Arthropods Flashcards

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Questions and Answers

What are basic characteristics that all or most Arthropods share?

All Arthropods are invertebrates, have an exoskeleton, segmented bodies, jointed appendages, bilateral symmetry, open circulatory system, one-way digestive system, most reproduce sexually, and most have antennas.

What are the four groups of Arthropods?

The four groups of Arthropods are crustaceans, arachnids, centipedes and millipedes, and insects.

What is an exoskeleton?

An exoskeleton is an outer shell or skeleton.

What are two advantages of having an exoskeleton?

<ol> <li>It protects the body. 2. It prevents water from evaporating so the insect does not dry out.</li> </ol> Signup and view all the answers

What are two disadvantages of having an exoskeleton?

<ol> <li>It limits movement. 2. It has to lose its shell and regrow a new shell in order to grow.</li> </ol> Signup and view all the answers

What is molting?

Molting is a process of shedding an outgrown exoskeleton and growing a new one that is larger. Signup and view all the answers

Which group of Arthropods does not have antennas?

Arachnids. Signup and view all the answers

What is the advantage of having a jointed appendage?

An advantage of having jointed appendages is that it allows them to move easier with their exoskeleton. Signup and view all the answers

What is a swimmeret?

Swimmerets are like flippers used for swimming. Signup and view all the answers

What is a cheliped?

The cheliped is used to capture food and defend the crustacean. Signup and view all the answers

Which group of arthropods are these associated with?

Crustaceans. Signup and view all the answers

How do crustaceans breathe?

Crustaceans breathe with gills, and they diffuse oxygen in the air into moisture. Signup and view all the answers

Do crustaceans go through a metamorphosis?

True Signup and view all the answers

Name four types of arachnids that we studied.

Four types of arachnids are spiders, mites, ticks, and scorpions. Signup and view all the answers

What are the similarities and differences between a mite and a tick?

Mites are microscopic, unarmed hypostome, eat plants, fungi, and other things. Ticks are macroscopic, toothed hypostome, always feed on blood. They both suck blood and carry parasites. Signup and view all the answers

Why can scorpions survive in harsh climates?

Scorpions can live in harsh climates because their metabolism can slow down to one third of its typical rate, and most can live on one insect per year. Signup and view all the answers

What is one difference between centipedes and millipedes?

Centipedes have one pair of legs per segment, but millipedes have two pairs of legs per segment. Signup and view all the answers

What are the three sections of an insect's body called?

The three body sections are called the head, the thorax, and the abdomen. Signup and view all the answers

To which body section of an insect's body do the legs attach?

The legs attach to the thorax. Signup and view all the answers

How many stages do insects go through during a complete metamorphosis?

Insects go through four stages during a complete metamorphosis. Signup and view all the answers

What is the name of each stage during a complete metamorphosis?

<ol> <li>Egg 2. Larva 3. Pupa 4. Adult</li> </ol> Signup and view all the answers

What is a gradual metamorphosis?

A gradual metamorphosis is when an insect only goes through three distinct changes. Signup and view all the answers

How is a gradual metamorphosis different from a complete metamorphosis?

A gradual metamorphosis goes through three distinct changes, and a complete metamorphosis goes through four changes. Signup and view all the answers

Give an example of an animal that goes through a complete metamorphosis.

A butterfly goes through a complete metamorphosis. Signup and view all the answers

Is a nymph part of a complete or a gradual metamorphosis?

False Signup and view all the answers

Give an example of an animal that goes through a gradual metamorphosis.

Termites go through a gradual metamorphosis. Signup and view all the answers

Study Notes

Basic Characteristics of Arthropods

Arthropods are invertebrates with an exoskeleton and segmented bodies.
Possess jointed appendages and exhibit bilateral symmetry.
Have an open circulatory system and a one-way digestive system.
Most reproduce sexually and possess antennas.

Groups of Arthropods

Four primary groups: crustaceans, arachnids, centipedes and millipedes, insects.

Exoskeleton

Serves as an outer shell, providing protection and preventing water loss.
Two main advantages: body protection and moisture retention.

Disadvantages of Exoskeleton

Limits movement and requires molting to grow, necessitating shedding and regrowth.

Molting

The process of shedding an old exoskeleton to accommodate growth.

Arachnids

Unique among arthropods for lacking antennas.

Jointed Appendages

Jointed appendages enhance mobility despite the presence of an exoskeleton.

Crustacean Adaptations

Swimmerets function like flippers for swimming.
Chelipeds are used for capturing food and defense.

Breathing in Crustaceans

Utilize gills for respiration, diffusing oxygen in moisture.

Metamorphosis in Crustaceans

Most undergo metamorphosis during their life cycle.

Types of Arachnids

Includes spiders, mites, ticks, and scorpions.

Mites vs. Ticks

Mites are microscopic and primarily eat plants and fungi; ticks are macro-sized and feed on blood.
Mites have a soft exoskeleton, while ticks possess a harder exoskeleton.

Scorpion Resilience

Survive harsh conditions by slowing metabolism, requiring minimal food, and regulating oxygen intake.

Differences in Legs

Centipedes have one pair of legs per segment; millipedes have two pairs per segment.

Insect Body Structure

Three sections: head, thorax, and abdomen.
Legs attach to the thorax.

Insect Metamorphosis

Complete metamorphosis involves four stages: egg, larva, pupa, and adult.
Gradual metamorphosis consists of three distinct changes.

Example of Metamorphosis

Butterflies undergo complete metamorphosis, while termites exhibit gradual metamorphosis.
Nymphs are associated with gradual metamorphosis.

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Description

Explore the fascinating world of Arthropods with these flashcards. Learn about their basic characteristics, the main groups they are divided into, and their unique features. Ideal for students looking to enhance their knowledge of this diverse animal phylum.