Which of the following are characteristics of members of the phylum Arthropoda? Check all that apply.

Question

Quizplus · Accepted Answer

Members of the phylum Arthropoda exhibit several distinct characteristics that set them apart from other animal phyla. The correct characteristics from the options provided are:
A) Metamerism modified by tagmatization - Arthropods show a form of metamerism where their body segments are grouped into functional units called tagmata (e.g., head, thorax, abdomen). This is a modified version of the metamerism seen in annelids, where the body is divided into more or less similar segments.
B) Paired jointed appendages - One of the defining features of arthropods is their paired, jointed appendages, which can include legs, antennae, and mouthparts. These appendages are articulated, allowing for a wide range of movements.
C) Open circulatory system with blood released into a hemocoel - Arthropods have an open circulatory system where the blood (or hemolymph) is not entirely contained within vessels. Instead, it is pumped by a heart into a body cavity called the hemocoel, where it bathes the internal organs directly.
D) Collagenous cuticle - This statement is incorrect. Arthropods do not have a collagenous cuticle; instead, they have an exoskeleton made of chitin and proteins. The exoskeleton provides structural support, protection, and points of attachment for muscles. It is periodically shed and regrown in a process called molting or ecdysis to allow for growth.
Therefore, the correct characteristics of members of the phylum Arthropoda from the given options are A) Metamerism modified by tagmatization, B) Paired jointed appendages, and C) Open circulatory system with blood released into a hemocoel.

Which of the Following Are Characteristics of Members of the Phylum