<span>The major function of bone marrow is to generate blood cells and the red is found in flat bones like the hip.</span>
What are the choices....I would say the sea because I really don't understand what your trying to ask
The correct answer is - accident.
In general, the invasive species are introduced into a new environment accidentally.This means that they have not been introduced on purpose, or in order to cause any harm to the ecosystem, though there are some exceptions.
The invasive species are usually very dangerous to the local ecosystem. The reason for that is that they usually do not have predators in the new ecosystem, or if they are the predators, than the local flora and fauna do not have defense mechanisms to cope with it. They also act very aggressively, have more offspring, as well as having the offspring on much shorter periods of time, which ends in occupying the space of the local organisms and even leading to their extinction.
Answer:
homologous traits
Explanation:
Cladistics is defined as a method of analyzing the evolutionary relationships between groups of living beings, aiming to elucidate their genealogy.
Although its use among researchers exceeds 50 years, it is only in the last 20 years that its use has become popular, almost worldwide. Researchers often use homologous traits to use cladistics to search for research completion. The cladistics is based on the fundamental principle that the classification of organisms must be made according to their evolutionary relationships and that the way to elucidate these relationships is by analyzing what is referred to as ancestral characters, or "primitive", and derived, or "evolved" characters.
The nerve impulses from the central nervous system cause the muscles in the human body to contract. When an impulse reaches the muscle fibers of a motor unit, it stimulates a reaction in each sarcomere that are located in between the myosin and the actin filaments.This reaction initiates a contraction. The head of the myosin filament reach forward and attach to the actin filament, pulling the actin towards the center of the sarcomere; this results in the shortening of the sarcomere. When the muscle is stimulated to contract by the nerve impulse, the calcium channel in the sarcoplasmic reticulum will be opened and calcium ions will be released into the sarcoplasm. Some of the released calcium will attach to troponin, this will cause a change in the muscle cells which move tropomyosin out of the way so that the cross bridge can link up and produce muscle contraction using ATP as energy source.