Some organelles found in modern eukaryotic cells may be the result of a symbiotic relationship between ancient prokaryotes. which organelles may have once been prokaryotes?
a.
mitochondria and endoplasmic reticulum
c.
mitochondria and ribosomes
b.
endoplasmic reticulum and vacuoles
d.
mitochondria and chloroplasts

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases