1.
How do the sharks live today?
Correct Answer
A. They live the same as they did before
Explanation
The correct answer suggests that sharks live today in the same way as they did before. This implies that their lifestyle, behavior, and habitat have remained unchanged over time. It indicates that there has been no significant evolutionary or behavioral shift in how sharks live.
2.
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How many kinds of sharks are there in the world?
Correct Answer
B. More than three hundred and fifty
Explanation
The correct answer is "more than three hundred and fifty." This suggests that there are a large number of different kinds of sharks in the world, exceeding the number three hundred and fifty.
3.
What is the skeleton made of?
Correct Answer
B. Cartilage
Explanation
The skeleton is made of bones, which provide structure and support to the body. However, during early development, the skeleton is primarily made of cartilage, a flexible and rubbery connective tissue. As the body grows, some cartilage is replaced by bone through a process called ossification. Therefore, while cartilage is an important component of the skeleton during development, bones are the main structural component in the adult skeleton.
4.
What can the sharks find in the water with its sense of smell?
Correct Answer
A. Blood, body liquids and chemicals produced by animals
Explanation
Sharks can detect blood, body liquids, and chemicals produced by animals in the water using their sense of smell. This is because they have a highly developed olfactory system that allows them to detect even trace amounts of these substances. This ability is crucial for sharks to locate potential prey or injured animals in their environment.
5.
Which kind of shark which like to eat anything?
Correct Answer
D. Tiger shark
Explanation
Tiger sharks are known to be opportunistic feeders and have a reputation for eating almost anything. They are often referred to as "garbage cans of the sea" due to their diverse diet, which includes fish, seals, dolphins, turtles, birds, and even garbage. This makes them the kind of shark that likes to eat anything.
6.
Scientists say sharks have lived in the world's oceans for millions of years. What does scientist mean?
Correct Answer
A. An expert who studies or works in one of the sciences
Explanation
Scientists are individuals who have expertise in a specific scientific field and dedicate their time to studying or working in that field. They have extensive knowledge and understanding of the subject matter, conducting research, and applying scientific methods to gain new insights and expand our understanding of the world. Their expertise and contributions are based on years of study, experience, and a deep understanding of the scientific principles and processes involved.
7.
What can you find in tiger sharks’ stomach?
Correct Answer
D. A cow's foot and metal protective clothing
Explanation
Tiger sharks are known to have a wide-ranging diet and are often referred to as "garbage cans of the sea" because of their ability to consume almost anything. The presence of a cow's foot and metal protective clothing in a tiger shark's stomach suggests that they have a scavenging behavior and are not selective eaters. This highlights the opportunistic nature of tiger sharks and their ability to consume large and unusual items that they come across in their environment.
8.
What do the sharks eat?
Correct Answer
B. Fish, other sharks and snake
Explanation
Sharks are carnivorous creatures that primarily feed on fish, making fish a part of their diet. They are also known to prey on other sharks, which explains the inclusion of "other sharks" in the answer. However, it is important to note that not all sharks eat other sharks. Lastly, the inclusion of snake in the answer is incorrect as sharks do not typically consume snakes as part of their diet.
9.
Are they older than dinosaurs?
Correct Answer
D. Yes, they are
Explanation
The correct answer is "Yes, they are" because the question asks if "they" are older than dinosaurs. The response "Yes, they are" indicates that "they" are indeed older than dinosaurs. The other options "No, they aren't," "No, they isn't," and "Yes, they is" are grammatically incorrect and do not provide a correct response to the question.
10.
Do sharks have bone?
Correct Answer
B. Yes, they do
Explanation
Sharks do have bones. However, their skeletons are not made entirely of bone like mammals. Instead, they have a skeleton made of cartilage, which is a tough and flexible tissue. This cartilaginous skeleton allows sharks to be more agile and swim more efficiently in water. So, while sharks do have a skeletal structure, it is not composed of true bone.