Hi :)
For middle school biology, I think all you need to know is that when you see the word organic it instantly means it has the element: carbon.
And usually a lot of hydrogens too, but never without carbon.
I uploaded a picture of an organic molecule called capsaicin.
It's what makes hot peppers spicy!
Notice how many C you see for Carbon!
Hope this helps :)
Transcription is the process in which mRNA is synthesized from DNA template with the aid of RNA polymerase.
Hope this helps!
Genetic variation is caused by mutations in the gametes and meiosis.
The large ears of the rabbits may help them hear when predators are coming. If they hear them coming, then they may be able to escape.
A polar bear with dark fur would be more obvious to its prey, who would more easily avoid him. The other white ones can blend in better and have a less chance of being detected by prey.
Organisms have genetic variation
The conditions change
The ones better at coping... survive
Survivors breed and pass on their variation
natural selection occurs
Some bacteria are more resistant
Antibiotic is added
Some bacteria survive
The survivors reproduce
Low levels of antibiotic remain
Charles Darwin
Hope I helped