Answer:
finds the cows with a lump on his neck
DNA was found to contain only four different chemical building blocks.
Answer:
The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.
Explanation: brainlieast...?
Increased in pitch (frequency). It's the doppler effect.
