1. Owls sleep during the day and are awake at night because of their kind of
estivation
habituation*
circadian rhythm
conditioning
2. When a bird sings to signal others of the same species to keep away, it is showing signs of
cheerfulness
courtship behavior
conditioning
aggression*
I put * next to what I put as my answer.
1. The correct answer is circadian rhythm. Owls are known for being nocturnal animals, meaning they are active during the night and sleep during the day. This behavior is regulated by their internal biological clock, known as the circadian rhythm.
To arrive at this answer, you can eliminate the options that do not fit the description. Estivation refers to a state of dormancy during hot or dry periods, which is not applicable to owls. Habituation refers to a process of becoming accustomed to a particular stimulus, which is also not relevant to the question. Conditioning is a process of learning through association, but it does not explain why owls sleep during the day. Therefore, the correct answer is circadian rhythm.
2. The correct answer is aggression. When a bird sings to signal others of the same species to keep away, it is usually a display of aggression towards potential rivals or threats. This behavior is a form of territorial defense and is commonly observed in birds.
To determine the correct answer, you can examine the options provided. Cheerfulness refers to a state of being happy or joyful, which does not fit the context of signaling others to keep away. Courtship behavior involves attracting a mate and is generally characterized by displays of mating rituals or reproductive signals, rather than indicating others to stay away. Conditioning, as mentioned earlier, is a process of learning through association and does not describe the behavior of birds singing to signal others to keep away. Therefore, the correct answer is aggression.