Duckweed consists of tiny, free-floating green plants. duckweed typically consists of a leaf or cluster of leaves with small roots that hang down into the water; leaves and stem are not distinguishable from each other. it occurs on the surface of ponds, inlet creeks, and ditches. it and can exist as floating mats on the water's surface. which of these accurately describes the likely effect that duckweed has on the submerged plant populations in the lakes where duckweed is found?

Melissa lives in a town called greendale. she discovers that when she lights a match and holds it near her kitchen faucet, the little flame grows into a larger fire. melissa is surprised because she thought the water would extinguish the flame rather than ignite it further. her mother tells her that the water might be contaminated with dissolved methane, a primary component in natural gas. melissa investigates the matter and finds that cases of methane contamination started shortly after a company began fracking for natural gas in the area. based on this information, which three statements are plausible consequences of fracking in greendale?

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Which two factors contributed to creating a global culture? the creation of the united nations improvement in telecommunications health issues such as the ebola virus increased opportunities for global travel