The basic unit of living things is the:

Correct Answer: B

Rationale: The cell is the basic unit of life, capable of all life processes (e.g., metabolism), unlike atoms (A, non-living), organs (C, multiple tissues), or tissues (D, cell groups). From single-celled organisms like bacteria to human neurons, cells are anatomy's starting point, housing organelles that sustain life, making B the clear answer.

Correct Answer: D

Rationale: Proximal means closer to a limb's attachment (e.g., elbow to shoulder), unlike anterior (A, front), distal (B, farther), or medial (C, midline). In anatomy, this term maps limb structures, vital for describing positions like the proximal femur near the hip.

Correct Answer: A

Rationale: Ipsilateral means same side (e.g., right arm and leg), unlike anterior (B, front), contralateral (C, opposite side), or peripheral (D, outer). This anatomical term aids in mapping unilateral relationships, critical for clinical descriptions like nerve pathways.

Correct Answer: C

Rationale: Popliteal names the back of the knee, unlike femoral (A, thigh), patellar (B, kneecap), or crural (D, leg). This term's precision in anatomy aids in describing areas like popliteal artery locations, making C correct.

Correct Answer: C

Rationale: The frontal (coronal) plane divides anterior (front) and posterior (back), not sagittal (B, left-right) or transverse (implied). A and C overlap terms, but C alone is standard. This plane's use in anatomy, like frontal brain sections, makes it correct.