Answer:
dust smoke and dirts produced by old vehicles
Explanation:
cuz they are used almost everyday and produces polluted air
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The channel proteins and carrier proteins allow molecules to pass through the semipermeable cell membrane in order to maintain homeostasis. Hope this helps! :)<span />
many advantage of genetically modified crops. such as diseases free, increase yield according to own desire, we introduce vit A in Golden rice that is useful , etc
You can learn their traits such as the color of the feathers and where they came from or originated from
<span>In mammals, air enters lungs through tubes called _____, which branch into smaller tubules called _____, which extend out to tiny air sacs called _____.
trachea; bronchioles; spongy tissue
>> bronchi; bronchioles; alveoli
bronchi; alveoli; gills </span>
