Answer:
The fish did not yet exist when the old layers of rocks were deposited. In fact, animals with hard parts did not evolve until about 600 million years ago, which is only about 13% of the 4.5 billion year age of the Earth. Multicellular animals without hard parts left tracks in older sediments, but had no fossilize-able body parts.
Explanation:
Answer:
The answer is probably hormone
Explanation:
The oxidation of organic compounds by molecular oxygen to produce CO2 and water releases free energy because electrons are being moved from atoms that have a lower affinity for electrons.
Answer:
A veterinarian wrote an article stating his disapproval of some of the tactics used to breed pedigree dogs. He stated that pedigree dogs can be healthy, but because of inbreeding, they’re more likely to have health problems than other dogs. The author supported his statement with scientific studies.
A breeder with 20 years of experience wrote an article that was pro-breeding. He talked about his own success and shared his opinions on proper breeding techniques. Because the veterinarian used scientific facts to support his reasoning, his article seemed more scientifically credible to me.
Explanation:
A plant cell has chloroplasts.
An animal cells doesn't.
