Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
식물의 목질부는 물과 영양분을 운반하는 역할을 합니다.sigmul-ui mokjilbu-neun mul-gwa yeongyangbun-eul unbanhaneun yeoghal-eul hamnida.The xylem of the plant serves to transport water and nutrients.