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Questions and Answers
Which characteristic is NOT generally associated with arthropods?
Which characteristic is NOT generally associated with arthropods?
- Segmented bodies
- Jointed appendages
- Endoskeleton (correct)
- Hard outer coverings
All arthropods undergo complete metamorphosis during their life cycle.
All arthropods undergo complete metamorphosis during their life cycle.
False (B)
Name the three life stages that arthropods go through during gradual or incomplete metamorphosis.
Name the three life stages that arthropods go through during gradual or incomplete metamorphosis.
egg, nymph, adult
The chitinized ______ of arthropods provides protection and prevents water loss.
The chitinized ______ of arthropods provides protection and prevents water loss.
Match the type of metamorphosis with its correct description:
Match the type of metamorphosis with its correct description:
Which of the following arthropod characteristics is NOT a defense mechanism against enemies?
Which of the following arthropod characteristics is NOT a defense mechanism against enemies?
Metamorphosis refers to the change in physical size of an arthropod during development, rather than changes in form or structure.
Metamorphosis refers to the change in physical size of an arthropod during development, rather than changes in form or structure.
Besides the chitinized exoskeleton, name one other defense mechanism arthropods use against their enemies.
Besides the chitinized exoskeleton, name one other defense mechanism arthropods use against their enemies.
Arthropods are found in diverse environments worldwide, demonstrating their capacity to ______, propagate, and establish colonies.
Arthropods are found in diverse environments worldwide, demonstrating their capacity to ______, propagate, and establish colonies.
Approximately what percentage of all known animals are classified as arthropods?
Approximately what percentage of all known animals are classified as arthropods?
Flashcards
Phylum Arthropoda
Phylum Arthropoda
A phylum of animals characterized by bilateral symmetry, segmented bodies, jointed appendages, and exoskeletons. Comprises 85% of known animals.
Metamorphosis
Metamorphosis
Change in form/structure during development. Some insects bypass it, newborns are mini adults.
Gradual Metamorphosis
Gradual Metamorphosis
Type of metamorphosis with egg, nymph, and adult stages. Young resemble adults, just smaller and not sexually mature.
Complete Metamorphosis
Complete Metamorphosis
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Arthropod Survival Mechanisms
Arthropod Survival Mechanisms
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Study Notes
Arthropods: Key Characteristics
- Phylum Arthropoda is a major division in the animal kingdom
- Arthropods make up 85% of all known animals
- They are bilaterally symmetrical invertebrates
- They have segmented bodies, jointed appendages, and exoskeletons
Arthropod Diversity
- Arthropods exhibit great diversity in structure, life cycle, and habits
- They vary in size, from the Atlas moth (12-inch wingspan) to the follicle mite (less than 1/250 inch)
Arthropod Lifestyles and Interactions
- Some arthropods are parasitic, while most are non-parasitic
- Many live in complex, organized environments and have symbiotic relationships
Metamorphosis in Arthropods
- Arthropods can have complicated life cycles
- Some show little morphological change during life stages
- Others undergo complete metamorphosis with egg, larval, pupal, and adult stages
- Metamorphosis is a change in form/structure during development
Types of Metamorphosis
- Gradual or incomplete metamorphosis: arthropods go through egg, nymph, and adult stages
- Young resemble adults, but are smaller and sexually immature
- Examples include cockroaches, grasshoppers, lice, and bugs
- Complete metamorphosis: arthropods go through egg, larva, pupa, and adult stages
- Great difference between immature stages and adults
- Examples include mosquitoes, flies, butterflies, moths, ants, bees, wasps, fleas, and beetles
Arthropod Habitats
- Arthropods are found in mountains, swamps, deserts, cities, and countryside
Defense Mechanisms
- Special mechanisms protect arthropods
- Chitinized exoskeletons, made of a nitrogenous polysaccharide, make the integument water-resistant
- Appendages can be lost and regenerated
- Hairs, scales, spines, and body fluids serve defensive roles
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