The role of a watershed is
a) purify water
b) act as a drainage area
c) collect fish from rivers and streams
d) protect wetland areas

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

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.

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.