Arthropods have an exoskeleton made of

chitin

cellulose

silica

cartilage

chitin

Explanation:

An arthropod is an invertebrate animal that exhibit an exoskeleton that can be define as an external outer covering of the animals. The exoskeleton in the arthropods is made up of chitin. The hard outer exoskeleton plays many roles like it provides the protection to the animal against the predator, any environmental hazard and it is waterproof which means it does not allow the entrance of external water inside the body cover of the animal.

interphase   is the cell cycle stage in which the cell acquires nutrients, creates and uses proteins and other molecules and starts the process of cell division by replicating the dna. it is the longest stage in the eukaryote cell cycle.

the following   can go wrong during interphase:   a base pair could be mismatched during the duplication process causing a mutation.   correct answer: c

explanation:

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: