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Questions in biology

[Answered] In which of the following skin layers are new epidermal cells produced? A. Dermis B. Stratum corneum C. Subcutaneous layer D. Stratum basale

[Answered] All states screen for the following disorders. Which condition is an inherited disorder caused by genetic mutation that affects the transport of chloride across cell membranes? A. Congenital hypothyroidism. B. Galactosemia. C. Phenylketonuria. D. Cystic fibrosis.

[Answered] Which of the following best describes a malignant tumor? A. Can invade and destroy adjacent structures B. Cannot cause death C. Does not invade surrounding tissues D. Limited to its site of origin

[Answered] What process provides many B cells and T cells that are activated against specific antigens? Multiple Choice A. Opsonization B. Antigen expression C. Antigen presentation D. Clonal expansion

[Answered] Which describes the bacterial nucleoid region? A. Bacterial DNA surrounded by a membrane B. A structure used in bacterial movement C. A region where the bacterial DNA is located in the cell. D. A structure responsible for the exchange of genetic material between two bacteria.

[Answered] What happens during crossmatching if a potential donor's blood is compatible with the blood of an individual who needs a transfusion? A. Agglutination B. Partial agglutination C. Minor agglutination D. No agglutination

[Answered] Which process involves antibodies coating microorganisms in order to facilitate phagocytosis? A. Agglutination B. Complement fixation C. Opsonization D. Anamnestic response

[Answered] The use of which of the following is not an agricultural practice that benefits soil microorganisms? A. crop rotation B. monoculture C. companion planting D. cover crops

[Answered] Which of the following is not one of the color-opponent pairs coded by the visual system? A. Red versus blue B. Blue versus yellow C. Red versus green D. Black versus white E. All of these are color-opponent pairs.

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?