Q: Q: Thylakoid membranes contain molecules of what green pigment used in photosynthesis? Read this paragraph and choose the correct option from the provided answers: The structure of a chloroplast shows how membrane and molecular architecture helps life processes. A chloroplast consists of thylakoid membranes surrounded by stroma. The thylakoids stack on top of each other, like a stack of pancakes. The thylakoid stacks arrange chlorophyll, accessory pigment molecules, and photosynthetic proteins to capture sunlight and allow a concentration of ions within the sacs. You can see the green color of the chlorophyll. You cannot see the electron carriers, sequenced within the sac membranes, but their arrangement helps harvest small amounts of energy from excited electrons. The thylakoid membranes contain molecules of the green pigment chlorophyll. Choices: - carbonate - sodium - copper - chlorophyll A:
A: chlorophyll

Q: Q: How do you calculate the atomic mass of an element? Read this paragraph and choose the correct option from the provided answers: In this lesson, you learned about chemical bonds in a water molecule. The bonds form between atoms of hydrogen and oxygen when they share electrons. This type of bond is an example of a covalent bond. Choices: - add neutrons and electrons - count the electrons - multiply protons by neutrons - add the protons and neutrons together A:
A: add the protons and neutrons together

Q: Q: Astronomers have wondered if the universe is expanding fast enough to escape the pull of what? Read this paragraph and choose the correct option from the provided answers: We know that the Universe is expanding. Astronomers have wondered if it is expanding fast enough to escape the pull of gravity. Would the Universe just expand forever? If it could not escape the pull of gravity, would it someday start to contract? This means it would eventually get squeezed together in a big crunch. This is the opposite of the Big Bang. Choices: - kinetic energy - Coreolis effect - light - gravity A:
A: gravity

Q: Q: Surface tension and viscosity are generally associated with what form or state of matter? Read this paragraph and choose the correct option from the provided answers: Two interesting properties of liquids are surface tension and viscosity. Choices: - solids - gases - electrons - liquids A:
A: liquids