Alittle girl steps on a sharp shell at the beach. what nerve pathway will this stimulus signal follow in order to lift her foot from the sharp object? a. sensory neuron, interneuron, motor neuron, effector b. motor neuron, interneuron, sensory neuron, effector c. sensory neuron, motor neuron, interneuron, receptor d. motor neuron, interneuron, sensory neuron, receptor

The correct answer is option A.

Explanation:

A reflex action takes place when nerve impulses travel a simple pathway known as a reflex arc. It has 5 basic parts:

-Receptors presented in the sense of organs or skin to detect a stimulus and generates an impulse.

-Sensory neurons send nerve impulses to the CNS that is spinal cord and brain.

-Interneurons in the CNS connect and carry messages to sensory neurons to the next part of a reflex arc.

-Motor neurons conduct impulses and send messages from the CNS to an effector.

-Effectors respond according to the impulses by contracting if it is a muscle fine or secreting hormone or enzyme if it is a gland.

Thus, the correct answer is option A.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

i think the answer is gold im not entirely sure