Answer:Carbon dioxide accounts for most of the nation's emissions and most of the increase since 1990. Transportation is the largest source of greenhouse gas emissions in the United States, followed by electricity generation.
Explanation:
The testes are responsible for producing sperm cells.
Answer:
d) stomata
Explanation:
CAM plants lose their stomata during the day and open them at night.
Therefore, CAM plants do not lose thylakoids, chloroplasts, or vascular bundles during the day and open them at night.
Answer:
Uracil "U"
Explanation:
RNA shares Adenine (‘A’), Guanine (‘G’) and Cytosine (‘C’) with DNA, but contains Uracil (‘U’) rather than Thymine.