Answer:
SA node
Explanation:
The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.
Artificial reproductive technologies can be used to solve fecundation problems and also health problems occurred during the gestational process.
<h3>What are artificial reproductive technologies?</h3>
Artificial reproductive technologies are any type of medical technology aimed at providing solutions to gestation when there are problems associated with this biological process.
Artificial reproductive technologies include, among other techniques, in-vitro fecundation, zygote intrafallopian transference, frozen embryo transference, etc.
In conclusion, Artificial reproductive technologies can be used to solve fecundation problems and also health problems occurred during the gestational process.
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Answer;
-Vertical relationship
Explanation;
-Vertical relationships are up down relationships between superiors and inferiors, the only way this relationship is valid is if it is educational and the person on top has more wisdom and knowledge than the person on the bottom.
-Vertical relationships use feminine communication rituals where the subordinate must be pleasant and must not communicate negative emotional data to the superior.
-Horizontal relationships on the other hand, are democratic educational relationships between people that are relatively equal in knowledge, wisdom, or technique.
Evidence for evolution, in other words evidence of common descent, include fossils, which have shown a (fairly) steady change in morphology over time for some species. An example would be horse hooves: we have fossils that show when they were still three toed, then two toed, then one toe in our present day horses. Another piece of evidence is vestigial organs. An example of vestigial organs is wings in some flightless birds, such as the kiwi. Their ancestors used it in order to fly across the marine barrier into New Zealand, but natural selection and random genetic drift made them quickly lose the ability to fly. Nonetheless, they still have their wings, however small. It can be assumed that eventually, their wings would be reduced to small stubs fused to other nearby bones, as has been observed in their cousins.
Answer:Antibiotics are powerful medicines that fight bacterial infections. They either kill bacteria or stop them from reproducing, allowing the body's natural defenses to eliminate the pathogens. Used properly, antibiotics can save lives. But growing antibiotic resistance is curbing the effectiveness of these drugs.
Explanation:
