Answer the following question given this paragraph: Weight measures the force of gravity pulling downward on an object. The SI unit for weight, like other forces, is the Newton (N). On Earth, a mass of 1 kilogram has a weight of about 10 Newtons because of the pull of Earth's gravity. On the moon, which has less gravity, the same mass would weigh less. Weight is measured with a scale, like the spring scale shown in the Figure below . The scale measures the force with which gravity pulls an object downward. To delve a little deeper into weight and gravity, watch this video:. Q: What is the force that pulls downward on an object and is measured by weight? Choices: - strength - work - light - gravity A:
gravity
Answer the following question given this paragraph: Evidence from the fossil record can be combined with data from molecular clocks. A molecular clock uses DNA sequences (or the proteins they encode) to estimate relatedness among species. Molecular clocks estimate the time in geologic history when related species diverged from a common ancestor. Molecular clocks are based on the assumption that mutations accumulate through time at a steady average rate for a given region of DNA. Species that have accumulated greater differences in their DNA sequences are assumed to have diverged from their common ancestor in the more distant past. Molecular clocks based on different regions of DNA may be used together for more accuracy. Q: Species that have diverged from their common ancestors have greater differences in what? Choices: - life span - cell structure - immunology - dna sequence A:
dna sequence
Q: Answer the following question given this paragraph: Kinetic energy is the energy of moving matter. Things with kinetic energy can do work. Kinetic energy depends on an object's mass and velocity. Q: What is the energy of moving matter? Choices: - potential energy - binary energy - residual energy - kinetic energy A:
A: kinetic energy
Question: Answer the following question given this paragraph: Most arthropods have three body segments. The segments are the head, thorax, and abdomen. You can see the three segments in a range of arthropods in Figure below . In some arthropods, the head and thorax are joined together. Q: The three segments of arthropods are the head, thorax and what? Choices: - chest - antennae - appendages - abdomen A:
Answer: abdomen
*Question*
Answer the following question given this paragraph: Fragmentation occurs when a piece breaks off from a parent organism. Then the piece develops into a new organism. Sea stars, like the one in Figure below , can reproduce this way. In fact, a new sea star can form from a single "arm. ". Q: What's the term for a piece of an organism breaking off and forming a new organism? Choices: - depletion - improvization - extinction - fragmentation A:
**Answer**
fragmentation
(Q).
Answer the following question given this paragraph: Watch this video (http://openstaxcollege. org/l/vertebrate_evol) of biologist Mark Kirschner discussing the "flipping" phenomenon of vertebrate evolution. The nervous system is made up of neurons, specialized cells that can receive and transmit chemical or electrical signals, and glia, cells that provide support functions for the neurons by playing an information processing role that is complementary to neurons. A neuron can be compared to an electrical wireit transmits a signal from one place to another. Glia can be compared to the workers at the electric company who make sure wires go to the right places, maintain the wires, and take down wires that are broken. Although glia have been compared to workers, recent evidence suggests that also usurp some of the signaling functions of neurons. There is great diversity in the types of neurons and glia that are present in different parts of the nervous system. There are four major types of neurons, and they share several important cellular components. Q: The nervous system is made up of these? Choices: - fibers - blood cells - muscles - neurons A:
(A).
neurons