Which of the following best describes why invertebrates isn't considered a scientifically valid word when classifying animals? a. the term invertebrates describes all animals, so is not in classifying organisms within the animal kingdom. b. the term invertebrates is because all animals possess some sort of backbone or notochord. c. the term invertebrates classifies animals haphazardly based on a missing characteristic rather than a common one. d. the term invertebrates is too vague, since all animals evolved from single-celled organisms without a backbone.

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis