#1
What type of circulatory system do arthropods have?
Open circulatory system
ExplanationArthropods have a circulatory system where the blood is not always contained within vessels.
#2
How do insects breathe?
Through spiracles and tracheal tubes
ExplanationInsects breathe by taking in air through openings called spiracles, which lead to tracheal tubes for gas exchange.
#3
What is the primary role of the exoskeleton in arthropods?
Protection and support
ExplanationThe exoskeleton provides structural support and protects arthropods from physical harm.
#4
In arthropods, what is the process called that involves shedding of the exoskeleton to allow for growth?
Both b and c are correct
ExplanationArthropods undergo molting or ecdysis, shedding their exoskeletons to grow.
#5
What type of eyes do most insects have?
Compound eyes
ExplanationMost insects have compound eyes composed of multiple individual visual units called ommatidia.
#6
What mechanism do arthropods use to grow in size?
Molting or ecdysis
ExplanationArthropods grow by periodically shedding their exoskeletons through a process called molting or ecdysis.
#7
What type of reproductive strategy is most common among arthropods?
Sexual reproduction
ExplanationMost arthropods reproduce sexually, involving the fusion of gametes from two parents.
#8
Which of the following is a unique feature of arachnid physiology?
Book lungs
ExplanationArachnids have respiratory organs called book lungs for gas exchange.
#9
Which of the following structures is involved in the excretion and osmoregulation in many arthropods?
Malpighian tubules
ExplanationMalpighian tubules are involved in removing metabolic wastes and regulating water balance in arthropods.
#10
Which of the following best describes the function of hemolymph in arthropods?
Nutrient distribution and waste removal
ExplanationHemolymph in arthropods serves as a medium for transporting nutrients and removing waste products.
#11
Arthropods exhibit various types of locomotion. Which of the following is NOT a form of locomotion used by arthropods?
Slithering
ExplanationArthropods do not typically slither; common forms of locomotion include walking, flying, and swimming.
#12
Which of the following sensory organs are highly developed in insects for detecting chemical signals?
Antennae
ExplanationInsects have highly sensitive antennae used for detecting chemical signals, such as pheromones.
#13
Which of the following is a common method of defense or camouflage used by arthropods?
All of the above
ExplanationArthropods employ various defensive strategies, including mimicry, camouflage, and chemical defenses.
#14
How do crustaceans, a subgroup of arthropods, primarily breathe?
Through gills
ExplanationCrustaceans typically respire through gills, extracting oxygen from water.
#15
What adaptation allows some aquatic arthropods to survive in oxygen-poor water?
Plastron respiration
ExplanationAquatic arthropods can trap a layer of air around their bodies, known as plastron respiration, to obtain oxygen from water.
#16
Which group of arthropods is known for having a 'tagmata' body organization?
All of the above
ExplanationVarious arthropods, including insects, arachnids, and crustaceans, exhibit tagmata, which are specialized body segments.
#17
What is the primary function of the Johnston's organ in insects?
Hearing
ExplanationJohnston's organ in insects primarily functions in detecting sound vibrations, facilitating hearing.
#18
What process do most arthropods use to regulate their internal water balance and excrete metabolic wastes?
Filtration and reabsorption
ExplanationMost arthropods regulate internal water balance and excrete wastes through filtration of hemolymph and reabsorption of useful substances.