A partial food web shows the movement of matter and energy in a land ecosystem.
Partial Food Web
Snake
Cougar
Mouse
Rabbit
Deer
Insects
Grasses
Deer need producers and oxygen to provide energy and matter for their cells. What is the primary source of oxygen for the deer in this ecosystem?
M. The oxygen is a product of photosynthesis by the insects. P. The oxygen is a product of photosynthesis by the grasses. R. The oxygen is a product of cellular respiration by the cougar. S. The oxygen is a product of cellular respiration by the grasses.
1 answer
The primary source of oxygen for the deer in this ecosystem is:
P. The oxygen is a product of photosynthesis by the grasses.
Grasses, as producers, carry out photosynthesis and release oxygen as a byproduct, which is essential for the survival of deer and other organisms in the ecosystem.
