What is a fossil?
Fossils are fossilised (petrified) remains of animals/plants. A fossil though, is only a fossil, when it is from a different geological era.
How does that relate to evolution?
Evolution and fossils are very related. When we scan the DNA of different fossils, we find that the DNA can be similar to living species we have today, which helps us trace back their origins.
Tracing back a species origins is not something we do just to see how that species changed along time. When we manage to make an evolutionary chart of a species, we know how they changed, what they changed, and maybe not more, but very importantly, when the previous species were extinguished. If we know when they were extinguished, we can find out what caused that extinction:
- A lack of adaptation.
- Lack of resources.
- Temperature changes.
- Increase of predators.
- Deadly migrations.
- Other natural disasters.
So, in other words, by studying one species, we can study our own planet.
Hope it helped,
BioTeacher101
Answer:
1. D
2. B
Explanation:
1.They inject the virus when sucking out the blood.
2. Bear/Mouse because bears don't seek out and eat mice.
True.Consciousness means a state of mind in which one is aware of the surrounding and himself.The one who is aware of his mind ,thoughts,and the environment near him is called a conscious person.Consciousness is more about thought,feelings ,neuroscience psychology,cognitive development.If one needs to be civilized he must be aware of the disciplines and thought process he is living in.It is an exclusive part of civilizations as your mental health defines your social health.The altered state of consciousness is that person starts being uncivilized by consuming alcohol and drugs.We can say so that consciousness appears to be an exclusive feature of organisms that develop civilization.
Answer: Option A) Cells
Explanation:
The soft lining inside the mouth is an example of cell.
The inner lining of mouth is made up of the mucous membrane. Soft lining is consist of squamous epithelium also called as oral epithelium, which is a type of cell.
Epithilial cells are arranged in layers upon a basal membrane. It function to protect mouth against abrasion.
Hence the correct option is A) cells.
My guessed answer for this would be immigration... not sure though.