Answer:
The correct answer is option B, that is, an endoskeleton evolved to enclose the dorsal nerve cord, which develops from the notochord.
Explanation:
It has been discovered that the ancestors of the modern-day fish were vertebrate chordates. The vertebrate chordates are considered to have evolved from the invertebrate chordates that are identical to the present day tunicates. It has been found that in vertebrates the endoskeleton has evolved to encompass the dorsal nerve cord that has been developed from the notochord (a characteristic of invertebrates).
Answer:
Foods are ingested by the mouth where they are chewed by the teeth and savored by the taste buds present in the tongue. In the mouth, saliva breaks down food into substances that are easier to digest. Subsequently, the pharynx allows food to be swallowed and it pushes the food into the esophagus, the contractions of the esophageal muscle allow the movement of the food through the esophagus and to the stomach where the food is mixed with the juices and are mostly digested. In the stomach nutrients are absorbed. There are particles that are not absorb and they pass to the intestine where other nutrients are transported to the blood, then pass to the large interstinum where there is water absorption and stool formation that are expelled through the rectum.
In the case of newborn twins, Brianna blood pressure is not normal but rather is low at 85/55 compared to Christophers 110/70. She has inadequate pumping of blood from her heart to the body while her breathing is rapid and deep in trying to get oxygen. It is because of inadequate pumping of blood that may lead to issues with her lungs.
Before she was diagnosed with retractile sclerosing mesenteritis, her eyes and lips were blue while her blood pressure could not read. After two weeks o her surgery, her blood pressure dropped severely low and had a breathing tube and 13 IV lines. She had caused lung damage caused by aspirations of contents in the stomach.
By third week she was in a coma but regained her physical skills and her consciousness after her last surgery (fourth).
Answer:
Endangered species are plants or animals that are near extinction. Invasive species are plants or animals that are not originally found in that ecosystem. I don't know the rest sorry. I hope this was helpful though.
Explanation:
