Final answer:
The statement is true as vertebrates have complex mechanosensory organs like Merkel's disks and Meissner's corpuscles for detecting touch and other tactile stimuli.
Step-by-step explanation:
The statement "Vertebrate tactile receptors are grouped into complex mechanosensory organs" is true. Tactile receptors such as Merkel's disks, Meissner's corpuscles, Ruffini endings, and Pacinian corpuscles are examples of specialized mechanoreceptors found in the skin of vertebrates. These receptors are indeed complex structures that enable the detection of various types of touch, from light touch and texture to vibration and pressure. Merkel's disks are found in the upper layers of skin and respond to light touch, while Meissner's corpuscles, also close to the surface, detect touch and low-frequency vibration. Ruffini endings, which detect stretch and deformation in joints, and Pacinian corpuscles, which sense transient pressure and high-frequency vibration, are located deeper in the skin.