Q: What are the four well-known states of matter? Read this paragraph and choose the correct option from the provided answers: The photo above represents water in three common states of matter. States of matter are different phases in which any given type of matter can exist. There are actually four well-known states of matter: solid, liquid, gas, and plasma. Plasma isn't represented in the iceberg photo, but the other three states of matter are. The iceberg itself consists of water in the solid state, and the lake consists of water in the liquid state. Choices: - solid, liquid, gas, and wave - solid, liquid, plasma, and metal - solid , imine , gas , and plasma - solid, liquid, gas, and plasma A:
solid, liquid, gas, and plasma

Q: In a photosystem, pigments in the light-harvesting complex pass light energy to two special molecules of what in the reaction center? Read this paragraph and choose the correct option from the provided answers: Figure 8.15 A photosystem consists of a light-harvesting complex and a reaction center. Pigments in the lightharvesting complex pass light energy to two special chlorophyll a molecules in the reaction center. The light excites an electron from the chlorophyll a pair, which passes to the primary electron acceptor. The excited electron must then be replaced. In (a) photosystem II, the electron comes from the splitting of water, which releases oxygen as a waste product. In (b) photosystem I, the electron comes from the chloroplast electron transport chain discussed below. Choices: - calcium - carbonate - nutrient - chlorophyll A:
chlorophyll

Q: Q: Types of compounds include covalent and which other compounds? Read this paragraph and choose the correct option from the provided answers: Types of compounds include covalent and ionic compounds. They differ in the nature of the bonds that hold their atoms or ions together. Choices: - reactant - soluble - solvent - ionic A:
A: ionic

Question: Q: The cochlea is a shell-like structure that is full of fluid and lined with nerve cells called what? Read this paragraph and choose the correct option from the provided answers: The stirrup passes the amplified sound waves to the inner ear through the oval window (see Figure above ). When the oval window vibrates, it causes the cochlea to vibrate as well. The cochlea is a shell-like structure that is full of fluid and lined with nerve cells called hair cells. Each hair cell has tiny hair-like projections, as you can see in Figure below . When the cochlea vibrates, it causes waves in the fluid inside. The waves bend the "hairs" on the hair cells, and this triggers electrical impulses. The electrical impulses travel to the brain through nerves. Only after the nerve impulses reach the brain do we hear the sound. Choices: - sperm cells - red cells - brain cells - hair cells A:
Answer: hair cells

*Question*
Q: What term is used to describe animals with three germ layers? Read this paragraph and choose the correct option from the provided answers: Watch this video (http://openstaxcollege. org/l/symmetry2) to see a quick sketch of the different types of body symmetry. Layers of Tissues Most animal species undergo a layering of early tissues during embryonic development. These layers are called germ layers. Each layer develops into a specific set of tissues and organs. Animals develop either two or three embryonic germs layers (Figure 15.5). The animals that display radial symmetry develop two germ layers, an inner layer (endoderm) and an outer layer (ectoderm). These animals are called diploblasts. Animals with bilateral symmetry develop three germ layers: an inner layer (endoderm), an outer layer (ectoderm), and a middle layer (mesoderm). Animals with three germ layers are called triploblasts. Choices: - sporozoans - triplegerm - multilayer - triploblasts A:
**Answer**
triploblasts

Q: Symptoms of viral diseases result from what kind of response to a virus? Read this paragraph and choose the correct option from the provided answers: Steps of Virus Infections A virus must use cell processes to replicate. The viral replication cycle can produce dramatic biochemical and structural changes in the host cell, which may cause cell damage. These changes, called cytopathic (causing cell damage) effects, can change cell functions or even destroy the cell. Some infected cells, such as those infected by the common cold virus known as rhinovirus, die through lysis (bursting) or apoptosis (programmed cell death or "cell suicide"), releasing all progeny virions at once. The symptoms of viral diseases result from the immune response to the virus, which attempts to control and eliminate the virus from the body, and from cell damage caused by the virus. Many animal viruses, such as HIV (human immunodeficiency virus), leave the infected cells of the immune system by a process known as budding, where virions leave the cell individually. During the budding process, the cell does not undergo lysis and is not immediately killed. However, the damage to the cells that the virus infects may make it impossible for the cells to function normally, even though the cells remain alive for a period of time. Most productive viral infections follow similar steps in the virus replication cycle: attachment, penetration, uncoating, replication, assembly, and release (Figure 21.8). Attachment A virus attaches to a specific receptor site on the host cell membrane through attachment proteins in the capsid or via glycoproteins embedded in the viral envelope. The specificity of this interaction determines the hostand the cells within the hostthat can be infected by a particular virus. This can be illustrated by thinking of several keys and several locks, where each key will fit only one specific lock. Choices: - infection - pathogenic - mutation - immune A:
immune