Grade 5 Evs Unit 1

Explanation
Elephants have tusks, which are long, pointed teeth that extend outside of their mouths. These tusks are made of ivory, a valuable material that has been used for centuries to create decorative items and jewelry. Due to their size and durability, elephant tusks are highly sought after in the illegal ivory trade, leading to the endangerment of elephant populations worldwide.

Explanation
The instrument used by a snake charmer is called a pungi.

Explanation
Dogs have a highly developed sense of smell, and they use it to gather information about their surroundings, including other dogs. Urine contains unique chemical compounds that can provide dogs with important information about the other dog, such as its sex, age, and reproductive status. By smelling the urine, dogs can determine if another dog has entered their territory or area, allowing them to assess potential threats or mark their own territory in response.

Explanation
Birds move their necks very often because they have a high degree of flexibility in their neck muscles and vertebrae. This allows them to turn their heads in different directions, which is essential for their survival. Birds use their necks to search for food, predators, and mates, as well as to communicate with others of their species. The ability to move their necks enables birds to have a wide field of vision and better maneuverability in their environment.

Explanation
Poachers are individuals who illegally hunt and kill animals, often for their valuable body parts or for sport, without regard for conservation or legal regulations. Unlike hunters, who typically follow ethical and legal guidelines, poachers engage in illegal activities that threaten wildlife populations and disrupt ecosystems. The term "poacher" accurately describes individuals involved in this unlawful practice and highlights the negative impact they have on animal populations and biodiversity.

Explanation
A sloth can sleep for more than 18 hours. Sloths are known for their slow movement and low energy levels, which is why they spend most of their time sleeping. They have a slow metabolism and their diet consists mainly of leaves, which are low in nutrients. As a result, they need to conserve energy and sleep for long periods to compensate for their limited food intake. This extended sleep allows them to conserve energy and survive in their natural habitat.

Explanation
Nocturnal animals have adapted to low-light conditions and have a higher number of rod cells in their eyes, which are sensitive to low light. This allows them to see in shades of black and white, rather than in full color. This adaptation helps them navigate and hunt efficiently in the dark, as colors are not as important in low-light environments.

Explanation
Animals that are at risk of becoming extinct are referred to as endangered animals. This term is used to describe species that are facing a high risk of extinction in the near future. The label "endangered" is given to animals that have a declining population, limited habitat, or are being threatened by various factors such as habitat loss, poaching, or climate change. Conservation efforts are often implemented to protect these endangered animals and prevent their extinction.

Explanation
Animals are often killed for their body parts, which can be used for various purposes such as food, clothing, medicine, or decorative items. This includes the harvesting of animal skins for leather, the hunting of animals for their tusks or horns, and the killing of animals for their meat or organs. The demand for animal body parts can lead to illegal poaching and endangerment of certain species.

Explanation
Birds like kites, eagles, and vultures have exceptional eyesight compared to humans. They have a higher number of photoreceptor cells in their eyes, allowing them to perceive more details and see objects from a greater distance. The answer "four" suggests that these birds can see four times farther than humans, indicating their remarkable visual capabilities.

Explanation
Kites, eagles, and vultures have exceptional eyesight and can see things from a much greater distance compared to humans. The answer of 8 meters suggests that these birds can see something that is located 8 times farther away than what we can see from a distance of 2 meters. This implies that their visual range is significantly larger and they have the ability to spot objects or prey from a much greater distance.

Explanation
Animals that are awake in the daytime have the ability to see colors. This is because their eyes are specifically adapted to perceive and differentiate between different wavelengths of light, which are interpreted as various colors. This adaptation allows them to navigate their surroundings, identify objects, and communicate with other animals through visual cues. The ability to see colors is advantageous for diurnal animals as it helps them in finding food, avoiding predators, and interacting with their environment effectively.

Explanation
The given answer, "ears," is correct because the question is discussing a relationship between the size of animals' ears and their hearing. Ears are an essential component of the auditory system and play a crucial role in capturing and processing sound waves. The size of an animal's ears can affect their ability to detect and interpret different frequencies and volumes of sound. Generally, larger ears provide a larger surface area for sound reception, allowing animals to have more sensitive hearing. Therefore, the size of an animal's ears is directly related to their hearing capabilities.

Explanation
Snakes have a unique sensory organ called "Jacobson's organ" located in their mouths that allows them to detect and analyze chemical signals in the environment. This organ is highly sensitive to vibrations, allowing snakes to feel the movements and vibrations on the ground. This ability is crucial for their survival as it helps them detect prey, predators, and potential threats in their surroundings.

Explanation
Animals have their own language to communicate. This means that they have a system of communication that allows them to convey information and understand each other. While their language may not be as complex as human language, animals use various methods such as sounds, body movements, and gestures to communicate with one another. This language is essential for animals to express their needs, establish social hierarchies, and warn each other of potential dangers.

Explanation
Tigers are one of the most endangered animals due to various factors such as habitat loss, illegal poaching for their body parts, and conflict with humans. Their population has drastically declined in recent years, with only a few thousand remaining in the wild. Conservation efforts are being made to protect and restore their habitats, enforce anti-poaching laws, and raise awareness about the importance of preserving these majestic creatures.

Explanation
The tiger's whiskers are very sensitive and can sense the movements or vibrations in the air. Whiskers are long, thick hairs that grow on the face of many animals, including tigers. They are connected to nerve cells and can detect even the slightest changes in the surrounding environment. This helps the tiger navigate through its habitat, especially in low-light conditions, and locate prey or potential threats.

Explanation
Tiger's roars can be heard up to 3 km away.

Explanation
Musk deer are hunted solely for the purpose of extracting musk from their glands. Musk is a highly valued substance used in the production of perfumes, colognes, and other fragrances due to its strong and long-lasting scent. The demand for musk in the fragrance industry drives the illegal hunting and killing of musk deer, leading to their population decline.

Explanation
The sloth eats the leaves of the same tree on which it lives because leaves are a primary source of nutrition for sloths. Sloths have a slow metabolism and a specialized digestive system that allows them to efficiently extract nutrients from the leaves. By consuming the leaves of their habitat tree, sloths can meet their dietary needs without having to expend unnecessary energy on moving to different trees.

Explanation
Sloths have a lifespan of approximately 40 years and during this period, they typically move around on 8 trees. This suggests that sloths spend a significant portion of their lives in the same area, relying on a small number of trees for their habitat and food sources. The number 40 represents the average lifespan of sloths, while the mention of 8 trees indicates their limited mobility and dependence on a small number of resources.

Explanation
A tiger can see 6 times better at night than human beings because tigers have a higher number of rod cells in their eyes compared to humans. Rod cells are responsible for low-light vision, allowing animals to see in dim lighting conditions. Tigers have a larger number of rod cells, giving them superior night vision capabilities. This allows them to navigate and hunt effectively in the dark, giving them a significant advantage over humans in terms of night vision.

Explanation
Kalbeliyas are the people who catch snakes and make them dance by playing the been.

Explanation
The designs of snakes used in rangoli, embroidery, and as wall decoration in Saurashtra (Gujarat) and south India are referred to as "Nag Gumphan."

Explanation
Snake charmers keep the snakes in a bamboo basket because bamboo is a strong and flexible material that is commonly used for making baskets. It is lightweight and allows for proper ventilation, which is important for the snakes' well-being. Additionally, bamboo is readily available and easily replaceable, making it a practical choice for snake charmers to use in their profession.

Explanation
Snake charmers make medicines from the plants collected from the forest. This suggests that the plants they collect have medicinal properties that can be used to create medicines. It implies that snake charmers have knowledge of herbal medicine and utilize the plants they find in the forest to create remedies for various ailments.

Explanation
Some snake bites can lead to immediate death due to the venomous nature of certain snake species. The venom injected into the body can rapidly spread through the bloodstream, causing severe damage to vital organs and systems, leading to a quick and fatal outcome. It is crucial to seek immediate medical attention in case of a snake bite to prevent or minimize the risk of death.

Explanation
Snakes have specialized teeth called fangs that are used to inject venom into their prey or potential threats. These fangs are hollow and connected to venom glands, allowing the snake to deliver venom when it bites. The venom is used for hunting and defense, and can be highly toxic. Therefore, the correct answer for the given question is "fangs".

Explanation
The given statement suggests that there are only 4 types of snakes that are poisonous in our country. This implies that there might be other types of snakes in the country that are not poisonous.