user: Q: Interneurons carry what back and forth between sensory and motor neurons?   Read this paragraph and choose the correct option from the provided answers:  Interneurons carry nerve impulses back and forth between sensory and motor neurons.   Choices:  - sciatica  - electricity  - flux impulses  - nerve impulses   A:
nerve impulses


(Question)
Q: What do the muscles of the gastrointestinal tract do?   Read this paragraph and choose the correct option from the provided answers:  Organs of the GI tract are covered by muscles that contract to keep food moving along. A series of involuntary muscle contractions moves rapidly along the tract, like a wave travelling through a spring toy. The muscle contractions are called peristalsis. The diagram in Figure below shows how peristalsis works.   Choices:  - break down food  - secrete stomach acid  - stop digestion  - keep food moving   A:
(Answer)
keep food moving


Ques: Q: The stem of a horsetail is characterized by the presence of joints, or nodes: hence the name arthrophyta, which means this?   Read this paragraph and choose the correct option from the provided answers:  The stem of a horsetail is characterized by the presence of joints, or nodes: hence the name Arthrophyta, which means “jointed plant”. Leaves and branches come out as whorls from the evenly spaced rings. The needle-shaped leaves do not contribute greatly to photosynthesis, the majority of which takes place in the green stem (Figure 14.15).   Choices:  - solid plant  - molted plant  - elongated plant  - jointed plant   A:
Ans: jointed plant


(Q).
Q: Over time, deposited sediments may harden into what?   Read this paragraph and choose the correct option from the provided answers:  Over time, deposited sediments may harden into rock. First, the sediments are compacted . That is, they are squeezed together by the weight of sediments on top of them. Next, the sediments are cemented together. Minerals fill in the spaces between the loose sediment particles. These cementing minerals come from the water that moves through the sediments. Sedimentary rocks that form from sediments are called “clastic rocks. “ Clastic rocks are rock fragments that are compacted and cemented together ( Figure below ).   Choices:  - coral  - fossils  - deltas  - rocks   A:
(A).
rocks


Ques:Q: Movement of water and minerals in the xylem solutes, pressure, gravity, and matric potential are all important for what?   Read this paragraph and choose the correct option from the provided answers:  Movement of Water and Minerals in the Xylem Solutes, pressure, gravity, and matric potential are all important for the transport of water in plants. Water moves from an area of higher total water potential (higher Gibbs free energy) to an area of lower total water potential. Gibbs free energy is the energy associated with a chemical reaction that can be used to do work. This is expressed as ΔΨ. Transpiration is the loss of water from the plant through evaporation at the leaf surface. It is the main driver of water movement in the xylem. Transpiration is caused by the evaporation of water at the leaf–atmosphere interface; it creates negative pressure (tension) equivalent to –2 MPa at the leaf surface. This value varies greatly depending on the vapor pressure deficit, which can be negligible at high relative humidity (RH) and substantial at low RH. Water from the roots is pulled up by this tension. At night, when stomata shut and transpiration stops, the water is held in the stem and leaf by the adhesion of water to the cell walls of the xylem vessels and tracheids, and the cohesion of water molecules to each other. This is called the cohesion–tension theory of sap ascent. Inside the leaf at the cellular level, water on the surface of mesophyll cells saturates the cellulose microfibrils of the primary cell wall. The leaf contains many large intercellular air spaces for the exchange of oxygen for carbon dioxide, which is required for photosynthesis. The wet cell wall is exposed to this leaf internal air space, and the water on the surface of the cells evaporates into the air spaces, decreasing the thin film on the surface of the mesophyll cells. This decrease creates a greater tension on the water in the mesophyll cells (Figure 30.34), thereby increasing the pull on the water in the xylem vessels. The xylem vessels and tracheids are structurally adapted to cope with large changes in pressure. Rings in the vessels maintain their tubular shape, much like the rings on a vacuum cleaner hose keep the hose open while...   Choices:  - produce water transport  - Moving Water Transport  - increase water transport  - plant water transport   A:

Ans:plant water transport


Question: Q: What is the name of the sugar that plants produce to be used as food?   Read this paragraph and choose the correct option from the provided answers:     Choices:  - glucosamine  - chlorophyll  - insulin  - glucose   A:
Answer:

assistant: glucose