6. Which of the following statements about niches is false? A. Many different types of organisms can occupy the same niche.
B. The hermit crab uses a leftover mollusk shell as a home. His shell is part of his niche.
C. The crow is a quite adaptable organism and has a broad niche.
D. One aspect of a sloth's niche is the type of food it eats.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]