Fossils are the remains, imprints, or traces of once-living organisms preserved in rock.
The scientific method describes the steps you use during an experiment
Answer: DNA.
Explanation:
DNA's instructions are used to make proteins in a two-step process. First, enzymes read the information in a DNA molecule and transcribe it into an intermediary molecule called messenger ribonucleic acid, or mRNA.
La respuesta correcta: 72 (36 x 2)
Lucky me I understand a little Spanish ;)
d. They can be concentrated in an organism’s fat tissues.
This is referred to as biomagnification -- the POPs become more concentrated as they move from one animal to another. This is a main concern because even trace amounts, in animals at the bottom of the food chain, can cause toxicity to animals at the top of the food chain.
