Select all that apply. which of the following are part of the body's first line of defense against pathogens? hair nails skin mucous membranes saliva

Skin, mucous membranes.

Explanation:

Without scratches or open wounds, your skin is easily a first line of dense. Mucous membranes line various parts of your body, like your nose and eyes, and ar often covered in ‘secretions” to helip fight against microorganisms and pathogens. Hope this helps!!

the answer is a) a shiprock was formed by igneous process

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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