Earth from common ancestors through descent with modification.
user
- Individuals in populations vary in their heritable traits
- Species produce more offspring than can survive with limited resources
- Individuals with advantageous adaptations survive and reproduce more
- These beneficial adaptations get passed to future generations 
- Over time, natural selection results in adaptation to the environment
- Isolated groups accumulate enough differences to form new species
- Natural selection also removes disadvantageous traits
- This process over long timescales leads to evolution of all life
assistant
Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Summarize the main points in the text below - 

You'll always want to have access to sufficient emergency funds for, well, emergencies. Make sure you can afford a health emergency (some insurance plans require you to pay first and claim for reimbursement later), a one-way ticket home in the event that something urgent happens, a missed flight, or a theft or unexpected mishap. And, more practically, you may find that you've under-budgeted and you need to increase your budget a bit while you're on the road, so having access to some emergency cash might prevent you from having to cut your trip short or miss out on things you wanted to see.

In short, you need to be able to afford to get yourself out of bad situations if you really have to. Remember that as a solo traveler you will generally not have another person readily available to help with bad situations, so it's up to you to be able to manage them.

It's a good idea to have a variety of different sources of emergency funds, including cash in hard currencies like US dollars or Euros, a credit card (and backup) with a decent limit, and a trusted friend or relative back home who can send you money in an emergency.
Response: - Have money set aside for emergencies like health issues or an emergency trip home
- Budget enough to get yourself out of unexpected situations if needed
- Remember, if you’re by yourself you will be the one managing any problems
- Carry a few different ways to pay for things if needed like cash and credit cards, and  have someone to borrow from back home if needed

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.
