Answer the following question given this paragraph: Processes in which matter changes between liquid and solid states are freezing and melting. Q: Processes in which matter changes between liquid and solid states are freezing and? Choices: - boiling - steaming - transpiration - melting A:
melting
Answer the following question given this paragraph: Macrophages are large WBCs that can also swallow and destroy old and dying cells, bacteria, or viruses. Below, a macrophage is attacking and swallowing two particles, possibly disease-causing pathogens ( Figure below ). Macrophages also release chemical messages that cause the number of WBCs to increase. Q: Macrophages, which can swallow and destroy old and dying cells, bacteria, or viruses, are large types of what cells? Choices: - red blood cells - white brain cells - dendritic cells - white blood cells A:
white blood cells
Q: Answer the following question given this paragraph: All radioactive decay is dangerous to living things, but alpha decay is the least dangerous. Q: What is the least dangerous radioactive decay? Choices: - beta decay - gamma decay - zeta decay - alpha decay A:
A: alpha decay
Question: Answer the following question given this paragraph: Another major step in animal evolution was the evolution of a notochord. A notochord is a rigid rod that runs the length of the body. It supports the body and gives it shape (see Figure below ). It also provides a place for muscles to anchor, and counterbalances them when they contract. Animals with a notochord are called chordates. They also have a hollow nerve cord that runs along the top of the body. Gill slits and a tail are two other chordate features. Many modern chordates have some of these structures only as embryos. Q: A major step in animal evolution was the evolution of what rigid rod that runs the length of the body? Choices: - limbic system - endoderm - mitochondria - notochord A:
Answer: notochord
*Question*
Answer the following question given this paragraph: Small nonpolar molecules can easily diffuse across the cell membrane. However, due to the hydrophobic nature of the lipids that make up cell membranes, polar molecules (such as water) and ions cannot do so. Instead, they diffuse across the membrane through transport proteins. A transport protein completely spans the membrane, and allows certain molecules or ions to diffuse across the membrane. Channel proteins, gated channel proteins, and carrier proteins are three types of transport proteins that are involved in facilitated diffusion. Q: Due to the __________ nature of the lipids that make up cell membranes, polar molecules (such as water) and ions cannot easily diffuse across the cell membrane. Choices: - hydrophylic - saturated - catalytic - hydrophobic A:
**Answer**
hydrophobic
(Q).
Answer the following question given this paragraph: When ancient plants underwent photosynthesis, they changed energy in sunlight to stored chemical energy in food. The plants used the food and so did the organisms that ate the plants. After the plants and other organisms died, their remains gradually changed to fossil fuels as they were covered and compressed by layers of sediments. Petroleum and natural gas formed from ocean organisms and are found together. Coal formed from giant tree ferns and other swamp plants. Q: During photosynthesis what organelle is used by plants to change sunlight into chemical energy? Choices: - mitochondria - golgi apparatus - ribosome - chloroplasts A:
(A).
chloroplasts