In all ecosystems energy is eventually lost to the environment via
a. heat resulting from respiration
b. radiation and reflection of light
c. photosynthesis
d. matter
e. trophic levels

Draw the structure of dna nucleotide with adenine as nitrogenous base

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes