Answer:
Pangea was the world's supercontinent, with its splitting came preliminary continents of today.
Explanation:
The splitting occurred due to the movement of tectonic plates, where plates spread apart and moved the landmasses with it.
Answer:
The correct answer is - myofibril.
Explanation:
A myofibril or muscle fibril is a unit of the muscle cell. It is a rod-like muscle cell. Myofibril chains are composed of the tubular cells called myocytes. These are made up of several subunits called sarcomere.
Myofibrils are long filamentous that run parallel to each other to form muscle fibers.
Thus, the correct answer is - myofibrils.
the animals that where living there don't have the trees to help them live and don't give them the food that the trees gave them.
The ozone layer over the Arctic change with the seasons as "it peaks in spring and decreases in fall".
<u>Option: B</u>
<u>Explanation:</u>
The variations with the seasons in ozone layer over the Arctic is triggered by Polar Stratospheric Clouds (PSCs) developing in the polar regions during winter. These clouds have a surface area where the chemical reaction of CFC occurs at a rapid rate that induces ozone depletion in the polar stratosphere by as much as 50%. It occurs in the spring, as the temperature begins to warm up, resulting in an rise in the chemical reaction rate of these cloud surfaces.