The umbilical cord contains one umbilical vein and two arteries. Hope this helps.
<h2>Roundworms are among the most <u>numerous creatures</u> on the planet.</h2>
- Roundworms may survive for a lengthy time throughout the human gut. They can be dangerous as well as end up causing a variety of issues, including abdominal discomfort, fever, as well as <u>diarrhea</u>.
- Roundworms have long, round bodies that vary throughout the size depending on the species.
Thus the response above is right.
Learn more about roundworm here:
brainly.com/question/23560105
Answer:
When molecular hydrogen (H2) and oxygen (O2) are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide. In this oxidation, a molecule of hydrogen gas is ionized to two electrons and two protons
