The second type is called a peremptory challenge. Should you be challenged, the judge will decide whether or not you will be excused from service on that jury. But, by no means does this reflect on your ability or honesty. It only suggests that an attorney feels something in your personal background might make it difficult for you to decide in favor of his client. The plaintiff may then offer additional evidence to explain or refute defendant's evidence.
Most evidence is presented by oral testimony of witnesses who testify under oath.
The lawyer calling the witness first proceeds with direct examination, then the opposing lawyer proceeds with cross examination. After cross examination, the first lawyer may ask additional questions on redirect examination. The jury then returns to the jury room to decide the facts based on evidence presented. Any other questions involved are determined by applying the law as instructed by the judge. A fair verdict is of the law as instructed by the judge.