Permafrost - a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions. in which biome would you most likely find permafrost? a) tundra b) desert c) savannah d) mountain

Look at the figure above. which atmospheric layer has around 80 percent of the mass of the earth's atmosphere? (hint: it's where the clouds seen on earth are formed.) a. exosphere b. troposphere c. stratosphere d. thermosphere

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Me with biology endocrine system crossword also image left i need with hw