Which statement about vestigial traits is correct?
A. Vestigial traits are similar to functional traits in closely related species.
B. Vestigial traits improve the biological fitness of individuals.
C. Vestigial traits cannot be explained by the theory of evolution by natural selection.
D. Humans lack vestigial traits.
Ans: A. Vestigial traits are similar to functional traits in closely related species.
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True or false. Look at the figure above to answer the questions below. _______ Resting potential is generated only by the movement ions. _______ The voltage differences shown above are measured across the plasma membrane (not deep within the cell). ______
The changes in voltage seen at #2 and #4 in the figure caused by movement of the same types of ions across the membranes. _______ _______ _______ The trace above is following the voltage change as down the axon. The voltage change above is an all-or-nothing response. Different membrane proteins are responsible for generating the voltage change seen at #2 and #4 in the figure. _______ _______ All voltage changes in a neuron's plasma membrane characteristic shape shown above. The changes in voltage shown above are due to the of ions right through the plasma membrane phospholipids bilayer (without the presence accessory protein). What will be an ideal response?
Which hypothesis states that the synthesis of DNA or RNA from the small molecules in the ocean would have come after the evolution of the plasma membrane and enzymes?
A. clay-catalyst hypothesis B. protein-first hypothesis C. chloroplast D. RNA-first hypothesis
Cardiac muscle requires input from the nervous system to contract
Indicate whether the statement is true or false
How would an animal compensate for a nonfunctional lateral line?
A. Gas exchange through the gill slits would have to be increased. B. Propulsion and directional control would have to be facilitated by other fins. C. Pressure waves in the water would have to be detected by other sensory structures. D. Skeletal support would need to be reinforced internally. E. Sex recognition by male fish would have to be accomplished by the olfactory structures.