What is the formula for cardiac output?

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

Apart of an ecosystem that can restrict the growth of a population is referred to as

When analyzing tree rings, what do scientists assume a thin ring indicates?