The clavicle and inter clavicle form a V-shaped furcula or wish bone or merry thought in birds.

A skull excavated from a place had large zygomatic arches, 2 pairs of large incisors, 2 pairs of premolars following a gap and 3 pairs of large molars. The foramen magnum was direction posterior. This skull belongs to a mammalian skull because it is predatory mammal with bipedal locomotion.

So, the correct option is ‘predatory mammal with bipedal locomotion’.

The author of the book 'Gait of animals' is Aristotle. It was written in 350 BC.
This book consists of information about the movement of animals. Gait is the pattern of movement of the limbs of animals, during locomotion over a solid substrate. Most animals use a variety of gaits, selecting gait based on speed, terrain, the need to maneuver, and energetic efficiency. Aristotle was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidiki, in the north of Greece. He was a student of Plato and considered as an important figure in western philosophy.

• So, the correct option is 'Aristotle'.
  
  

Both the statements are true.

Muscles which are able to contract voluntarily are only skeletal muscles.

Taxis is a kind of behavioural response of a cell, cell organelles or an organism to an external stimulus such as light or food. It is the orientation of an organism or a cell in a specific spatial relationship to a stimuli. If the movement is towards the stimuli it is positive taxis and if it is away from the stimuli it is negative taxis. 

• Locomotion is the active movement i.e. with consumption of energy shown by all organism. Need, type and extent of locomotion differ from organisms to organism based on their organisation. 
  
• The specialised nervous system is seen in only organisms with organ system level of organisation. 
  
• Several organisms are unicellular, hence multicellularity is not a common feature of all organisms. 
• All organisms differ in their mode of nutrition. They can be autotrophic or heterotrophic. If heterotrophic, they can be herbivores, carnivores or omnivores.
• So, the correct option is 'Locomotion'.

There are various types of joints in the human body.

• Joints are the areas where two or more bones meet.
• Joints are of three types. They are Synovial Joints, Fibrous Joints, and Cartilaginous Joints
• Joints help in bringing about movements in different parts of the body. 
  
• Synovial joints are the freely movable joints and show maximum moments in the body.
• Hence parts of the body that shows maximum movements are joints.
• So, the correct answer is 'Joints.

Muscle is a tissue composed of cells or fibers, the contraction of which produces movement in the body. Muscle acts like a dense elastic band. When a muscle contracts, the length decreases, thus making the muscle shorter, stiffer and thicker. When the muscle relaxes, it makes the muscle increase in length i.e longer and thinner. 

• Flexor muscle decreases the angle between the bones that converge at the joint.
  
• Extensor muscle increases the angle between the bones that converge at the joint.
• The biceps is a large muscle that lies on the front of the upper arm between the shoulder and the elbow and The triceps is a large muscle on the back of the upper limb.
  
• The biceps is the flexor, and the triceps is the extensor of the elbow joint.
• Hence muscles help in the movement of biceps and triceps.
• So, the correct answer is'Muscles'.

A muscle is a tissue composed of cells or fibers, the contraction of which produces movement in the body. Muscular force is needed to bring movement, which needs energy for the contraction and relaxation of the same. Muscles are attached to bones to bring about the required movement.

Hip bone is formed by the fusion of three bones; ilium on upper side, pubis on inner side and ischium below the pubis.

Interaction among actin, myosin and ATP

The ventral part of each half of pectoral girdle is comprise three skeletal pieces scapula, supra scapula, and coracles.

Sol-gel theory explains that it is the method for producing solid material from small molecules. The process involves the conversion of monomers into a colloidal solution (sol) that acts as the precursors for an integrated network (or get) or either discrete particles or network polymers.