Why are antibodies important to immunity?
What will be an ideal response?
Antibodies attach to the surface of invaders making the pathogens less likely to attach to body cells and more likely to be removed by phagocytes. In addition IgG is one of the activators of the complement cascade.
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Insects are likely so successful because of which adaptations that allow them to live in a wide range of habitats? Select all that apply
A. desiccation-resistant eggs B. wings C. metamorphosis D. diverse feeding appendanges E. unique respiratory system of spiracles and tracheae
Which vitamins are fat soluble?
A) vitamin C B) vitamin K C) vitamin B D) vitamin A E) niacin F) vitamin D G) vitamin E
The first terrestrial animals were probably
A) reptiles. B) arthropods. C) dinosaurs. D) mammals. E) amphibians.
A researcher has performed a prospective study on a disease. To which specific kind of epidemiological study is this referring?
A) analytical B) case control C) descriptive D) experimental E) prodromal