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Questions in biology

[Homework Help] What does a pulley consist of?

[Homework Help] Why do macromolecules differ in the amount of energy they contain?

[Homework Help] State two ways living and nonliving things differ.

[Homework Help] Which of the following represents the correct order in which early humans appeared? A. Homo erectus, Homo habilis, Homo sapiens, Australopithecine B. Homo habilis, Australopithecine, Homo erectus, Homo sapiens C. Australopithecine, Homo habilis, Homo erectus, Homo sapiens D. Australopithecine, Homo erectus, Homo habilis, Homo sapiens

[Homework Help] What makes up a code for each amino acid?

[Homework Help] What are the complementary mRNA and tRNA sequences for this sequence of DNA bases: CGA?

[Homework Help] What is the difference between interspecific and intraspecific competition?

[Homework Help] What is the ratio of heterozygous offspring to total offspring in the Punnett square?

[Homework Help] How does matter move through the biosphere, and how does energy move through the biosphere?

[Homework Help] What are the four bases that make up the rungs of the DNA ladder?