Q: Q: Snake venom may join the class of drugs collectively known as thrombolytic agents, which can help speed up the degradation of an abnormal what? Read this paragraph and choose the correct option from the provided answers: on a daily basis as a preventive measure. However, aspirin can also lead to serious side effects, including increasing the risk of ulcers. A patient is well advised to consult a physician before beginning any aspirin regimen. A class of drugs collectively known as thrombolytic agents can help speed up the degradation of an abnormal clot. If a thrombolytic agent is administered to a patient within 3 hours following a thrombotic stroke, the patient's prognosis improves significantly. However, some strokes are not caused by thrombi, but by hemorrhage. Thus, the cause must be determined before treatment begins. Tissue plasminogen activator is an enzyme that catalyzes the conversion of plasminogen to plasmin, the primary enzyme that breaks down clots. It is released naturally by endothelial cells but is also used in clinical medicine. New research is progressing using compounds isolated from the venom of some species of snakes, particularly vipers and cobras, which may eventually have therapeutic value as thrombolytic agents. Choices: - brain - bleed - bone - clot A:
A: clot

Q: Q: There are how many visual clues to indicate a chemical reaction? Read this paragraph and choose the correct option from the provided answers: chemical reaction: Involves a transfer of energy. There are four visual clues to indicate a chemical reaction. Choices: - three - five - seven - four A:
A: four

Q: Q: What can damage animal tissues? Read this paragraph and choose the correct option from the provided answers: Choices: - wind erosion - nervous stress - acid and water exposure - extreme pressure or temperature A:
A: extreme pressure or temperature

Q: Q: One of the main features all vetebrates have in common is what? Read this paragraph and choose the correct option from the provided answers: Vertebrates. From the smallest of fish to us. One of the main features we all have in common is our backbone. The Vertebrates chapter describes the biological features of fish, amphibians, reptiles, birds, and mammals. Choices: - hard shell - brain - skeleton - backbone A:
A: backbone