Active transport is the homeostatic process that moves particles against a concentration gradient.
Answer: Pigeon and duck.
Explanation:
From that side of the tree, you can see that the pigeon and the duck are closest together in the tree than the other organisms in the other options.
Bacteria !!!!!!!!!!!!!!!!!!!!!
Answer:
The cosmic microwave background radiation.
This is completely consistent with a fireball event in which the radiation field was in thermal equilibrium, and is perhaps the most convincing evidence for the Big Bang.
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Answer:
2 layers are in the plasma membrane