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The molecule known as ATP (adenosine triphosphate) is the main source of energy for cells. It supplies energy for a number of cellular functions, including:Macromolecule synthesis: The energy required for biosynthetic reactions that create complex molecules like proteins, nucleic acids, and lipids is provided by ATP.Transporting molecules and ions: To maintain concentration gradients and facilitate cellular communication, ATP-driven pumps and transporters use the energy from ATP hydrolysis to move molecules and ions across cellular membranes.Performing mechanical work: Cell movement, muscle contraction, and other mechanical processes all depend on ATP. The energy released by ATP hydrolysis powers these mechanical processes.As a result, ATP is crucial for the movement and use of energy inside cells, allowing for a number of vital cellular processes.

Primates are known for having opposable thumbs, which enable the digits to grasp and handle objects.

The reflex action’s impulse pathway is known as the reflex arc. The center of reflex action is the spinal cord. It starts with a motor neuron at an effector (like a skeletal muscle) and finishes with a sensory neuron at a receptor (like a pain receptor in the fingertip).

In conclusion, Louis Pasteur made a revolutionary contribution to the science of vaccination when he created the rabies vaccine (option C).

Mastication is the primary purpose of teeth. Food is broken down into smaller pieces during the chewing process, known as mastication, to facilitate swallowing and digestion. The teeth are in charge of tearing, grinding, and chopping food.

By applying stress or selection pressure to a specific variation, the surrounding environment determines whether the species will thrive or disappear.

Mycobacterium tuberculosis, the bacterium that causes tuberculosis (TB), is extremely contagious and may spread via the air. It is a serious public health issue in many underdeveloped nations because it thrives in unfavorable living circumstances and malnutrition.

Since prokaryotes are also cells but lack membrane-bound organelles, option D is the correct response. Theodor Schwann’s Cell Theory makes all other possibilities clear.

During chromosomal segregation, centrioles help organize microtubules to produce the spindle fibers. Centrioles are not necessary for microtubules to produce spindle fibers in higher plant cells.