Which describes one effect of the sea-level change that occurred during the last ice age? a flooding that swept across the land due to regression
b buildup of salt in freshwater areas due to transgression
c extinction of organisms in shallow waters due to regression
d erosion of shorelines and other coastal areas due to transgression

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?