Bats can fly in the dark because C. They are guided by ultrasonic waves produced by them Ring Worm is due to D. Fungi Which vitamin is provided by the Sunlight to the human body? B. Vitamin D The chie

Here are the solutions to the questions: 7. Bats can fly in the dark because Bats use a sophisticated system called echolocation*. They emit high-frequency ultrasonic sounds and listen for the echoes that bounce back from objects in their environment. This allows them to create a "sound map" of their surroundings, enabling them to navigate and hunt in complete darkness. The correct option is C. Bats can fly in the dark because C. They are guided by ultrasonic waves produced by them. 8. Ring Worm is due to Ringworm, despite its name, is not caused by a worm. It is a common fungal infection of the skin, hair, or nails. The fungi that cause ringworm are called dermatophytes. The correct option is D. Ring Worm is due to D. Fungi. 9. Which vitamin is provided by the Sunlight to the human body? When human skin is exposed to ultraviolet B (UVB) rays from sunlight, it triggers the synthesis of Vitamin D*. This is the primary natural way for the body to produce Vitamin D. The correct option is B. Vitamin provided by the Sunlight to the human body is B. Vitamin D. 10. The chief purpose of crop rotation is to check the loss of top soil Crop rotation is a practice of growing different types of crops in the same area in sequenced seasons. One of its main benefits is to maintain and improve soil fertility by replenishing specific nutrients. This directly addresses the loss of the soil's mineral content*, which is crucial for plant growth and overall soil health. While crop rotation can also help reduce erosion by improving soil structure, its direct impact on nutrient cycling is a chief purpose. The correct option is D. The chief purpose of crop rotation is to check the loss of top soil D. Of its mineral content. 11. The chemical name of Vitamin B is The term "Vitamin B" refers to a complex of several distinct vitamins (B1, B2, B3, etc.). Each has its own chemical name. A. Nicotinamide* is Vitamin B3. B. Riboflavin* is Vitamin B2. C. Ascorbic acid* is Vitamin C. D. Thiamine* is Vitamin B1. Since the question asks for "The chemical name of Vitamin B" (singular) and provides multiple options that are indeed chemical names for different B vitamins, the question is somewhat ambiguous. However, if a single answer must be chosen, and considering that Thiamine (B1) was one of the earliest identified B vitamins and is fundamental, it is a plausible intended answer. The correct option is D. The chemical name of Vitamin B is D. Thiamine. 12. Which of the following acts as a channel of transmission of blood to the heart in the human body? Veins* are blood vessels that carry deoxygenated blood from the body's tissues back to the heart. The only exception is the pulmonary veins, which carry oxygen