Which organelle is responsible for removal of other damaged organelles and cellular debris?
A) ribosomes
B) smooth endoplasmic reticulum
C) lysosomes
D) centrioles
E) mitochondria
C
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Without elephants, African grasslands convert to forests or to shrublands. Which of the following phrases are true statements about the elephant? Check all that apply.
_____ The elephant is a keystone species. _____ If elephants went extinct, other species in the area would be unaffected. _____ Elephants graze on young shrubs and trees. _____ Elephants are the most abundant species on the grassland. _____ Grazing antelope depend on the presence of the elephant. Additional: Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about the concept of keystone species? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following is not a eukaryotic retrotransposon?
A. gypsy B. Ty elements C. LINEs D. SINEs E. Tc1/mariner
What can be inferred from the accompanying graph?
a. This reaction is endergonic, with a positive ?G. b. This reaction is endergonic, with a negative ?G. c. This reaction is exergonic, with a positive ?G. d. This reaction is exergonic, with a negative ?G. e. There is not enough information to make a determination.
Which of the following statements about plant cell walls is false?
A) Plant cell walls consist of cellulose fibers embedded in a matrix of polysaccharides and proteins. B) Plant cell walls are multilayered structures. C) Plant cell walls protect plant cells by forming an impermeable layer around the cell. D) Wood is primarily composed of plant cell walls.