Question

Nematodes and arthropods both _____. nematodes and arthropods both _____. have ciliated larvae grow by shedding their exoskeleton are suspension feeders develop an anus from the blastopore (pore) formed in the gastrula stage

Answer 1

Nematodes and arthropods both grow by shedding their exoskeleton, a process known as ecdysis, characteristic of the Ecdysozoa clade to which they both belong.

Step-by-step explanation:

Nematodes and arthropods both grow by shedding their exoskeleton. These groups belong to the clade Ecdysozoa, characterized by animals having a tough external cuticle that requires periodic molting to allow for growth. Nematodes, also known as roundworms, are pseudocoelomates with a body cavity called a pseudocoel. Arthropods are coelomates with a true body cavity, and they have jointed appendages and a hard exoskeleton. Both share the process of ecdysis, during which they shed their cuticle or exoskeleton to increase in size as they grow. This is a defining feature of these groups and sets them apart from other invertebrates, such as the acoelomate flatworms.

Answer 2

The answer is C. They grow by shedding their exoskeleton. The exoskeleton as a protective layer and also acts as a leverage on which muscles act. However, the rigid nature of the exoskeleton restricts growth of size of the organisms. Therefore, for the animals to grow, they occasionally shed the exoskeleton, grow it back until the next growth spurt.