PLEASE HELP WITH THIS ONE QUESTION
What systems supply food and oxygen needed for respiration?
A) excretory, digestive, and respiratory
B) excretory, respiratory, and cardiovascular
C) digestive, respiratory, and cardiovascular
D) digestive, excretory, and cardiovascular
Answers: 2
Biology, 21.06.2019 23:50
Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?
Answers: 2
Biology, 22.06.2019 09:30
In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity
Answers: 1
PLEASE HELP WITH THIS ONE QUESTION
What systems supply food and oxygen needed for respiration?
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