Answer: Layer a is 500 million years old.
Explanation:
Trilobite is a member of the group of extinct arthropods found as fossils and they can be identified by the three-lobed as well as three segmented forms. These were the marine animals. These were appeared initially in the Cambrian Period. They used to live 542 million years ago so the fossils can be estimated to be aged of 500 above years old. These animals used to dominate in the sea area.
Explanation:
Temprature:the body must maintain a relatively constant temperature if it gets to hot the body employees vasodilation to cool down this delites the blood vessels allowing more heat to escape from them through the skin
Glucose: the body must regulate glucose levels to stay healthy. When glucose levels become to high the body realeases a hormone called an insulinwhen they become to low the body converts the glocogenin the blood to glucose
Toxins :in the blood can distrupt the body's homeostasis thus it signals the urinary system to ensure that the toxins are excreated
I’m sorry can u translate it to english!
Answer:
A. prophase, metaphase, anaphase, and telophase
Explanation:
Answer:
Heres a link to a labeled diagram of the heart. Sorry I was trying to put a picture in but It wouldn't save as a JPEG file
Link:
https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjpw8LI4vzlAhVMPn0KHWHnCTkQjRx6BAgBEAQ&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFile%3ADiagram_of_the_human_heart_(cropped).svg&psig=AOvVaw2LsD24TXBtoTcH1kjWCRJC&ust=1574476068782790
