1.
How many kingdoms are there?
Correct Answer
A. 6
Explanation
The question is asking for the number of kingdoms. Among the given options, the number 6 represents the correct answer.
2.
How long have arthropods been evolving?
Correct Answer
C. 300 million years
Explanation
Arthropods have been evolving for approximately 300 million years. This is supported by fossil evidence that shows the presence of early arthropod ancestors dating back to the Paleozoic era, around 300 million years ago. These ancestors eventually gave rise to the diverse group of arthropods we see today, including insects, spiders, crustaceans, and more. The long evolutionary history of arthropods has allowed them to adapt and thrive in various environments, making them one of the most successful and abundant animal groups on Earth.
3.
About how many arthropods have been described?
Correct Answer
B. 1,000,000
Explanation
There have been approximately 1,000,000 arthropods described. This suggests that scientists have identified and documented a vast number of different species within the arthropod group, which includes insects, spiders, crustaceans, and other related organisms. The high number reflects the incredible diversity and abundance of arthropods in the natural world.
4.
How many antennae does a crustacean have?
Correct Answer
D. 2
Explanation
Crustaceans have two antennae. These appendages are used for sensing their environment, detecting food, and detecting predators. They are located on the head of the crustacean and vary in shape and size depending on the species. The antennae play a crucial role in the survival and navigation of crustaceans in their aquatic habitats.
5.
How many appendages does a crustacean have per segment?
Correct Answer
A. 2
Explanation
Crustaceans have two appendages per segment. These appendages are specialized structures that serve various functions such as locomotion, feeding, and sensory perception. The presence of two appendages per segment is a characteristic feature of crustaceans and distinguishes them from other types of arthropods.
6.
How do Crustaceans breathe?
Correct Answer
A. Gills
Explanation
Crustaceans breathe through gills, which are specialized organs that extract oxygen from water. Gills are located on the sides of their bodies and are made up of thin, feathery structures called filaments. As water passes over the gills, oxygen is absorbed into the bloodstream and carbon dioxide is released. This process allows crustaceans to extract oxygen from their aquatic environment and is essential for their survival.
7.
How many pairs of legs does a centipede have per segment?
Correct Answer
B. 1
Explanation
A centipede has one pair of legs per segment. Each segment of a centipede's body has one pair of legs attached to it. This allows the centipede to have a large number of legs, with each segment contributing one pair. Therefore, the correct answer is 1.
8.
How many pairs of legs does a millipede have per segment?
Correct Answer
A. 2
Explanation
A millipede has two pairs of legs per segment, which means it has four legs in total per segment. This is why the correct answer is 2.
9.
What do millipede's do when disturbed?
Correct Answer
C. Crawl up to a ball
Explanation
When disturbed, millipedes have a defensive behavior where they curl up into a ball. This action helps protect their vulnerable underside and exposes their hard exoskeleton, making it difficult for predators to attack or consume them. By curling up into a ball, millipedes can deter potential threats and increase their chances of survival.
10.
What are centipedes?
Correct Answer
A. Carnivores
Explanation
Centipedes are carnivores because they mainly feed on other small invertebrates such as insects, spiders, and worms. They have specialized front legs called forcipules, which they use to inject venom into their prey, immobilizing them. This venom also helps in breaking down the prey's tissues, making it easier for the centipede to consume. Additionally, centipedes have sharp jaws that allow them to tear apart their prey. Their predatory nature and feeding habits make them well-suited to survive and thrive as carnivorous creatures.
11.
Where would you find a centipede?
Correct Answer
A. Under a rock or soil
Explanation
Centipedes are arthropods that prefer dark and moist environments. They are commonly found under rocks or in soil, where they can easily hide and hunt for prey. This habitat provides them with the necessary moisture and protection they need to survive. While centipedes may occasionally be found in other locations, such as plants, it is most likely to encounter them under a rock or in soil.
12.
How many walking legs does an Arachne have?
Correct Answer
D. 8
Explanation
Arachne is a general term used to describe a class of arthropods that includes spiders, scorpions, and ticks. These creatures typically have eight legs, which allows them to walk and navigate their surroundings. Therefore, the correct answer is 8.
13.
What does Arachne feed on?
Correct Answer
C. Insects
Explanation
Arachne, commonly known as spiders, feed on insects. Spiders are carnivorous creatures that primarily rely on insects as their source of food. They use their webs or hunting techniques to catch and consume insects. They have specialized structures like fangs and venom to immobilize and digest their prey. While spiders may occasionally feed on other small creatures like crustaceans, their main diet consists of insects.
14.
What kind of lungs do they have?
Correct Answer
B. Book lungs
Explanation
Book lungs are a unique respiratory organ found in some arachnids, such as spiders and scorpions. These lungs consist of thin, leaf-like structures called lamellae, which are stacked like the pages of a book. Oxygen from the air diffuses across the surface of the lamellae and is then transported to the rest of the body. This adaptation allows arachnids to efficiently extract oxygen from the environment, enabling them to live in diverse habitats. Therefore, the correct answer is book lungs.
15.
Where can you find scorpions?
Correct Answer
C. Dry places
Explanation
Scorpions can be found in dry places because they are adapted to survive in arid environments. These arachnids have a waterproof exoskeleton that helps prevent water loss, allowing them to thrive in dry conditions. They are commonly found in deserts, rocky areas, and other arid habitats where moisture is scarce. Scorpions are nocturnal creatures and prefer to hide in crevices, under rocks, or in burrows during the day to avoid direct sunlight and conserve moisture.
16.
Where do scorpions inject their venom from?
Correct Answer
A. Tail
Explanation
Scorpions inject their venom from their tail. The tail of a scorpion contains a stinger, which is used to deliver venom to their prey or in self-defense. The venom is produced in a gland located at the base of the stinger and is injected into the victim through a sharp, curved stinger at the end of the tail. This venom is used to immobilize or kill their prey, as well as to defend themselves from potential threats.
17.
Where do ticks and mites live on?
Correct Answer
A. B and c
Explanation
Ticks and mites are types of parasites that can be found living on both animals and plants. They often attach themselves to the skin or fur of animals, such as mammals and birds, and feed on their blood. Additionally, ticks and mites can also infest plants, causing damage to crops and vegetation. Therefore, the correct answer is "b and c" as ticks and mites can live on both animals and plants.
18.
What do they eat?
Correct Answer
B. Body fluids
Explanation
The correct answer is body fluids. This suggests that the question is asking about the dietary preferences of a certain group or species. While flesh, sperm, and organs could also be consumed by some animals, body fluids are a more general and encompassing term that can refer to various types of fluids consumed by different organisms.
19.
How many species of insects are there?
Correct Answer
C. About 700,000
Explanation
There are approximately 700,000 species of insects. Insects are the most diverse group of animals on Earth, and they can be found in almost every habitat. They play crucial roles in ecosystems as pollinators, decomposers, and as a food source for other animals. The large number of insect species highlights their incredible adaptability and success in various environments.
20.
Do all arthropods need an exoskeleton, segmented bodies, jointed appendages, and legs.
Correct Answer
A. True
Explanation
All arthropods have an exoskeleton, segmented bodies, jointed appendages, and legs. These characteristics are defining features of the arthropod phylum, which includes insects, spiders, crustaceans, and other related organisms. The exoskeleton provides support and protection, while the segmented bodies and jointed appendages allow for flexibility and movement. Legs are a type of jointed appendage that arthropods use for locomotion. Therefore, it can be concluded that all arthropods possess these traits.