C4 plants have evolved different photosynthetic mechanisms. these plants view available hint(s)
a) fix co2 into a four-carbon compound instead of a three-carbon compound
b) are adapted to living in cold, wet climates where there is no water shortage
c) do not fix co2 through the calvin cycle
d) conserve water more efficiently by shutting their stomata during the day
e) fix o2 instead of co2`

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

During a hot day, warm and moist air rises and cools in the atmosphere. which even would occur next on such a day? a. condensed droplets would gather to become water vapor. b. water vapor would condense into tiny droplets. c. water droplets would evaporate to form rain and snow.

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?