(Q).
If if the smallest unit of an element is neutral and it loses an electron a negative charge is formed, then if the smallest unit of an element is neutral and it loses an electron what charge is formed?  Answer choices: - positive  - nucleus  - negative  - energy  - Energy.  - iron  - electrically  - uncontrolled
(A).
negative


(Q).
If sea creatures encased by tough membranes reproduce sexually, then sea creatures encased by what reproduce sexually?  Answer choices: - barnacles  - refraction of light  - layers of fat  - Epidermis  - tough membranes  - ocean water  - gastropod shells  - epidermis and dermis
(A).
tough membranes


(Q).
If agraduated cylinder is used to measure milliliters, then what could be used to to measure how many milliliters something is?  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
(A).

A graduated cylinder