Ireally need this this organism is shown as a free-living one that is anchored to the bottom of ponds and streams. what is the common name of the group which this organism belongs to? a. cnidarians b. annelids c. porifera d. flatworms

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation.c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation.d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.