Biology

Kala-azar, also known as visceral leishmaniasis, is transmitted by the bite of infected female sandflies, making 'Sandfly' the correct vector.

The first successfully cloned animal from an adult somatic cell was Dolly the sheep, cloned in 1996. This marked a significant milestone in genetics and cloning technology.

The normal range of white blood cells (WBCs) in a microliter of blood is typically between 4,500 and 10,000. This range is widely accepted in medical literature as the standard reference for healthy individuals.

Parkinson's disease primarily affects the brain, specifically the neurons in the substantia nigra region, leading to motor control issues. It is not related to lungs, eyes, or bones.

Viruses are acellular because they do not have a cellular structure; they are composed of genetic material enclosed in a protein coat and cannot carry out metabolic processes independently.

Red blood cells are produced in the bone marrow, which is the primary site of hematopoiesis in adults. The liver, heart, and spleen do not produce red blood cells under normal conditions.

A fibrous joint is where bones are connected by fibrous connective tissue, allowing little or no movement. This distinguishes it from cartilaginous and synovial joints, which involve cartilage and synovial fluid respectively.

The normal range of red blood cells (RBCs) in women is approximately 4.5 to 6.2 million per microliter of blood. Option A correctly reflects this typical range, whereas option D's range is lower than the standard reference values.

During human embryonic development, the heart is the first major organ to develop and begin functioning, starting to beat around three weeks after fertilization. This precedes the development of the brain, lungs, and kidneys.

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