Which of the following statements is TRUE regarding science? I- Science is led by evidence.
II- Science is based on facts and so, it cannot change at all.
III- Science cannot answer questions of meaning and value.
IV- Sciences is based on facts and so, it can explain everything.

A. I & III
B. II & III
C. III & IV
D. I, II & III

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

How does the nervous system affect the excretory system?