Answer the following question given this paragraph: Vestigial structures, or structures that have lost their use through evolution, are important evidence of evolution. Q: What do we call structures that have lost their use through evolution, which serve as important evidence of evolution? Choices: - extinct - adaptative - primordial - vestigial A:
vestigial
Answer the following question given this paragraph: Sahara Desert in northern Africa (left). Rainforest in northeastern Australia (right). Two very different biomes are pictured here. A biome is a group of similar ecosystems with the same general abiotic factors and primary producers. Both are found at roughly the same distance from the equator. Q: What is a group of similar ecosystems with the same general abiotic factors and primary producers called? Choices: - ecological environment - ecoculture - population - biome A:
biome
Q: Answer the following question given this paragraph: Feldspar and quartz are the two most common silicates. In beryl, the silicate pyramids join together as rings. Biotite is mica. The silicate pyramids come together to create thin, flexible sheets. Compare the beryl and the biotite pictured below ( Figure below ). Q: What are the two most common silicates? Choices: - Analcime and Feldspar - Petalite and Quartz - Petalite and Analcime - feldspar and quartz A:
A: feldspar and quartz
Question: Answer the following question given this paragraph: A lever is a simple machine that consists of a bar that rotates around a fixed point called the fulcrum. There are three classes of levers. Depending on its class, a lever may have an ideal mechanical advantage that is less than, equal to, or greater than 1. First-class levers also change the direction of the input force. Q: What simple machine consists of a bar that rotates around a fixed point called the fulcrum? Choices: - battering ram - rotor - catapult - lever A:
Answer: lever
*Question*
Answer the following question given this paragraph: Caecilians The caecilian order is the amphibian order with the fewest species. Caecilians are closely related to salamanders. They have a long, worm-like body. They are the only amphibians without legs. Caecilians evolved from a four-legged ancestor but lost their legs later in their evolution. As adults, they often burrow into the soil. That's one reason why Caecilians tend to be less well known than other amphibians. microcaecilia. Q: What are the only amphibians without legs? Choices: - newts - crustaceans - porifera - caecilians A:
**Answer**
caecilians
(Q).
Answer the following question given this paragraph: Newton's second law shows that there is a direct relationship between force and acceleration. The greater the force that is applied to an object of a given mass, the more the object will accelerate. For example, doubling the force on the object doubles its acceleration. The relationship between mass and acceleration, on the other hand, is an inverse relationship. The greater the mass of an object, the less it will accelerate when a given force is applied. For example, doubling the mass of an object results in only half as much acceleration for the same amount of force. Q: Which of newton's law shows that there is a direct relationship between force and acceleration? Choices: - third - none of the above - first - second A:
(A).
second