The individuals may leave the parent, or they may stay connected iii. Most corals are assemblages of thousands of individuals, many of which budded off a few individuals that initially started the colony b. Fission is different only because the two individuals that bud off are about equal sized 2. The body of some invertebrates breaks into several pieces, each of which develops into an adult 3. If an arm is detached, and even a little bit of the central disk remains attached to it, an entire new individual will develop C. Sexual reproduction 1. Produces offspring that have varying phenotypes , presumably they have enhanced overall survival in variable climates ii.
Most animals have reproductive cycles a.
This allows them to reproduce during times of the year when resources are abundant i. Mechanics of sexual reproduction A. External fertilization 1. Eggs shed by female and fertilized by males in the environment 2. Often, a more primitive characteristic 3. Occurs only in aquatic or very moist environments B. Internal fertilization 1.