Biology

Hantavirus is primarily transmitted to humans through inhalation of airborne particles contaminated with rodent urine, droppings, or saliva. While rodent bites are possible, they are a less common transmission route, and foodborne transmission is not a recognized mode.

Hantaviruses are primarily transmitted to humans through contact with infected rodents, especially deer mice in North America. While other rodents can carry hantaviruses, 'Deer mice' are the main known reservoir for hantavirus infections in humans, making option A the most accurate answer.

The average human tongue has about 10,000 taste buds, which are sensory organs responsible for detecting taste. This number is widely accepted in scientific literature.

The human eye socket, or orbit, is formed by seven bones: the frontal bone, sphenoid bone, zygomatic bone, maxilla, palatine bone, lacrimal bone, and ethmoid bone. The question asks about the number of bones in the human eye socket, which is correctly seven. The original answer 'Three' is incorrect and the explanation confused the orbit bones with ear bones. Therefore, the correct answer is 'D' (Seven).

The study of aging is called Gerontology, which focuses on the social, psychological, cognitive, and biological aspects of aging. The other options are unrelated or misspelled terms.

Dermatology is the branch of medicine that focuses on the study, diagnosis, and treatment of skin, its functions, and diseases. The other options are either misspellings or unrelated fields.

Anatomy is the branch of biology concerned with the study of the structure of organisms and their parts, making it the correct answer. The other options refer to different fields: Anthropobiology studies humans in relation to biology, Aphnology is not a recognized scientific term, and Apiology is the study of bees.

Agrostology is the scientific study of grasses, which makes option A the correct answer. The other options refer to broader or different fields of study.

Cockroaches have a tubular heart with multiple chambers (usually 13), which is characteristic of many arthropods. Leech, earthworm, and snail have different circulatory systems without a 13-chambered heart.

Reptiles have a 'mixed heart' structure, typically a three-chambered heart with two atria and one ventricle that is partially divided, allowing some mixing of oxygenated and deoxygenated blood. Birds have a four-chambered heart with complete separation, and fish have a two-chambered heart.