Our skin protects us against _____

UV rays from the sun
trauma
disease-causing agents
all of the above


D. all of the above

Biology & Microbiology

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For water to be considered safe to drink, it MUST be treated with four distinct methods

Indicate whether the statement is true or false.

Biology & Microbiology

Echinoderms often have an important ecological effect on their environment. Provide at least 2 examples of their effects in particular locations

What will be an ideal response?

Biology & Microbiology

The fluctuation in blood pressure shown in section I is caused by the

a. systole-diastole cycle b. the atrial contraction-atrial relaxation cycle c. comparison of pressure in the artery to pressure in the corresponding vein d. tidal breathing rate of the subject e. rhythmic contraction of the veins

Biology & Microbiology

An opening in the epidermis of the leaf through which water evaporates is called a

A) stoma. B) plasmodesmata. C) guard cell. D) pit. E) sieve plate.

Biology & Microbiology