When a sperm and an egg first unite a single new cell called a is formed?

What was the land like over 500 million years ago? what was under the sea?

Cedric has a low fever and minor aches. yesterday, he went to the doctor for his booster shot and receive the flu shot. which best explains why he has this reaction?

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.