The si unit for pressure is pascal (pa). one hectopascal would equal how many pascals?

i believe it's letter "c"?

0.1 pa
10 pa
100 pa
1000 pa

What's the waste product of electrons and pyruvate combining in fermentation?  

Pl as time goes by and water goes through the water cycle again and again, the amount of water on earth: increases decreases ostays the same goes up and down

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?