In items of energy shortage from carbohydrates or fats in foods, the body uses protein in what way? a) it removes the nitrogen portion and burns the remaining fragments for energy b) it converts it to fat to provide more concentrated energy c) it decreases the breakdown of food proteins for energy and uses stored glycogen d) it stores amino acids in the cells to be used later for energy

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?