Select the correct answer. Which of the following is the correct symbol for the front indicated by the box?
warm air
cold air mass
cold air
ОА.
OB.
Ос.
OD

When plants use sunlight to make food, the energy of sunlight is

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?