Answer the following question given this paragraph: Elongation is the addition of nucleotides to the mRNA strand. Q: Elongation is the addition of what to the mrna strand? Choices: - codons - glycine - filaments - nucleotides A:
nucleotides
(Question)
Answer the following question given this paragraph: Glial Cells of the CNS One cell providing support to neurons of the CNS is the astrocyte, so named because it appears to be star-shaped under the microscope (astro- = "star"). Astrocytes have many processes extending from their main cell body (not axons or dendrites like neurons, just cell extensions). Those processes extend to interact with neurons, blood vessels, or the connective tissue covering the CNS that is called the pia mater (Figure 12.11). Generally, they are supporting cells for the neurons in the central nervous system. Some ways in which they support neurons in the central nervous system are by maintaining the concentration of chemicals in the extracellular space, removing excess signaling molecules, reacting to tissue damage, and contributing to the blood-brain barrier (BBB). The blood-brain barrier is a physiological barrier that keeps many. Q: Contributing to the blood-brain barrier is one of the jobs of glial cells, which support neurons in what system? Choices: - peripheral nervous system - circulatory system - digestive system - central nervous system A:
(Answer)
central nervous system
Ques: Answer the following question given this paragraph: Lifecycle of Leukocytes Most leukocytes have a relatively short lifespan, typically measured in hours or days. Production of all leukocytes begins in the bone marrow under the influence of CSFs and interleukins. Secondary production and maturation of lymphocytes occurs in specific regions of lymphatic tissue known as germinal centers. Lymphocytes are fully capable of mitosis and may produce clones of cells with identical properties. This capacity enables an individual to maintain immunity throughout life to many threats that have been encountered in the past. Q: Characterized by a short lifespan, what begin with production in the bone marrow under the influence of csfs and interleukins? Choices: - solutes - pathogens - erythrocytes - leukocytes A:
Ans: leukocytes
(Q).
Answer the following question given this paragraph: Deer ticks are vectors for the bacteria that cause Lyme disease. The ticks are actually very small and may go unnoticed. Q: Deer ticks are vectors for the bacteria that cause what disease? Choices: - Dengue fever - malaria - mad cow - lyme A:
(A).
lyme
Ques:Answer the following question given this paragraph: When you pluck a guitar string, the resulting sound has a steady tone and lasts a long time. Each successive vibration of the string takes the same time as the previous one. We define periodic motion to be a motion that repeats itself at regular time intervals, such as exhibited by the guitar string or by an object on a spring moving up and down. The time to complete one oscillation remains constant and is called the period T . Its units are usually seconds, but may be any convenient unit of time. The word period refers to the time for some event whether repetitive or not; but we shall be primarily interested in periodic motion, which is by definition repetitive. A concept closely related to period is the frequency of an event. For example, if you get a paycheck twice a month, the frequency of payment is two per month and the period between checks is half a month. Frequency f is defined to be the number of events per unit time. For periodic motion, frequency is the number of oscillations per unit time. The relationship between frequency and period is. Q: What term describes motion that repeats itself at regular time intervals, such as exhibited by a vibrating guitar string? Choices: - gravitational pull - specific speed - apparent motion - periodic motion A:

Ans:periodic motion
Answer the following question given this paragraph: Weathering changes solid rock into pieces. These pieces are called sediments. Sediments are described in the chapter Earth's Materials and Crust . Sediments are different sizes of rock particles. Boulders are sediments; so is gravel. At the other end, silt and clay are also sediments. Weathering may also cause the minerals at the Earth's surface to change form. The new minerals that form are stable at the Earth's surface. There are two types of weathering, mechanical and chemical. These are discussed in the next two concepts. Q: Over time, what changes solid rock into pieces? Choices: - metamorphosis - creep - leaching - weathering A:
weathering