There are two jet streams, a subtropical and a polar-front jet stream.
Answer:
The gametophyte generation is longest and largest phase
Explanation:
Bryophytes evolved from the algae group of the plants which were aquatic environment. The Chara algae which grow in the tidal region evolved to form the first plants which could grow in both water and land called bryophytes.
The bryophytes although obtained nutrition from the terrestrial environment but their gametophytic stage was dependent on the water for the fertilization.
The gametophyte which produces the gametes were larger and independent as compared to the sporophyte which was small. The gametophytes formed the dominant phase of the life cycle of the bryophytes.
Thus, The gametophyte generation is longest and largest phase is correct.
Greenhouse gases such as carbon dioxide trap heat, helping warm the globe. The surge in carbon dioxide levels due to human activity since the Industrial Revolution is now causing an overall warming of the planet that is having impacts around the globe. And the burning of fuel generates not only carbon dioxide, but also air pollutants that are harmful to human health.
If a repressor protein attaches to the operator, RNA polymerase cannot proceed to transcribe key enzymes needed by the organism. This can be seen in the trp operon in E .coli bacteria.
