Answer:
A sea sponge 760 million years old
Explanation:
It's unclear exactly how long sea sponges have been around, but they are at least old enough to be the longest-existing creatures on Earth, outside the realm of microorganisms (like bactery). The oldest evidence of a sea sponge found was a fossil discovered just last year in a 760-million-year-old rock. This beat the previous record for oldest sponge fossil, a 635-milloon-year-old sponge discovered in 2009. There may be still older fossils yet to find. But finding an older species is unlikely,as these simple organisms appear to be the progenitors of much more complicated life, including the first multicellular animals.
Answer:
c
Explanation:
if this is correct can you mark me brainliest plz
Answer:
this is system approach,
Explanation:
This is an old concept first proposed by Ludwig Von, for better understanding of complexity of a complex unit,.
This approach places individual elements in their environment, and study them through observation of the relationship they share with one another. It underlying principle in any organisation is that workers' well being is related to the product outputs.Thus an improvements in the system, has a postie effects on the outputs and and satisfaction of the workers.
This exchange process takes place in the aveolus (air sac) inside your lungs by diffusion.
it's from a different concentration gradient
the deoxygenated blood with carbon dioxide diffuse into a aveoli (which is in high concentration) and the aveoli release the oxygen into the blood stream (which is low concentration) therefore the blood will be oxygenated again
