Where do most people in Africa south of the Sahara live ?

What action should you not take if your friends do not accept your decision to abstain from alcohol

Plants in the tundra biomes have had to adapt to live long periods of time without a. cool temperatures b. sunlight c. oxygen d. water

Which of the following is a measure of the amount of light a star directly emits? a. luminosity b. wavelength c. brightness d. intensity