Answer the following question given this paragraph: Cells make up all living things, including your own body. This picture shows a typical group of cells. But not all cells look alike. Cells can differ in shape and sizes. And the different shapes usually means different functions. Q: What small biological structures make up all living things, including the human body? Choices: - proteins - scales - lipids - cells A:
cells
Answer the following question given this paragraph: In eukaryotic cells, the DNA is kept in the nucleus. The nucleus is surrounded by a double membrane called the nuclear envelope. Within the nucleus is the nucleolus. Q: In eukaryotic cells, where is the dna kept? Choices: - mitochondria - epidermis - cytoplasm - nucleus A:
nucleus
Q: Answer the following question given this paragraph: Cnidarians such as jellyfish have radial symmetry. Flatworms and roundworms, which you will read about next, have bilateral symmetry. Q: What are jellyfish and other cnidarian's stingers called? Choices: - prokaryotes - necrocytes - phenocrysts - nematocysts A:
A: nematocysts
Question: Answer the following question given this paragraph: Introduction The individual sexually reproducing organismincluding humansbegins life as a fertilized egg, or zygote. Trillions of cell divisions subsequently occur in a controlled manner to produce a complex, multicellular human. In other words, that original single cell was the ancestor of every other cell in the body. Once a human individual is fully grown, cell reproduction is still necessary to repair or regenerate tissues. For example, new blood and skin cells are constantly being produced. All multicellular organisms use cell division for growth, and in most cases, the maintenance and repair of cells and tissues. Single-celled organisms use cell division as their method of reproduction. Q: The fertilized egg that sexually reproducing organisms begin life as is known as what? Choices: - gamete - fetus - infant - zygote A:
Answer: zygote
*Question*
Answer the following question given this paragraph: Lymph capillaries collect fluid that leaks out from blood capillaries. The lymphatic vessels return the fluid to the cardiovascular system. Q: Lymph capillaries collect fluid that leaks out of what? Choices: - bladder - alveoli - lymph nodes - blood capillaries A:
**Answer**
blood capillaries
(Question)
Answer the following question given this paragraph: Gasoline and oils are complex chemical mixtures designed to burn in a way that will efficiently produce energy while emitting a minimal amount of air pollution. The refining of gasoline has improved engine performance but is much more complicated than simply using the crude products extracted from oil wells, as was common in the late 1800s. Most gasoline contained lead at one time, because this additive helped the engine run more smoothly. However, this caused lead contamination in the environment, so new "unleaded" formulations were created that could be burned smoothly without the addition of poisonous heavy metals. Oils for lubrication have special additives that reduce engine wear. Some special fuel blends have also been created to generate more power in race car engines. Q: Why did people stop adding lead to gasoline? Choices: - bad smell - to expensive - explosions - environmental pollution A:
(Answer)
environmental pollution