Answer:protection from other predators.
Explanation: the quills will stick into a predator that attack the porcupine Note: it does NOT shoot its quills
Answer:
activation of 100 molecules by a single signal binding event
Explanation: i hope this help
Answer: a. adaptation
Explanation:
Sensory adaptation can be define as the reduction in sensitivity to a stimulus after a constant exposure to the stimulus. When the awareness and sensitivity towards the constant stimulus reduces, then the attention of the receives diverts to another stimulus present in the environment around it.
The given situation demonstrates the sensory adaptation this is because of the fact that Sariah developed the sensory adaptation towards the constant stimulus that is chirping. Now her attention diverts and she was able to talk to her friends, and she lost awareness of chirping although it was still there.
Answer:
D I believe, as it goes through different organs, they take oxygen and nutrients to continue functioning
