Answer:
Explained below.
Explanation:
At least three forms of force when dropping a ball on the ground are gravitational force, air resistance force and the buoyancy force as well.
→ Gravitational force is a type of force that is acting while the ball is dropping, that is the downward force which is attracting the ball towards the centre of the surface of the earth.
→ Air resistance force is the upward force that will be acting while the ball is dropping on the ground.
→ The buoyancy force is the type of force that will act when the ball will touch the ground, then due to buoyancy force, the ball will bounce.
Answer:
A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Explanation:
.Some examples : Sea Otter. The sea otter (shown below) is considered a keystone species as their consumption of sea urchins, preventing the destruction of kelp forests caused by the sea urchin population. ...
.Large Mammalian Predators. ...
.Sea Star
Answer:
Explanation:
Cholinergic neurons release acetylcholine as a neurotransmitter. The cell bodies of preganglionic neurons of sympathetic division are present in the lateral horns of 12 thoracic and first two lumbar segments of the spinal cord. These are the cholinergic neurons and their axons release the acetylcholine as neurotransmitter into the synaptic cleft. The acetylcholine released by preganglionic sympathetic neurons binds to the cholinergic receptors present in the membranes of postganglionic neurons of the sympathetic division.
