Answer the following question given this paragraph: Passive transport occurs when substances cross the plasma membrane without any input of energy from the cell. No energy is needed because the substances are moving from an area where they have a higher concentration to an area where they have a lower concentration. Concentration refers to the number of particles of a substance per unit of volume. The more particles of a substance in a given volume, the higher the concentration. A substance always moves from an area where it is more concentrated to an area where it is less concentrated. It's a little like a ball rolling down a hill. It goes by itself without any input of extra energy. Q: What type of transport occurs when substances cross the plasma membrane without any input of energy from the cell? Choices: - physical transport - wave diffusion - active transport - passive transport A:
passive transport
Answer the following question given this paragraph: Most decomposition reactions require an input of energy in the form of heat, light, or electricity. Q: Heat, electricity, or light might provide what necessary input to the process of decomposition? Choices: - source - material - food - energy A:
energy
Q: Answer the following question given this paragraph: Soil develops over time and forms soil horizons. Soil horizons are different layers of soil with depth. The most weathering occurs in the top layer. This layer is most exposed to weather! It is where fresh water comes into contact with the soil. Each layer lower is weathered just a little bit less than the layer above. As water moves down through the layers, it is able to do less work to change the soil. Q: Which layer of soil experiences the most weathering? Choices: - subsoil - bedrock - humus - top layer A:
A: top layer
Question: Answer the following question given this paragraph: Meiosis is a special type of cell division. It produces haploid daughter cells. It occurs when an organism makes gametes. Meiosis is basically mitosis times two. The original diploid cell divides twice. The first time is called meiosis I. The second time is called meiosis II. However, the DNA replicates only once. It replicates before meiosis I but not before meiosis II. This results in four haploid daughter cells. Q: What type of cells does meiosis produce? Choices: - child cells - diploid daughter cells - mutated cells - haploid daughter cells A:
Answer: haploid daughter cells
*Question*
Answer the following question given this paragraph: We can reduce our use of energy resources and the pollution they cause by conserving energy. Conservation means saving resources by using them more efficiently or not using them at all. Figure below shows several ways that people can conserve energy in their daily lives. You can find more energy-saving tips at the URL below. What do you do to save energy? What else could you do?. Q: How can we reduce use of energy resources? Choices: - liberation - restoration - modification - conservation A:
**Answer**
conservation
*Question*
Answer the following question given this paragraph: Food is chemical energy stored in organic molecules. Q: Food is chemical energy stored in what? Choices: - typical molecules - oxygen molecules - DNA molecules - organic molecules A:
**Answer**
organic molecules