CK12 Life Science

Figure 10.28: The hormone ethylene plays a role in signaling these flower petals to separate and drop, a process known as abscis ...

to cut flowers. Figure 10.30: Cytokinins promote cell division and are necessary for growing plants in tissue culture; a small p ...

Figure 10.31: A reduction in levels of abscisic acid allows these buds to break dormancy and put out leaves. ( 27 ) Figure 10.32 ...

just that one side of the stem. With one side of the stem growing faster than the other, the plant begins to bend. You might hav ...

Figure 10.33: Leaves changing color is a response to the shortened length of the day in autumn. ( 19 ) school the next morning. ...

What are some seasonal responses in plants? Further Reading / Supplemental Links http://www.plantphysiol.org/cgi/reprint/116/1 ...

Points to Consider In the next chapter we will turn our attention to animals. List some ways animals are different from plants. ...

(16) reebs*. Angiosperms are the flowering plants.. CC-BY 2.0. (17) Paige Filler.http://www.flickr.com/photos/theequinest/251458 ...

Chapter 11 Introduction to Invertebrates 11.1 Lesson 11.1: Overview of Animals Lesson Objectives List the characteristics that ...

Figure 11.1: Animals are heterotrophs, meaning they must eat to get molecules necessary for their growth and energy. ( 9 ) Class ...

Figure 11.2: Sea stars are radially symmetrical. ( 3 ) Figure 11.3: A segmented body plan defines the phylum that includes the e ...

What Are Invertebrates? Besidesbeingclassifiedintophyla, animalsarealsooftencharacterizedasbeinginvertebrates or vertebrates. Th ...

Animals can be classified by both molecular data and physical characteristics such as symmetry. Invertebrates are animals witho ...

Points to Consider What do you think that jellyfishes and corals have in common? Think of some examples of animals that are bil ...

Figure 11.5: Sponges have tube-like bodies with many pores. ( 11 ) Sponges are relatively primitive animals and do not have brai ...

and circulatory functions. The cnidarians also have nerve tissue organized into a net-like structure. Cnidarians do not have tru ...

Figure 11.7: Sea anemones can sting and trap fish with their tentacles. ( 15 ) Figure 11.8: One type of sea anemone is home to t ...

Figure 11.9: The Portuguese man-o-war can deliver debilitating stings with its tentacles. ( 13 ) Coral reefs are built from colo ...

Lesson Summary Sponges are sessile filter feeders without true tissues. The cnidarians, such as jellyfish, are radially symmetr ...

medusa Cnidarian with a bell-shaped body directed downward. nematocysts Specialized cells in cnidarians that can release a small ...