Using only the groups of the periodic table, choose one element that is chemically similar to each of the following elements.
carbon
cesium
krypton
magnesium
aluminum
bromine

Describe at least 2 abiotic and two biotic factors found in the desert biome how do these abiotic factors interact with the biotic factors

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

The backbone of the double helix has an alternating molecules. what do you call these alternating molecule?