Which two characteristics do seedless vascular plants have that nonvascular plants do not have? A) they have phloem and true stems
B) They have roots and use spores to reproduce
C) They live in moist environments and have xylem
D) They have phloem and use spores to reproduce

The variables for this experiment include the number of each type of sprout, the average height of those sprouts, and the amount of compost given to each plot of land. use the drop-down menus to complete the sentences and identify the independent and dependent variables. the independent variable, the one that you intentionally manipulate, is the the dependent variables, the ones that you measure the response in, are

Average annual precipitation and are the two major features that define the biomes on earth.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm