Answer:
Explanation:The seasons are caused as the Earth, tilted on its axis, travels in a loop around the Sun each year. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun.
Answer:
The answer is <u>C. only specific target cells</u>
Explanation:
- <u><em>Some hormones react with specific receptor sites on a cell membrane to stimulate the nucleotide</em></u>