Ceruminous glands secrete:

 

It is part of the rib cage and serves as an attachment site for some abdominal muscles.

Choice A is wrong because the hyoid bone is a U-shaped bone located in the neck, above the larynx. It does not articulate with any other bone and supports the tongue and laryngeal muscles.

Choice B is wrong because the ossa coxae are the hip bones that form the pelvic girdle. They are composed of three fused bones: ilium, ischium and pubis.

Choice C is wrong because sesamoid bones are small, round bones that are embedded in tendons.

They protect the tendons from wear and tear and increase their leverage. The most common sesamoid bone is the patella (kneecap).

The correct answer is choice D. Dermal papillae. Dermal papillae are the projections of the dermis that create the ridges and grooves on the surface of the skin, which are responsible for fingerprints.

Choice A is wrong because Merkel cells are touch receptor cells located at the tip of the epidermal ridges, not the dermal papillae.

Choice B is wrong because arrector pili are smooth muscles attached to hair follicles, which cause goose bumps when contracted, not fingerprints.

Choice C is wrong because sudoriferous glands are sweat glands that secrete fluid onto the skin surface, not fingerprints.

The correct answer is choice C. Hinge.

The elbow joint is a synovial joint that allows for flexion and extension of the forearm. It is classified as a hinge joint because it permits movement in only one plane (uniaxial).

Choice A. Saddle is wrong because a saddle joint allows for movement in two planes (biaxial), such as the joint between the trapezium carpal bone and the first metacarpal bone at the base of the thumb.

Choice B. Pivot is wrong because a pivot joint allows for rotational movement around a single axis, such as the joint between the atlas and axis vertebrae.

Choice D. Ball and socket is wrong because a ball and socket joint allows for movement in three planes (multiaxial), such as the joint between the humerus and scapula at the shoulder.

The correct answer is choice C. DNA. DNA carries the genetic information in the cells of all living organisms. It contains codes for the assembly of amino acids into all the proteins required in the body. The sequence of bases in a DNA molecule can determine the order of amino acids in a protein molecule. Groups of three bases called codons represent different amino acids. This is the basis of the genetic code.

Choice A is wrong because mRNA is a type of RNA that carries the genetic information from DNA to the ribosomes, where protein synthesis takes place.

mRNA is not the original carrier of the genetic code, but a messenger that transfers it.

Choice B is wrong because tRNA is a type of RNA that brings amino acids to the ribosomes, where they are joined together to form proteins. tRNA has a complementary sequence to mRNA, called an anticodon, that allows it to pair with the correct codon on mRNA.

Choice D is wrong because chromosomes are structures made of DNA and proteins that contain many genes.

Chromosomes are not the carriers of the genetic code, but the structures that organize and store it.

Choice E is wrong because nucleotides are the building blocks of DNA and RNA. Nucleotides are composed of a nitrogenous base, a sugar, and a phosphate group.

Nucleotides are not the carriers of the genetic code, but the units that make up the code.