1.
Arthropods are vertebrates.
Correct Answer
B. False
Explanation
Arthropods are not vertebrates. They belong to the phylum Arthropoda, which includes insects, spiders, crustaceans, and other invertebrates. Vertebrates, on the other hand, belong to the phylum Chordata and have a backbone or vertebral column. Therefore, the statement "Arthropods are vertebrates" is incorrect.
2.
Certain types of arthropods have exoskeletons.
Correct Answer
B. False
Explanation
Arthropods, which include insects, spiders, and crustaceans, do have exoskeletons. The exoskeleton is a hard, protective outer covering made of chitin. It provides support and protection for the arthropod's body. Therefore, the statement that certain types of arthropods have exoskeletons is true, not false.
3.
Some arthropods go through a process called molting.
Correct Answer
A. True
Explanation
Molting is a process in which arthropods shed their exoskeleton to allow for growth. This process is necessary for arthropods to accommodate their increasing size as they develop. Therefore, it is true that some arthropods go through the process of molting.
4.
Arthropods have segmented bodies.
Correct Answer
A. True
Explanation
Arthropods have segmented bodies because their bodies are divided into distinct sections or segments, which are joined together by joints. This segmentation allows for flexibility and mobility, as each segment can move independently. This characteristic is a defining feature of arthropods and is observed in various groups such as insects, spiders, crustaceans, and millipedes.
5.
Arthropods don't have jointed legs.
Correct Answer
B. False
Explanation
Arthropods do have jointed legs. Arthropods are a group of invertebrate animals that include insects, spiders, crustaceans, and others. One of the defining characteristics of arthropods is their jointed appendages, including legs. These jointed legs allow arthropods to have a wide range of movement and flexibility. Therefore, the statement that arthropods don't have jointed legs is false.
6.
Arthropods have a heart that pumps blood through the whole body.
Correct Answer
A. True
Explanation
Arthropods, such as insects and spiders, do have a heart that pumps blood throughout their entire body. This is a characteristic feature of arthropods' circulatory system, which helps transport oxygen and nutrients to different parts of their body. The heart in arthropods is a tubular structure that pumps hemolymph, a fluid similar to blood, and helps maintain circulation. Therefore, the statement "Arthropods have a heart that pumps blood through the whole body" is true.
7.
Arthropods reproduce asexually.
Correct Answer
B. False
Explanation
Arthropods do not reproduce asexually. They have a variety of reproductive strategies, including sexual reproduction. In sexual reproduction, arthropods typically have separate male and female individuals that produce gametes which combine to form offspring.
8.
Dogs are arthropods.
Correct Answer
B. False
Explanation
The statement "Dogs are arthropods" is incorrect. Dogs are mammals, not arthropods. Arthropods are a group of invertebrate animals that include insects, spiders, crustaceans, and others. Dogs, on the other hand, belong to the mammal group, characterized by having hair or fur, giving birth to live young, and producing milk for their offspring.
9.
Crab and millipedes are arthropods.
Correct Answer
A. True
Explanation
Arthropods are a diverse group of invertebrate animals that include insects, spiders, crustaceans, and millipedes. Both crabs and millipedes belong to the phylum Arthropoda, which is characterized by having jointed legs and a segmented body. Therefore, it is correct to say that crabs and millipedes are arthropods.
10.
Molting is a process in which a caterpiller becomes a butterfly.
Correct Answer
B. False
Explanation
The statement is incorrect. Molting is a process in which a caterpillar sheds its old skin to make way for new growth. It is a crucial part of the caterpillar's growth and development, but it does not result in the transformation into a butterfly. The transformation from a caterpillar to a butterfly occurs through the process of metamorphosis, which involves the formation of a chrysalis and the restructuring of the caterpillar's body into that of a butterfly.