Which statement about the photic zone is true?
A)Light intensity increases with depth.
B)Organisms depend directly on organic substances raining down from the aphotic zone.
C)The photic zone is thicker than the aphotic zone.
D)The photic zone has sufficient sunlight for organisms to photosynthesize.
E)The water is typically green because of the abundance of organic matter
Question 2
Metamorphic rocks ____.
A)always have igneous parent rock
B)always have sedimentary parent rock
C)are the oldest rock on Earth
D)are formed under conditions of high temperatures and pressures
E)can form on Earth's surface under special conditions
A classification system for living and extinct organisms.
By reflecting most visible light, snow creates a much cooler microclimate than nearby bare ground.
Classification of Living Organisms
Intramuscular drug administration: (a) cross section of skin showing depth of needle insertion
Interactions of Light and Matter
The surface temperature of the star is 6000 K. At what wavelength is its light output a maximum