NGSS LS 1-4 From Molecules to Organisms Animal and Plant Reproducing Successfully PowerPoint. Animals engage in behaviors that increase the odds of reproduction. Plants reproduce in many ways, sometimes depending on animal behaviors or special features. Ex.) Nest building to protect young from cold. In some invertebrate species, including many insects and some mollusks and worms, the female has a specialized sac, called a spermatheca. In non-mammal vertebrates, such as most birds and reptiles, t