<span>a. Acoelomates. Flatworm is a type of acoelomate animal; they have no body cavity or ceolom but they have </span>mesenchyme in their body cavity that surrounds the gut and organs in one solid body.
The body controls this process of puberty through release of hormones, leutenizing hormone and follicle stimulating hormone for the development and maturity of the testes and sperm cells. also androgens will be released and are responsible for the male secondary sexual characteristics such as breaking vice and hair presence under the armpits and the pubic area<span />
Explanation:
AB or A or B are the possibilities
<span>Quadriceps spindle is the receptor.
The patellar reflex is also called a knee-j erk reflex. In a knee-j erk reflex arc the sensory neuron directly connects to the motor neuron in the spinal cord. This is called a simple reflex arc. from the spindle to where it connects with the motor neuron in the spinal cord.</span>
