White fat functions in thermal insulation and brown fat uses lipid to generate heat.

A. Fibrocartilage; hyaline cartilage:Fibrocartilage is found in intervertebral discs, providing strong support and resistance to compression due to its dense collagen fibers. Hyaline cartilage forms the costal cartilage between ribs and the sternum, offering flexibility and smooth surfaces for joint movement.

B. Dense regular CT; fibrocartilage:Dense regular connective tissue is found in tendons and ligaments, not in intervertebral discs. Fibrocartilage, while present in discs, is not the main component of costal cartilage.

C. Hyaline cartilage; fibrocartilage:Hyaline cartilage provides structural support and smooth surfaces, but it is not the primary tissue of intervertebral discs. Fibrocartilage is not the main tissue of costal cartilage.

D. Fibrocartilage; dense regular CT:Dense regular connective tissue does not make up costal cartilage; it is primarily in tendons and ligaments. Fibrocartilage correctly describes intervertebral discs.

E. Elastic cartilage; hyaline cartilage:Elastic cartilage is found in structures requiring flexibility, such as the ear and epiglottis, not intervertebral discs. Hyaline cartilage correctly describes costal cartilage, but the first part is inaccurate.

A. G1 (gap 1):During G1, the cell grows and performs normal metabolic activities. Organelles are duplicated, but DNA replication does not occur in this phase.

B. G2 (gap 2):G2 follows DNA synthesis and involves further cell growth and preparation for mitosis, including the production of proteins needed for cell division. DNA replication has already been completed by this point.

C. S (synthesis):The S phase is dedicated to DNA replication. Each chromosome is duplicated to ensure that the resulting daughter cells receive an identical copy of the genetic material.

D. metaphase:Metaphase is a stage of mitosis, not interphase. During metaphase, replicated chromosomes align at the cell’s equatorial plane in preparation for separation.