The movement of high-energy electrons down the electron transport chain leads to the 1. electrons oxidizing existing molecules of water.

2. formation of a proton gradient.

3. mitochondrial membrane becoming heavily electrically charged.

4. electrons oxidizing existing molecules of carbon dioxide.

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

Atype of organism that no longer exist on earth is said to be