The bare ground between plants is covered with a layer of organic matter like straw. It helps to retain soil moisture. This system is known as

Why is immigration so important today?

Give three differences between oceanic and continental crust brainliest will be awarded

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks