14. During a field experiment, students tested the effects of adding heavy metals to samples of water. Samples of water were taken from a pond.
Different heavy metals were then added to each sample. After the
experiment was complete, what is the best way to dispose of the
samples? *
Pour them back into the pond from which they were taken.
Pour them on soil that is located far from the pond.
Pour them on sand located along the edge of the pond
Pour them into a chemical waste container in the laboratory

a community that experiences major changes undergoes progress

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

ice cream

explanation: