Which statement is NOT true about chordates?
( A ) All chordates have notochords.
( B ) All chordates have pharyngeal pouches or gill slits.
(C ) All chordates have dorsal tubular nerve cords.
(D ) All chordates are vertebrates.
Answers
Answer:
The cartilage cells or chondrocytes are contained in cavities in the matrix, called cartilage lacunae; around these, the matrix is arranged in concentric lines as if it had been formed in successive portions around the cartilage cells. This constitutes the so-called capsule of the space. Each lacuna is generally occupied by a single cell, but during the division of the cells, it may contain two, four, or eight cells. Lacunae are found between narrow sheets of calcified matrix that are known as lamellae (/ləˈmɛli/ lə-MEL-ee).
Answer:
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