Answer:
A) actin and myosin is a correct answer.
Explanation:
- Myofibrils are the contractile fiber and they are made of actin and myosin.
- Myofibrils are made of thick myofilaments and thin myofilaments.
- Thick myofilaments are made up of myosin whereas thin myofilaments are composed of actin.
- The functional unit of muscle is Myofibrils and contraction of muscle occurs due to myofibril, when the filaments actin and myosin interact with each other.
Thus Myofibrils are made primarily of (A) actin and myosin.
Answer: true
Explanation:
Organisms within a population must compete for resources to survive. T: The least-equipped organisms may not survive. ... -A process by which an organisms better adapted to their environment tend to survive, reproduce, increase in number, and pass their traits to succeeding generations.
Answer:
the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
Explanation:
A.True
a healthy diet provide the nutrition that you need
<span>A substance<span> is a pure form of matter that contains only one type of atom or molecule. It can be further divided into two sub-categories: elements and compounds.</span> The types of substances that most readily diffuse through a cell membrane, however, are the nonpolar and small <span>polar molecules like carbon dioxide and <span>oxygen. These two </span>molecules<span> simple diffusion of water through the membrane thru a process known as osmosis.</span></span></span>
