Answer the following question given this paragraph: Glaciers cause erosion by plucking and abrasion. Valley glaciers form several unique features through erosion, including cirques, aretes, and horns. Q: Which type of glaciers form several unique features through erosion, including cirques, aretes, and horns? Choices: - line glaciers - deep glaciers - icebergs - valley glaciers A:
valley glaciers
Answer the following question given this paragraph: Reptiles typically reproduce sexually and lay eggs. Q: How do reptiles typically reproduce? Choices: - cloning - live birth - asexually - sexually A:
sexually
Q: Answer the following question given this paragraph: The universe has many remarkable qualities, among them a rather beautiful symmetry: the total amount of motion in the universe balances out always. This law only makes sense if we measure "motion" in a specific way: as the product of mass and velocity. This product, called momentum , can be exchanged from one object to another in a collision. The rapidity with which momentum is exchanged over time is determined by the forces involved in the collision. Conservation of momentum is one of the five fundamental conservation laws in the universe. The other four are conservation of energy, angular momentum, charge conservation and CPT conservation. Q: One of the five fundamental conservation laws in the universe refers to conservation of what, which is the product of mass and velocity? Choices: - fluid - energy - light - momentum A:
A: momentum
Question: Answer the following question given this paragraph: Fish have gills. Gills are organs behind the head that absorb oxygen from water. Water enters through the mouth, passes over the gills, and then exits the body. Q: What is the name for the organs behind the head of a fish that absorb oxygen from water? Choices: - pores - alveoli - lungs - gills A:
Answer: gills
*Question*
Answer the following question given this paragraph: form of mechanical weathering that occurs as water expands when it freezes, wedging apart rock. Q: What term describes weathering that occurs as water expands when it freezes, wedging apart rock? Choices: - chemical weathering - cleavage - erosion - mechanical weathering A:
**Answer**
mechanical weathering
Answer the following question given this paragraph: As the membrane depolarizes, another set of ion channels called voltage-gated sodium channels are triggered to open. Sodium ions enter the muscle fiber, and an action potential rapidly spreads (or "fires") along the entire membrane to initiate excitation-contraction coupling. Things happen very quickly in the world of excitable membranes (just think about how quickly you can snap your fingers as soon as you decide to do it). Immediately following depolarization of the membrane, it repolarizes, re-establishing the negative membrane potential. Meanwhile, the ACh in the synaptic cleft is degraded by the enzyme acetylcholinesterase (AChE) so that the ACh cannot rebind to a receptor and reopen its channel, which would cause unwanted extended muscle excitation and contraction. Propagation of an action potential along the sarcolemma is the excitation portion of excitation-contraction coupling. Recall that this excitation actually triggers the release of calcium ions (Ca++) from its storage in the cell's SR. For the action potential to reach the membrane of the SR, there are periodic invaginations in the sarcolemma, called T-tubules ("T" stands for "transverse"). You will recall that the diameter of a muscle fiber can be up to 100 m, so these T-tubules ensure that the membrane can get close to the SR in the sarcoplasm. The arrangement of a T-tubule with the membranes of SR on either side is called a triad (Figure 10.7). The triad surrounds the cylindrical structure called a myofibril, which contains actin and myosin. Q: What is the arrangement of a t-tubule with the membranes of sr on either side called? Choices: - aracnid - orchid - acid - triad A:
triad