What kind of objects make up most of the visible matter in a galaxy?

If element X has 15 protons, how many electrons does it have?

Why is it necessary to utilize probes for labeling particular dna sequences? how is this process accomplished?

sodium has an atomic number of 11 and has a net charge of 0. When sodium combines with chlorine, it has a net charge of + 1. Why? A) sodium loses a negative electron when forming chemical bonds. b) sodium gains a + proton when forming chemical bonds.

Which of the following best describes sperm production in the male human reproductive system? A - One diploid cell, with 46 chromosomes, undergoes meiosis to form four haploid sperm cells, with 23 chromosomes each.

What is the acceleration of a 50 kg object pushed with a force of 500 newtons

After strenuous exercise sore muscles can occur because of? A. A stretching of the muscle tissue B. Too much oxygen in the blood C. A buildup of lactic acid in the tissues D. Too much glucose in the blood

Some types of cells require synthesis of large quantities of protein. These cells contain multiple nuclei to speed the synthesis process. Which of the following would most benefit from having multiple nuclei? A. skeletal muscle cells B.

Develop 3 questions about how genetic disorders are passed from one generation to the next, using the terms: DNA, chromosomes, and heredity.

When someone is angry, their respiration, heart rate, and sweating increase. The same responses are also seen when someone is afraid. Walter Cannon suggested that such findings brought which theory into question?

A nurse is performing cardiac compression on an adult client. how far must the nurse depress the lower sternum to maintain circulation until a defibrillator is available?