Meaning:Variation means small difference in a species.
Example: All humans are the same species, but we are differ in skin type, hair colour, height etc.
Cause: Variation happens because of the genes.
Types:
Inherited variantion
Environmental Variation
What are species ?
ANS: Scientist group living organisms in to diffrent kinds , called species .
. A species is a group of organisms that all share the same characterastics .
key word
. classification
. It shows how every type of organism we know of is connected to all the others .
People use a lot of energy each day .
. our body use energy for moving , for thinking , for growing and keeping warm .
Energy - is the ability to do work .
Question
From were do we get energy ?
ANS: Well, according to the law of conservation of energy.
Because I had only that much in that topic and it is a small topic in my note I have done more drawings and a digram
We share our earth with million of other organisms .
What is conservation ?
ans: Saving something or someone
Key word
. Ecosystem - al around us is ecosystem.
. Urbanisation - The. process of an ingresing preperation .
🌿 What Are Species?
Scientists group living organisms into different kinds called species.
A species is a group of organisms that share similar characteristics.
All organisms are connected to one another through classification — it helps scientists understand how living things are related.
🧩 Classification
Classification means sorting living things into groups based on how they are alike.
It helps scientists study and understand the great variety of life on Earth.
Deciding how to classify a new organism can sometimes be difficult.
For example, it’s easy to tell that a jellyfish and a tiger are different species — but some cases are not so simple!
👩🔬 Taxonomists
Taxonomists are scientists who study how living things are classified.
They carefully observe animals and plants to decide which species they belong to.
🔬 Biological Species Concept (BSC)
According to the Biological Species Concept,
Organisms belong to the same species if they can mate and produce offspring that can also reproduce.
If they cannot produce offspring together, they belong to different species.
🧬 Reproductive Isolation
Reproductive isolation means two species cannot reproduce with each other.
This keeps species separate and helps new species evolve over time.
🌱 Introgression (Gene Flow)
Sometimes, offspring from two different species can still mate with one of the parent species.
This process is called introgression.
It allows gene flow (sharing of genetic traits) between two species.
🏞️ Habitat
A habitat is the natural home or environment of a species.
Different species live in different habitats — like forests, oceans, deserts, or grasslands.