Answer:
round worms reproduce sexually
the nervous system of a roundworm contains a brain and nerve cords
The correct answer is C: the gravitational forces due to the sun and the moon cancel each other's effect.
Answer:
porosity,minerals of softness,ease of dissolving
Explanation:
The members of the phylum arthropoda have jointed legs. the number of jointed legs are variable, may be three pairs as in cockroaches, four pairs in prawns and even hundred pairs in centipedes. Members of this phylum have ability to shed their their exoskeleton(molting) and body is divided into three fused segments - head, thorax and abdomen.
To produce food and energy for the cell
