The basic structure of a muscle fiber is comprised of actin and myosin protein chains that straddle each other in a fusiform arrangement. The actin and myosin arrays interlock and move past each other to cause contraction of the muscle. They then move back to their initial positions in relaxation. This gives muscles their elasticity and distensibility. The muscle fibers are bundled, in their 10s to 100s up into myofibrils around an endomysium. Many myofibrils are also bound up in a perimysium to form a muscle fiber.
Answer: Over thousands of years, the water filled one basin and then spilled over into the next, like a series of bathtubs overflowing.
Explanation:
Answer:
Migration
Explanation:
Birds have adapted to the changes in temperature (over generations) and know to migrate when necessary
Answer:
You would find the greatest variety of species in the tropics, and coral reefs. The Amazon basin in South America has the largest area of tropical forests where you could find the most variety of species.
Explanation:
The right answer is research reading and writing.
The research includes a collection of data, information, and facts for the advancement of knowledge.
Reading is undoubtedly an entertainment, but it is also a precious help to learn to express oneself and to think.
Reading is an awakening of the soul and the heart. Enjoyment of thought and feeling.
Writing is a graphic expression of language, it is a process that is currently used to immobilize, to fix the articulated language, fleeting in essence.
