what looks like the parent, but doesn't have wings or reproductive organs?; embryos must search for their own food outside the egg; a paramecium grows from a nymph.; at what point during the life cycle could some mollusks be considered parasites?; why are so many eggs produced by invertebrates?; an egg cell is made fertile by ____________ .; a larva sheds its skin as it grows.; what happens when an invertebrate reaches adulthood?