16. Which of the following organisms is correctly paired with its trophic level?
a. fungus-primary consumer
b. grasshopper-secondary consumer
c. cyanobacterium-primary consumer
d. phytoplankton-primary producer
17. Endothermic species
a. Are more abundant than ectothermic species
b. May have a larger range that is less limited by cold temperatures
c. All of these
d. Tend to restricted to lower latitudes than ectothermic species
16. Phytoplankton – Primary producer
Reason- Phytoplankton are microscopic, marine algae. They possess chlorophyll hence are autotrophic, they require sunlight in order to prepare their food via photosynthesis. Phytoplankton is primary producers because they can synthesize their own food by fixing carbon dioxide and sunlight.
17. Endotherms – May have a larger range that is less limited by cold temperature.
Reason – Endotherms or simply warm blooded animals use internally generated heat to regulate their body temperature.Their body temperature tend to remain constant regardless of the environment.
Endotherms can survive in a wider range of temperatures, for eg. If the temperature rises sweating occurs to cool down the body and when the temperature is low the body shivers to produce more heat.