Which of the following statements about genetics is correct? MCQ with Answer and Explanation

Explanation:
The ball and socket joint (e.g., glenohumeral, hip) allows movement in multiple axes (flexion, extension, abduction, adduction, rotation). The rounded head of one bone fits into the cup-shaped socket of another. Hinge (elbow, knee) allows movement in one plane, pivot (neck) allows rotation, gliding (wrist) allows sliding.

Explanation:
Dengue fever is a mosquito-borne viral infection caused by the Dengue virus (four serotypes). It is primarily transmitted by the bite of an infected female Aedes aegypti mosquito (and Aedes albopictus). These mosquitoes typically bite during the day. Anopheles transmits malaria, and Culex transmits filariasis and Japanese encephalitis.

Explanation:
A synapse is the junction where a nerve impulse is transmitted from one neuron to another. The synaptic cleft is the microscopic, fluid-filled gap between the presynaptic neuron (axon terminal) and the postsynaptic neuron (dendrite or cell body). Neurotransmitters are released into this cleft to carry the signal across to the next cell.