Search results
People also ask
What is natural selection in biology?
What are examples of natural selection?
How does natural selection affect a species?
How does evolution by natural selection work?
Jan 15, 2021 · Definition. Natural selection is a pressure that causes groups of organisms to change over time. Animals inherit their genetics from their parents or ancestors, and the environment is constantly changing. So, no organism is perfectly adapted to its environment. Thus, natural selection is constantly influencing the evolution of species.
- Gabe Buckley
Oct 19, 2023 · Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others. Individuals with adaptive traits — traits ...
Natural selection is a mechanism of evolution and explains how species adapt to their environment over time through variations in traits. Examples include the peppered moth adapting to industrial pollution, yearly flu virus changes, and antibiotic-resistant bacteria.
- 18 min
- Sal Khan
- Just curious, are viruses living?Viruses are a borderline case but generally are not considered to be alive. Although they contain DNA (or RNA), they lack the machinery to replicat...
- I have a quick question. Why do species vary? For example why are some people taller or shorter than...This is a good question :) I'd like to explain it from both a technical and practical point of view: Technically, lets say that maybe once upon a t...
- What causes these "random mutations"? Has this been answered or it is still a mystery of the univers...There are 3 ways a mutation can occur unfortunately I wouldn't feel comfortable going too indepth as I don't know it will enough to explain each st...
- Why aren't there animals that are in the middle of different stages of development?I'm not quite sure what you mean by "in the middle of different stages of development". I guess from the context, you mean in the process of evolvi...
- Would it be accurate to think of evolution as being similar a game of telephone? As a word is passed...Yes, You can say in that game of telephone, that 'natural selection' would favor a word that very easy to pronounce and not very prone to being mis...
- Whats an RNA ?RNA is Ribonucleic-acid. It is a polymeric molecule made up of one or more nucleotides. A strand of RNA can be thought of as a chain with a nucleot...
- Do we (by "we" I mean science) actually know what causes the changes ? Because, as the bacteria exam...Very good point Daniel. The resistant bacteria did not always exists. 2 important things to know about bacteria: 1. Due to the simple nature of bac...
- why do we fall ill?Because another organism bent on benefiting itself at our expense has taken root inside our body ex, the cold or the flu. Sometimes we fall ill bec...
- Can you give us some mammal or plant examples of natural selection?Miyanda - your example is a good one, but a bit oversimplified. The Native Americans did have an immune system - all humans do. It was actually the...
Natural selection is one of the basic mechanisms of evolution, along with mutation, migration, and genetic drift. Darwin’s grand idea of evolution by natural selection is relatively simple but often misunderstood. To see how it works, imagine a population of beetles: There is variation in traits.
Organisms with advantageous traits are likely to have more offspring. These offspring inherit their parents’ advantageous traits. As a result, the advantageous traits become more common in the population over multiple generations. This process is called natural selection.
- Wait, dogs have a super strong sense of smell. bugs taste through their feet. sharks can taste and s...We have the ability to build superstructures hundreds of meters high, we have nukes, we can communicate through billions of people and still be org...
- Why do animals have disadvantages and why cant they have just advantagesBecause as the environment shifts with time, a trait that was once disadvantageous will become advantageous once more. This can be seen with the pe...
- i wonder how rare are black peppered moths nowNot rare at all according to google.
- How can things turn in a colour? Why can't I turn blue or yellow?Technically speaking, you could turn blue and yellow. Take a bird for example: birds have evolved to have flashy/bright colors to attract a mate or...
- Why are organisms with advantageous traits are more likely to reproduce?Organisms with advantageous traits are more likely to reproduce because they are more likely to survive long enough to have offspring and raise the...
- if we put some in an enviroment with a more gray place would they survive?It depends on the shade of gray if they can camouflage in it, then they can still survive or they might need to change their fur color trait or mov...
- If organisms have disadvantageous traits, are we with it?We can have disadvantageous traits too. I for one have really bad eyesight. Humans adapted and made glasses though.
- how old is joe bidenThis isn't really a "biology" question but Joe Biden is 80 years old *Happy Learning*!
6 days ago · Natural selection, process in which an organism adapts to its environment through selectively reproducing changes in its genotype. It reduces the disorganizing effects of migration, mutation, and genetic drift by multiplying the incidence of helpful mutations, since harmful mutation carriers leave few or no offspring..
When a phenotype produced by certain alleles helps organisms survive and reproduce better than their peers, natural selection can increase the frequency of the helpful alleles from one generation to the next – that is, it can cause microevolution. Example: Rabbit coat color.
