Answer:
Answers are explained below...
Explanation:
1. A muscle fiber is composed up of myofibrils that contain an arrangement of sarcomeres (A sarcomere is the basic contractile unit of a myofibril...)
Moreover a sarcomere also contains actin and myosin filaments for relaxation and contraction of a muscle as a whole.
2. The motor unit of a muscle is composed up of a neuron called as motor neuron (you can guess by it's name that it serves some motor function). The axonal endings of a motor neuron are embeded in a muscular fiber. A series of nerve impulses control the action of muscle.
Sorry because of time limit...
Answer:
1) pathway taken by water
water is absorbed from the soil, through the root hair cells and is transported by the xylem vessel up the stem to the leaf and/or flowers. From the leaf, some water is lost to the atmosphere as vapors escape out through the stoma present in the lower epidermal layer of the leaves.
2) water potential gradient
water potential refers to the concentration of water present. A gradient forms when there is a difference between the concentrations of water in two regions separated by a partially permeable membrane.
Hence, water moving down a water potential gradient means that it goes from a region of high water potential to a region of low water potential.
3) There are tiny openings on the lower side of the leaves called as stomata (plural: stoma) that allow for gaseous exchange to occur. These openings are controlled by guard cells which are open during the day and close during the night.
Hope that answers the question, have a great day!
A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon- containing chemical compound for an indefinite period.
Answer:
A. Helicase
Explanation:
Two replication forks are formed by the opening of the double-stranded DNA at the origin, and helicase separates the DNA strands, which are coated by single-stranded binding proteins to keep the strands separated. DNA replication occurs in both directions
Answer:
If the liver is placed in an acidic solution, then the reaction rate will decrease.