Biochemical- apart of the second defense system
<span>The frontal and parietal bones of the skull are susceptible to compressed skull fractures. This is especially important in newborn babies. There is a location in the skull called the Anterior Fontanelle, where two frontal and 2 parietal bones meet. This area of the skull is very soft until as late as 2 years old.</span>
Answer: Resemble structures formed by bacterial colonies found today in some shallow marine bays
Explanation:
Stromatolites are laminated accretionary structures that have synoptic relief (i.e., they stick up above the seafloor). They grow in extremely salty shallow lagoons or bays. Stromatolites building community includes the oldest known fossils.
They are formed by bacteria such as cyanobacteria.
This is why they resemble structures formed by bacterial colonies found today in some shallow marine bays.
Answer:
A. One cell took over another cell
Explanation:
Mitochondria is an organelle present in a eukaryotic cell that performs the function of producing ATP molecules from the available substrates in the cell.
The mitochondria organelle has its DNA other than the cellular DNA which shows that it was once an independent organism. This was proved by the endosymbiotic theory that during the formation of the eukaryote cell, the proto-eukaryote engulfed the chemosynthetic bacteria which later formed the symbiotic relationship with the cell and evolved into the mitochondria.
Thus, Option-A is the correct answer.