What what are the two type of gases that affect the ozone layer the most?

Gabriel is at a stage where his body is changing physically; he is growing facial hair and building muscle. he is also just starting to make sperm. what is most likely gabriel’s age? 5 12 17 21

What is the following best defines climate?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?