Explain why a student of biology needs to study the hierarchy of levels of organization within and among living things.
What will be an ideal response?
All living things are made up of chemicals. An understanding of chemistry is the foundation for understanding how living things function. All living things are made up of cells. An understanding of cell function is necessary to understand how tissues work, and how it is possible for tissues to be organized into organs. Understanding the needs of individual organisms helps the student determine the workings of populations and communities.
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Which of the following would you classify as something other than an animal?
A) sponges B) coral C) jellyfish D) choanoflagellates
Choose the true statements about the evolution of larval dispersal in marine snails.
_____ The evolution of non-dispersing snails is likely to hinder speciation. _____ Clades of non-dispersing snails are less species rich than those of dispersing snails. _____ Loss of structures in the transition from dispersing to non-dispersing may inhibit evolutionary reversal. _____ Possession of dispersing larvae is the ancestral state in snails. _____ Cladistics shows that there are more instances of the transition from dispersing to non-dispersing larvae than the reverse.
The tertiary structure of a protein is dependent on
A. the side chain composition of each amino acid within the protein. B. hydrogen bonding between the carboxyl and amino groups within the polypeptide chain. C. the interactions of multiple polypeptide chains that make up a functional protein. D. the way in which the peptide bond forms. E. the degree through which the dehydration reaction occurs.
A drug that block monoamine oxidase will tend to increase the strength of a synapse that uses dopamine as the neurotransmitter or modulator.
a. true b. false