There is a few condition to ensure a high-quality CPR accomplished:
1. Depth= At least 5cm or 2 inch
2. Complete Recoil= Let the chest return to normal
3. Frequency: At least 100 times a minute
4. Minimal interruption = don't stop too much
5. Avoid hyperventilation: Don't give too much air
The Rutherford model devised by Ernest Rutherford in 1911 was the model that discovered that atoms are mostly empty space, and that the atom has a relatively high charge.
Answer:
Heterotrophs are the organisms which cannot prepare their food on their own like autotrophs instead are dependent on other mode to obtain the organic substances from the environment. This method is common in animal and fungi groups.
Although both fungi and animals are heterotrophs their mode of heterotrophic is different as fungi obtain organic substance b secreting many digestive enzymes which digests the complex biomolecules and the fungi obtain the organic substances whereas the animals swallow or ingest the material and then digests it.
With the beginning of the middle proterozoic comes the first evidence of oxgen build up in the atmosphere. with is catastrophe came eukaryotic forms. these include multicellular algae, and toward the end of the proterozoic the first animals
