Exoskeleton
A)an outer covering that supports the soft inner tissues in an arthropod
B)an ocean invertebrate having spiny skin
C)an animal having no backbone
D)an invertebrate animal with jointed legs and an exoskeleton
E)an invertebrate animal that has tentacles around its mouth
D)an invertebrate animal with jointed legs and an exoskeleton
The main part of the mollusk's body is called the _____ mass.
crust
tail
polyp
visceral
medusa
visceral
The correct answer is D) an invertebrate animal with jointed legs and an exoskeleton.
To figure out the correct answer, let's break down the given options.
A) an outer covering that supports the soft inner tissues in an arthropod:
This option describes an exoskeleton, but it doesn't mention anything about jointed legs, which is a defining characteristic of exoskeletons.
B) an ocean invertebrate having spiny skin:
This option describes a marine animal with spiny skin, but it doesn't specifically mention an exoskeleton or jointed legs.
C) an animal having no backbone:
This option describes a creature without a backbone, which could include a wide range of creatures, including some with exoskeletons, but it doesn't specifically mention jointed legs.
D) an invertebrate animal with jointed legs and an exoskeleton:
This option accurately describes an exoskeleton, as well as the presence of jointed legs, which are key characteristics of arthropods.
E) an invertebrate animal that has tentacles around its mouth:
This option describes an animal with tentacles around its mouth, which may be referring to a different type of invertebrate, like a cephalopod, but it doesn't specifically mention an exoskeleton or jointed legs.
Therefore, based on the given options, the correct answer is D) an invertebrate animal with jointed legs and an exoskeleton.