Explain about cell envelope of bacteria and its modifications

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear

How many pounds does the earth weigh?