Concept explainers
DRAW IT Ø The three domains you learned about in Concept 1.2 can be represented in the tree of life as the three main branches, with three subbranches on the eukaryotic branch being the kingdoms Plantae,
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CAMPBELL'S BIOLOGY 12E PERUSALL
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- 1. How do members of Eukarya differ from the prokaryotic groups of Chp 26 (your text lists 4 major differences)? Do these differences represent a greater success and superiority of eukaryotic over prokaryotic cells? 2. Examine Figure 27.1 from your text. How does this phylogenetic tree show that "Protists" are paraphyletic? Hint: think about what the term "paraphyletic" means in your answer.. 3. Describe at least two impacts that protists have on humans and two ecological importance's protists have on the planet. 4. What is direct sequencing and how has it been used to discover new lineages in the eukaryotic group? Be specific! 5. What is the endosymbiosis theory and what are thought to have been the three main steps in the theory? What are thought to have been the two main steps in the nucleus formation? • Previous Next MacBook Pro G Search or type URL 23 %24 &arrow_forwardPut a checkmark (1) on the group where each of the following structures are present. Cellular Structures Plantae Animalia FungiProtista Monera 1. Nucleus 2. Nucleoid 3. Nucleolus 4. Ribosomes 5. Golgi Body 6. Endoplasmic reticulum 7. Plasma membrane 8. Centriole 9. Cell wall 10. Chloroplast 11. Mitochondria 12. Cytoplasm 13. Cytoskeleton 14.Pigments 15. DNAarrow_forwardDRAW IT Recent evidence indicates that the root ofthe eukaryotic tree may lie between a clade that includesunikonts and excavates, and all other eukaryotes. Drawthe tree suggested by this result.arrow_forward
- The chlorophyte (green algae) genera Ulva and Caulerpa both have macroscopic leaf-like and stem-like structures, but only Ulva species are considered truly multicellular. Explain why.arrow_forwardCan you identify the major theme illustrated by each of the following examples? If necessary, you may review the themes in Chapter 1 of your book Match the themes on the left with the examples on the right. Not all themes will be used. Interactions within biological systems Information flow Evolution Pathways that transform energy and matter Relationship of structure to function Reset Help Every cell contains a DNA "cookbook" that provides directions on how to make and maintain that cell When a cell reproduces, it must duplicate its DNA, providing one copy to the new offspring cell while keeping one copy for itself Wattion and Crick realized that the chemical properties of each kind of base in DNA dictated the base pairings Each base has protruding chemical groups that can best form hydrogen bonds with only one appropriate partner Besides having practical purposes, a shared genetic vocabulary also reminds us of the kinship that connects all life on Earth The process of DNA replication…arrow_forwardThe cells labeled A came from a human cheek. The cells labeled B came from an aquatic plant called Elodea. Which is a difference you can see in these images? 1. there is only one cheek cell but many Elodea cells 2. the cheek cells have organelles, the Elodea cells do not 3. all these choices are correct 4. the cheek cells are eukaryotic, the Elodea cells are prokaryotic 5.the cheek cells have no cell wall, the Elodea cells doarrow_forward
- Test Your Understanding 1. Which of the following is not true of the protists? (a) they are unicellular, colonial, coenocytic, or simple multicellular organisms (b) their cilia and flagella have a 9 + 2 arrangement of microtubules (c) they are prokaryotic, as bacteria and archaea are (d) some are free-living, and some are endosymbionts (e) most are aquatic and live in the ocean or in freshwater pondsarrow_forwardCan you give at least 3 statements of the similarities of the life processes of plants and animals?arrow_forward1.List down some fundamental characteristics that are common to ALL cells and fundamental functions that are common to ALL cells. 2.Provide five key comparisons between the structure of prokaryotic and eukaryotic cells. 3.Compare/contrast the following mechanisms of prokaryotic and eukaryotic cells in terms of: •Reproduction •Locomotion •Metabolismarrow_forward
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