Animals that possess both male and female sexual organs
a. are parthenogenetic and typically self-fertilize.
b. are hermaphroditic and typically self-fertilize.
c. are dioecious and typically cross-fertilize.
d. are dioecious and typically self-fertilize.
e. are hermaphroditic and typically cross-fertilize.
E
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A gametophyte that develops from a ____ spore is bisexual, meaning that it can produce both sperm and eggs
a. homosporous b. polysporous c. heterosporous d. diplosporous e. bisporous
Which of the following statements regarding hypersensitivity are true? (Check all that apply.)
_____ The acceptance of self cells is known as immunological tolerance. _____ Allergies are caused by IgG secretion in response to antigens. _____ Autoreactive B cells produce autoantibodies causing inflammation. _____ Itchy welts or hives could be called a local anaphylaxis. _____ Delayed hypersensitivity is mediated by TH cells and macrophages.
This microscope produces an image of a light cell against a dark background; internal structures are not visible.
A) Compound light microscope B) Phase-contrast microscope C) Darkfield microscope D) Fluorescence microscope E) Electron microscope
What activity of the liver makes it act as an accessory organ?
A) production of bile B) synthesis of blood-clotting factors C) destruction of old blood cells D) detoxification