Answer:
Mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes. In chemical digestion, enzymes break down food into the small molecules the body can use.
Human activities devote to climate changes by causing changes in the Earth's atmosphere in the quantity of greenhouse gases. The largest known devotion comes from the burning of fossil fuels that releases carbon dioxide gas in the atmosphere.
Answer: idk bro
Explanation: it’s makes no sense
Supongo que porque tiene vías respiratorias abiertas.
Answer:
pollen is important in fertilization because pollen carries male gamete and it helps in transportation of male gamete during fertilization in mainly gymnosperms and angiosperms.