A specific stretch of DNA that programs the amino acid sequence of a polypeptide is a ________
A) gene
B) protein
C) nucleic acid
D) enzyme
A
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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?
Calcium is cycled most rapidly in terrestrial environments
Indicate whether the statement is true or false.
Circulation in the above diagram functions primarily as a(n) ____
a. closed circulatory system b. open circulatory system c. semi-closed circulatory system d. system of exchange using capillaries e. continuous system of vessels
Which of the following is (are) common fish
adaptation(s) to the challenges of life in water? a. fins b. swim bladder c. streamlined body d. scales e. all of these