Random
What type of symmetry do Arthropods have?
Bilateral
What is one structure that helps an arthropod eat?
Example: Mandibles for crayfish
Detecting light and dark
Why are arthropods classified into different subphyla instead of being grouped into one large category?
There is just so much variety
What is one positive impact that arthropods have upon their ecosystems?
One positive impact arthropods have on their ecosystems is pollination, as insects like bees help plants reproduce by transferring pollen between flowers.
True or False
The Arthropoda phylum is the largest phylum in the animal kingdom.
True
DOUBLE POINTS!!!
What do Mollusks have instead of blood?
Hemolymph
What are antennas used for?
Smell and Taste
Which subphylum contains organisms with many body segments and numerous legs, such as centipedes and millipedes
Myriapoda
Do arthropods have an open or a closed circulatory system? How does this circulatory system work?
Arthropods have an open circulatory system. In this system, the heart pumps blood (hemolymph) into body cavities where it directly bathes the organs, and the fluid then returns to the heart through openings called ostia.
What are the three common features of arthropods?
Exoskeleton; jointed appendages; segmented body
Which tagmata does a Centipedes have?
Head, Truck Segments
What are Green Glands used for ?
Get rid of waste
How do the body structures of Chelicerata differ from those of Crustacea?
Chelicerata lack antennae and have chelicerae instead of mandibles.
Crustacea have two pairs of antennae, mandibles, and are usually aquatic.
How does the phylum name “Arthropoda” fit the animals included within the phylum?
The name Arthropoda means “jointed legs,” which describes animals in this phylum that have jointed appendages.
Make a list of 3 arthropods from different sub phylums
Example: Spiders, Lobster, Bees
What is the exoskeleton of an arthropod made out of?
Chitin
What are Statocyts used for?
Detecting gravity and motion, used for balance
Which subphylum of arthropods includes insects, and what features distinguish this group from other arthropods?
Hexapoda
Distinguishing features include six legs, three body segments (head, thorax, abdomen), and often wings.
Some arthropods undergo direct development. Other arthropods undergo indirect development. What is the difference between these two processes and what is an example of an arthropod that does each process?
Direct development occurs when young arthropods look like smaller versions of the adults and grow by molting, such as spiders. Indirect development involves distinct larval stages and metamorphosis before reaching adulthood, such as butterflies.
Are Arthropods Diploblastic or Triploblastic?
Are Arthropods protostomes or deuterostomes?
Are Arthropods Celomates, Pseudocoelomates, or Acelomates?
They are triploblastic protostomes that are coelomates
Which tagmata does a Mosquitos have?
Head, Thorax, Abdomen
What are Malpighian tubes used for?
Excrete Waste
What are the main subphyla of Arthropoda, and what is one defining characteristic of each?
Chelicerata – Have chelicerae (fang-like mouthparts); no antennae (e.g., spiders, scorpions)
Crustacea – Mostly aquatic; two pairs of antennae (e.g., crabs, shrimp)
Myriapoda – Many body segments and legs (e.g., centipedes, millipedes)
Hexapoda – Three body segments and six legs (e.g., insects)
All arthropods have an exoskeleton. What are the 2 disadvantages of this structure? How do arthropods overcome these disadvantages?
Two disadvantages of an exoskeleton are that it does not grow with the animal and it can limit body size and flexibility. Arthropods overcome these disadvantages by molting (shedding the old exoskeleton and forming a larger one) and by having jointed appendages that allow movement despite the hard outer covering.