What stage of a plants life cycle produces sex cells?

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Which step is the same in both forms of fermentation, as well as in cellular respiration?