Which fact best supports the hypothesis of one common ancestor for all life?
A) DNA sequences from bacteria can be transferred to plants and other organisms.
B) Species in some groups have homologous anatomical structures.
C) Embryonic development is similar for all chordates.
D) Species in similar geographic locations show structural similarities.
A
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The formation of the ozone shield during the Precambrian era helped to create favorable conditions for the evolution of terrestrial life forms.
Answer the following statement true (T) or false (F)
When guard cells are ________ a stomatal pore opens between them.
A. flaccid B. turgid C. overextended D. solute depleted E. ionically charged
What harvests energy from food molecules to make ATP?
A) Chloroplasts B) Mitochondria C) Nucleus D) Lysosome
Cell theory is one of the foundations of biology. What are the tenets of the cell theory? Check all that apply.
A. Cells arise from other cells through the process of cell division. B. Cells carry genetic material passed to daughter cells during cellular division. C. All organisms are made up of more than one cell. D. Organisms are formed through spontaneous generation E. All living organisms consist of cells F. All cells have the ability to move.