What are the two little black dots at one end of the planarian called? What do they do for this organism?
Research and find the names of at least two animals and two plants that reproduce by fragmentation. Describe how each of these use fragmentation as a means of reproduction.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?