xiang su
xiang su answered
Plants have chloroplast in their cells that contribute to photosynthesis, so they are Stationary Autotrophs. And animals don't  have chloroplast in their cells, then they can't carry on  the photosynthesis.
xiang su
xiang su answered
The mass of thymus gland is mutative at different stages of time. In birth, the mass is about 15 grams, in puberty, the mass is about 35 grams, in twenty-five years, the mass is 25 grams, in sixty years, the mass is less than 15 grams, in seventy years, the mass is as low as … Read more