1.)The more mass a star has the younger it is. O True
O False
2.) are groups of up to a few thousand stars that are loosely held together by gravity. tend to be blue in color and often contain glowing gas and dust. They are made of young stars that formed from the same nebula.
A.) Dark matter
B.) Dark energy
C.) Open clusters
D.) Globular clusters

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms