Answer the following question given this paragraph: The term carbohydrate comes from the fact that the majority contain carbon, hydrogen, and oxygen in a ratio of 1:2:1, making for an empirical formula of CH 2 O. This is somewhat misleading because the molecules are not actually hydrates of carbon at all. Carbohydrates are monomers and polymers of aldehydes and ketones that have multiple hydroxyl groups attached. Q: What contains carbon, hydrogen, and oxygen in a ratio of 1:2:1? Choices: - helium - sodium - magnesium - carbohydrate A:
carbohydrate
(Question)
Answer the following question given this paragraph: Q: What are most fresh fruits, vegetables, whole grains rich in? Choices: - calcium - cholesterol - magnesium - cellulose A:
(Answer)
cellulose
Ques: Answer the following question given this paragraph: There are times in Earth history when all of the continents come together to form a supercontinent . Supercontinents come together and then break apart. Pangaea was the last supercontinent on Earth, but it was not the first. The supercontinent before Pangaea is called Rodinia. Rodinia contained about 75% of the continental landmass that is present today. The supercontinent came together about 1.1 billion years ago. Rodinia was not the first supercontinent either. Scientists think that three supercontinents came before Rodina, making five so far in Earth history. Q: What was the last supercontinent on earth? Choices: - rodinia - laurasia - eurasia - pangaea A:
Ans: pangaea
(Q).
Answer the following question given this paragraph: CHAPTER SUMMARY 3.1 How Cells Are Studied A cell is the smallest unit of life. Most cells are so small that they cannot be viewed with the naked eye. Therefore, scientists must use microscopes to study cells. Electron microscopes provide higher magnification, higher resolution, and more detail than light microscopes. The unified cell theory states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells. Q: Which theory states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells? Choices: - theory of evolution - microcellular theory - natural selection - unified cell theory A:
(A).
unified cell theory
Ques:Answer the following question given this paragraph: Abnormally high activity of the parathyroid gland can cause hyperparathyroidism, a disorder caused by an overproduction of PTH that results in excessive calcium reabsorption from bone. Hyperparathyroidism can significantly decrease bone density, leading to spontaneous fractures or deformities. As blood calcium levels rise, cell membrane permeability to sodium is decreased, and the responsiveness of the nervous system is reduced. At the same time, calcium deposits may collect in the body's tissues and organs, impairing their functioning. In contrast, abnormally low blood calcium levels may be caused by parathyroid hormone deficiency, called hypoparathyroidism, which may develop following injury or surgery involving the thyroid gland. Low blood calcium. Q: Abnormally high activity or low activity of the parathyroid gland can cause disorders related to levels of what bone mineral? Choices: - potassium - collagen - magnesium - calcium A:

Ans:calcium
Answer the following question given this paragraph: The ancestor of plants is green algae. This picture shows a close up of algae on the beach. Q: Name the plant considered to be the ancestor of plants? Choices: - brown algae - ferns - grass - green algae A:
green algae