Certain parasites, such as intestinal tapeworms, cannot survive outside of the host. Why are they still considered alive?
A) Survival outside of a host is not a requirement for life.
B) They are still considered alive because they are studied by biologists, and biology is the study of life.
C) As long as they are made of cells, they are considered to be alive.
D) Because they cannot survive outside of the host, parasites are not considered alive.
A
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A. chitins B. mycelia C. lichens D. hyphae
Which of the following best describes the correct sequence of events involved in hemostasis?
A) vascular spasm, platelet plug, production of thrombin, production of fibrin B) production of fibrin, platelet plug, vascular spasm, conversion of prothrombin to thrombin C) vascular spasm, platelet plug, conversion of prothrombin to fibrin D) platelet plug, production of thrombin, production of fibrin, vascular spasm E) vascular spasm, conversion of calcium ions to thrombin, platelet plug, production of fibrin
Identify all of the symptoms associated with diabetes.
A. Lack of energy B. Swollen lymph nodes C. Unintended weight loss D. Persistent thirst
Which of the following correctly shows the order of the phases in the generation of life on Earth?
a. Development of membranes, formation of small organic molecules, formation of self-replicating informational molecules b. Development of membranes, formation of self-replicating informational molecules, formation of small organic molecules c. Formation of self-replicating informational molecules, development of membranes, formation of small organic molecules d. Formation of self-replicating informational molecules, formation of small organic molecules, development of membranes e. Formation of small organic molecules, formation of self-replicating informational molecules, development of membranes