Because each gamete has only half the amount of DNA of a normal cell, when the male and female gamete unite, the zygote has a complete set of DNA.
The digestive system and respiratory system work together to remove waste from the body
"The tidal range was higher than normal due to the high tide which rose so high that it flooded the coast."
As sedimentation continues, the surface area of the weight that have settled to the bottom becomes greater. This allows for greater number of organism to attach to it. Thus, the answer for this item is that the weight settling onto the organism becomes greater.