Figure 1
Number of acti
60
70
80 90 100 110 120 130
Number of spines
Figure 1
1. Refer to Figure 1. In a desert environment, cacti are eaten by peccaries, a 1 point
type of wild pig. What type of selection is shown in Figure 1?
O
Directional
O
Stabilizing
O
Disruptive
O
Normal

Ithink a saturated phospholipid

Producers (autotrophs) are in the bottom (first) trophic level, primary consumers are in the second trophic level, secondary consumers are in the third trophic level and tertiary consumers are in the top trophic level. energy moves through the trophic levels when one living organism is being consumed by another. moreover, energy level becomes lower as it moves up the energy pyramid because of it being released as heat. food chain is when there is a single pathway of energy transfer whereas a food web is when there are multiple pathways of energy transfer.