Answer the following question given this paragraph: Neutrons have approximately the same mass as protons but no charge. They are electrically neutral. The mass of a proton or a neutron is about 1836 times greater than the mass of an electron. Protons and neutrons constitute by far the bulk of the mass of atoms. The discovery of the electron and the proton was crucial to the development of the modern model of the atom and provides an excellent case study in the application of the scientific method. In fact, the elucidation of the atom's structure is one of the greatest detective stories in the history of science. Q: What have approximately the same mass as protons but no charge? Choices: - atoms - reactions - electrons - neutrons A:
neutrons
Answer the following question given this paragraph: Unsaturated hydrocarbons that contain at least one double bond are called alkenes . The name of a specific alkene always ends in ene , with a prefix indicating the number of carbon atoms. Figure below shows the structural formula for the smallest alkene. It has just two carbon atoms and is named ethene. Ethene is produced by most fruits and vegetables. It speeds up ripening and also rotting. Figure below shows the effects of ethene on bananas. Q: What is the name for unsaturated hydrocarbons that contain at least one double bond? Choices: - lipids - acids - enzymes - alkenes A:
alkenes
Q: Answer the following question given this paragraph: Figure 41.6 The nephron is the functional unit of the kidney. The glomerulus and convoluted tubules are located in the kidney cortex, while collecting ducts are located in the pyramids of the medulla. (credit: modification of work by NIDDK). Q: The nephron is the functional unit of what pair of organs? Choices: - lungs - eyes - ribs - kidneys A:
A: kidneys
Question: Answer the following question given this paragraph: The first plants probably evolved from aquatic green algae. They had male and female reproductive organs. However, they lacked true stems, roots, and leaves. Q: The first plants probably evolved from what? Choices: - dry green algae - moss - mould - aquatic green algae A:
Answer: aquatic green algae
*Question*
Answer the following question given this paragraph: The population is an important level of organization in ecology. It is also the unit of microevolution. Q: What is an important level of organization in ecology and the unit of microevolution? Choices: - macro - system - organization - population A:
**Answer**
population
(Question)
Answer the following question given this paragraph: The half-life of titanium-44 is 60.0 y. A sample of titanium contains 0.600 g of titanium-44. How much remains after 100.0 y?. Q: Name the type of system that a jellyfish does not have? Choices: - nervous - reproductive - hereditary - circulatory A:
(Answer)
circulatory