Dodder is a parasitic plant which has A. HAUSTORIAL ROOTS for support and absoption of nutrients from the host plant.
Dodder can not live alone. It grows from a seed and sprout from the ground but if it does not find a host within 10 days, it will die.
When the Dodder finds its host, it twines itself in a counter-clockwise direction around the stem of its host. The Dodder stem has bumps called "haustoria". These bumps are tightly pressed against the stem of the host plant and said bumps will eventually push their way inside the hosts' stem to pull the nutrients it needs to survive to the detriment of the host plant.
Dodder plant may be parasitic but it does not kill its own host instead it causes the growth of the host to be stunted.
Answer:
I, II, III
Explanation:
A threshold stimulus is a stimulus that is capable to produce a response in excitable tissues such as neurons and muscle fibers. At threshold potential, the outward movement of K+ and inward movement of Na+ become equal to each other. When the potential exceeds the threshold potential, more and more Na+ enter the cell to depolarize it and to allow the opening of Na+ channels. Therefore, to fire an action potential, the threshold must be exceeded.
Conduction of action potential is all or none phenomenon which means that either it occurs or it does not occur. As an impulse is passed by each successive part of an exon, it enters the refractory period during which there is no conduction of nerve impulse. It ensures the one-way conduction of impulse from the cell body to the axon terminal only.
Muscle tissue is comprised of groups of muscle cells, laid out in differing organizations depending on the muscle tissue type. For skeletal muscle tissue, the muscle tissue works together to push or pull the skeleton and move the organism conciously. For smooth muscle, the muscle tissue works together to push, pull, or constrict various structures unconciously. An example of smooth muscle is the muscles involved in pushing food through the esophagus. For cardiac muscle, the muscle tissue works together to pump the entire heart in tandem.
Cellular respiration is the process by which glucose is transformed into ATP. -- It uses oxygen and gives off carbon dioxide and takes place in the mitochondria of the cells. -- It helps maintain homeostasis by transforming energy that can be used to do cellularwork.
The first organism in the food chain is the producer.
