Phylum Arthropoda and Class Malacostraca Quiz

Paired jointed appendages, rigid exoskeleton made of chitin; fused & modified segments as well as enhanced sensory organs for sight & smell.

Crayfish

When similar structures evolve from the same primitive structure.

<p>Forked; with two branches.</p> Signup and view all the answers

<p>Periodic shedding of the outer cuticle layer; molting.</p> Signup and view all the answers

<p>Sense organ of balance or equilibrium.</p> Signup and view all the answers

<p>Unbranched appendages.</p> Signup and view all the answers

<p>Shield-like plate covering the cephalothorax.</p> Signup and view all the answers

<p>A snout-like projection on the head.</p> Signup and view all the answers

<p>One of the pairs of head appendages located just posterior to the maxilla.</p> Signup and view all the answers

<p>Tiny legs for swimming.</p> Signup and view all the answers

<p>Located on the sixth segment of the abdomen; forms part of the tail fan.</p> Signup and view all the answers

<p>Store sperm from mating crayfish.</p> Signup and view all the answers

<p>Pincer-like first pair of legs; specialized for seizing and crushing.</p> Signup and view all the answers

<p>10 walking legs; 5 pairs.</p> Signup and view all the answers

<p>Chelipeds.</p> Signup and view all the answers

<p>One of the lower jaw bones in vertebrates; one of the head appendages in arthropods.</p> Signup and view all the answers

<p>A hollow, muscular organ that pumps blood throughout the body.</p> Signup and view all the answers

<p>Muscles in the stomach that allow it to grind food.</p> Signup and view all the answers

<p>A muscle that increases the angle between bones on two sides of a joint.</p> Signup and view all the answers

<p>Muscles that decrease the angle between bones on two sides of a joint.</p> Signup and view all the answers

<p>Excretory gland of crustacea located in the antennal metamere.</p> Signup and view all the answers

<p>Straight center line that runs from the stomach.</p> Signup and view all the answers

<p>Expanded ventro-lateral part of the carapace covering the gills.</p> Signup and view all the answers

<p>Sensory structures that detect air movement, vibrations, and smells.</p> Signup and view all the answers

<p>The part starting after the walking legs and extending to the end.</p> Signup and view all the answers

<p>The tail used to propel crayfish backward.</p> Signup and view all the answers

<p>The first pair of swimmerets used when mating.</p> Signup and view all the answers

<p>Above the seminal receptacle; between the 2nd pair of walking legs.</p> Signup and view all the answers

<p>Short pair of antenna for touch, taste, and equilibrium.</p> Signup and view all the answers

<p>A flat membranaceous expansion of the second maxilla used to scoop water out of the gill cavity.</p> Signup and view all the answers

<p>Fern-like structures that line the left and right sides of the carapace.</p> Signup and view all the answers

<p>Large, round, in front of the heart.</p> Signup and view all the answers

<p>Muscles that move the mandible for eating.</p> Signup and view all the answers

<p>A large balloon-like organ, bigger than the stomach and heart together.</p> Signup and view all the answers

<p>Organ that produces gametes, located behind the heart.</p> Signup and view all the answers

<p>Teeth inside the stomach for grinding food.</p> Signup and view all the answers