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
Benthic organism i think!!
Answer:The anesthetic may cause a severe headache, which is treatable."
Explanation:
Spinal anesthesia is a type of anesthesia which is administered locally using a fine needle between L3 and L4 space or L4 and L5 space in order to avoid injury to the spinal cord. This procedure is usually carried out by a trained health personnel such as:
- a nurse anesthetists and
- anesthesiologists
Spinal anaesthesia can be used in different surgical procedures such as Caesarea sections and to manage pain during vaginal delivery in MULTIGRAVID CLIENTS, which are those clients who has been pregnant more than once.
Caesarean section is usually done while the patient is awake with the use of spinal anaesthesia. Therefore it's important to explain any possible side effects from the drug to the patient which includes a severe type of headache called post-spinal headache and it's treatable.
B I think . Im not sure tbh
