Which are vascular plants?
a. ferns and mycorrhiza
b. ferns and seed plants
c. mosses and seed plants

The answer is b because ferns are primitive vascular plants and seeded plants are one of the characteristics of vascular plants

a time line cause it goes from 685 to 978

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a