Four specimens are arranged on a wooden table, each labeled with a letter

Four specimens are arranged on a wooden table, each labeled with a letter. Specimen W is a green, oval-shaped cactus pad. Specimen N consists of small, mottled brown seeds in a petri dish. Specimen P presents small, pale seeds similarly displayed. Specimen K holds thin, dark strands, likely roots or plant fibers. A white magnifying glass sits beside specimen K, suggesting a close-up examination of these botanical samples.