(Q).
You are presented with the question "If the smallest unit of an element is neutral and it loses an electron what charge is formed?" and the following answer choices:  - positive  - nucleus  - negative  - energy  - Energy.  - iron  - electrically  - uncontrolled  Now knowing that if a neutral atom loses an electron then an atom with a negative charge will be formed and atoms are the smallest units of elements, choose the best answer.
(A).
negative


(Q).
You are presented with the question "Sea creatures encased by what reproduce sexually?" and the following answer choices:  - barnacles  - refraction of light  - layers of fat  - Epidermis  - tough membranes  - ocean water  - gastropod shells  - epidermis and dermis  Now knowing that tunicates reproduce sexually and tunicates are sea creatures encased by tough membranes, reminiscent of tunics, choose the best answer.
(A).
tough membranes


(Q).
You are presented with the question "What could be used to to measure how many milliliters something is?" and the following answer choices:  - solid, liquid, gas  - A graduated cylinder  - objects that have mass  - an electron microscope  - The bending of a ray of light  - deoxyribonucleic acid  - a hydraulic system  - microscope  Now knowing that agraduated cylinder is used to measure volume of a liquid and volume is typically measured in liters or milliliters, choose the best answer.
(A).

A graduated cylinder