Brittle Stars belong to which class of Echinoderms?

The minerals and collagen found in bone provide the strength to protect organs and tissues.  What major theme of biology does it represent?

Arthropod appendages are adapted for all of the following except:

With type I diabetes, the cells in the pancreas do not produce enough insulin (a hormone) to lower glucose levels in the blood. What major theme of biology does it represent?

Please read the following scenario to answer the following questions.While radioactive isotopes are used in medicine to identify tumors and other diseases, they can also be used to treat diseases such as cancer. One method to treat cancerous tumors is to expose them to radiation which can kill the cancerous cells and the tumor. In 2013, the U.S. Food and Drug Administration approved a new cancer treatment based on the radioactive isotope radium-223; this isotope has a half-life of 11.4 days. The radioactive drug, known as Xofigo®, is injected into the patient’s bloodstream and travels to certain regions of the body. Because it emits high-energy radiation over short distances, it can kill cancerous cells in the sites where it localizes.After the drug was injected into a person, the following data were collected regarding the amount of radiation measured in different organs in the person’s body. Organ Measured radiation Brain 0.37 Liver 11.01 Bones 4262.60 Lungs 0.27 Urinary bladder 14.90 Which of the following would be the best experiment to determine whether this drug is an effective treatment option for cancer patients?

The respiratory organs of most marine forms of the arthropods are:

The first pair of appendages on a spider is modified fangs called:

Sea Urchins and Sand Dollars belong to which class of Echinoderms?

Beetles belong to which of the following orders of Insecta?

This class of molluscs includes Nautilus, Squid and Octopus: