The evolution of bilateral symmetry enabled animals to

A. evolve cephalization.
B. evolve feeding organs.
C. become motile.
D. reproduce sexually.


Answer: A

Biology & Microbiology

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The transduction of sound waves into action potentials takes place _____

A) within the tectorial membrane as it is stimulated by the hair cells B) when hair cells are bent against the tectorial membrane, causing them to depolarize and release neurotransmitter that stimulates sensory neurons C) as the basilar membrane becomes more permeable to sodium ions and depolarizes, initiating an action potential in a sensory neuron D) as the basilar membrane vibrates at different frequencies in response to the varying volume of sounds E) within the middle ear as the vibrations are amplified by the malleus, incus, and stapes

Biology & Microbiology

If the DNA code for a particular amino acid is AGT, then the anticodon on the tRNA would be _____

A) ACU B) TCA C) UCA D) AGU

Biology & Microbiology

A child blows up a balloon with air, the balloon will not float to the ceiling because

What will be an ideal response?

Biology & Microbiology

All living organisms have evolved from a single common ancestor. The existence of which molecule lends the greatest support to this statement?

a. phospholipids b. ribosomal RNA c. transfer RNA d. DNA e. messenger RNA

Biology & Microbiology