The exterior of Ascaris is covered by
A. Pellicle
B. Epidermis
C. Sclerites
D. Cuticle
D. Cuticle
The exterior of Ascaris is covered by:
D. Cuticle
The correct answer is D. Cuticle.
To determine the answer, you can start by understanding the options given and then eliminating the incorrect ones.
A. Pellicle: A pellicle is a thin, flexible membrane-like covering found in some organisms like protozoa. Ascaris is not typically covered by a pellicle, so we can eliminate this option.
B. Epidermis: The epidermis is the outermost layer of cells found in many organisms, including humans. While Ascaris does have an outer layer known as the epidermis, it is not the main protective covering for its exterior. Therefore, we can eliminate this option as well.
C. Sclerites: Sclerites are hard, chitinous structures that are found on the outer surface of certain arthropods such as insects. Since Ascaris is not an arthropod, we can eliminate this option as well.
D. Cuticle: The cuticle is a tough, protective layer that covers the exterior of many organisms, including the body of Ascaris. It helps to prevent water loss, protect against physical damage, and serves as a barrier against harmful substances. Given this information, the correct answer is D. Cuticle.
In summary, the correct answer is D. Cuticle, which is a tough, protective covering that covers the exterior of Ascaris.