(A) the softest layer of rock?
The expected reference range when obtaining oxygen
saturation level is 95%-100%.
The four reasons as to why the reference range may be lower
is due to the following;
-
Pulmonary edema
-
Person with history of COPD
-
Asthma and Emphysema
-
Pneumonia
In order for multicellular organisms to maintain homeostasis B. their organ systems must work together. So the answer is letter B. This is because in order for the body to maintain hemostasis, it has to maintain the body temperaturw in any weather and climate it will experience.
Sponges belong to the Phylum Porifera and hence are one of the most primitive organisms. The sponge would not be impacted by the drug.
Their bodies are asymmetrical. frame form can be cylindrical, vase-like, rounded or sac-like. they're diploblastic animals with layers, the outer dermal layer and the internal gastral layer. there's a gelatinous, non-cell mesoglea, in among these layers.
The phylum Porifera comprises the sponges. Sponges are simple invertebrate animals that live in aquatic habitats. despite the fact that the general public of sponges are marine, some species stay in freshwater lakes and streams.
Most sponges are hermaphroditic male and female cells exist in one animal and reproduce by using freeing spermatozoan into the water present day to be carried to other sponges, wherein they interact with eggs. Sponges also can reproduce.
Learn more about sponge here:-brainly.com/question/16524610
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Dress themselves because like that they are taking care of their physical body and keeping it nice and healthy
