Which statement is true? a) unicellular organisms cannot obtain energy or reproduce, but they can maintain structure (homeostasis). b) unicellular organisms don't have to do anything - they are only just one cell! c) unicellular organisms have to meet the 3 main challenges of life. they have to obtain energy, reproduce, and maintain structure (homeostasis). d) unicellular organisms are not living.

Describe the interaction that occurs between two objects with the same electrical charge.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Gwhich r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? which r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? −ch2−oh −ch2−o||c−nh2 −ch2−coo− −ch2−ch2−ch2−ch2−n+h3