Why do you think silk is valuable fibre?

Which term refers to the total dollar value of the goods and services produced in a country in a year?

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