Answer the following question given this paragraph: A seismograph is a machine that records seismic waves. In the past, seismographs produced a seismogram . A seismogram is a paper record of the seismic waves the seismograph received. Seismographs have a weighted pen suspended from a stationary frame. A drum of paper is attached to the ground. As the ground shakes in an earthquake, the pen remains stationary but the drum moves beneath it. This creates the squiggly lines that make up a seismogram ( Figure below ). Q: What is used to record seismic waves? Choices: - transmitter - odometer - topometer - seismograph A:
seismograph
(Question)
Answer the following question given this paragraph: The cell starting meiosis is called a primary oocyte, as shown in Figure 43.13. This cell will start the first meiotic division and be arrested in its progress in the first prophase stage. At the time of birth, all future eggs are in the prophase stage. At adolescence, anterior pituitary hormones cause the development of a number of follicles in an ovary. This results in the primary oocyte finishing the first meiotic division. The cell divides unequally, with most of the cellular material and organelles going to one cell, called a secondary oocyte, and only one set of chromosomes and a small amount of cytoplasm. Q: The cell starting meiosis is called a what? Choices: - secondary oocyte - primary gamete - zygote - primary oocyte A:
(Answer)
primary oocyte
Ques: Answer the following question given this paragraph: Mammals are endothermic vertebrates with four limbs. Examples of mammals include bats, whales, mice, and humans. Clearly, mammals are a very diverse group. Nonetheless, they share several traits that set them apart from other vertebrates. Q: How many limbs do all mammals have? Choices: - three - it varies - two - four A:
Ans: four
(Q).
Answer the following question given this paragraph: Platelets You may occasionally see platelets referred to as thrombocytes, but because this name suggests they are a type of cell, it is not accurate. A platelet is not a cell but rather a fragment of the cytoplasm of a cell called a megakaryocyte that is surrounded by a plasma membrane. Megakaryocytes are descended from myeloid stem cells (see Figure 18.4) and are large, typically 50100 m in diameter, and contain an enlarged, lobed nucleus. As noted earlier, thrombopoietin, a glycoprotein secreted by the kidneys and liver, stimulates the proliferation of megakaryoblasts, which mature into megakaryocytes. These remain within bone marrow tissue (Figure 18.12) and ultimately form platelet-precursor extensions that extend through the walls of bone marrow capillaries to release into the circulation thousands of cytoplasmic fragments, each enclosed by a bit of plasma membrane. These enclosed fragments are platelets. Each megakarocyte releases 20003000 platelets during its lifespan. Following platelet release, megakaryocyte remnants, which are little more than a cell nucleus, are consumed by macrophages. Platelets are relatively small, 24 m in diameter, but numerous, with typically 150,000160,000 per L of blood. After entering the circulation, approximately one-third migrate to the spleen for storage for later release in response to any rupture in a blood vessel. They then become activated to perform their primary function, which is to limit blood loss. Platelets remain only about 10 days, then are phagocytized by macrophages. Platelets are critical to hemostasis, the stoppage of blood flow following damage to a vessel. They also secrete a variety of growth factors essential for growth and repair of tissue, particularly connective tissue. Infusions of concentrated platelets are now being used in some therapies to stimulate healing. Q: After entering the circulation, approximately one-third of platelets migrate to what organ for storage, to be released in response to any blood vessel rupture? Choices: - bladder - lungs - kidneys - spleen A:
(A).
spleen
Ques:Answer the following question given this paragraph: Q: Animals produce most of what chemicals, which are needed to synthesize the fatty acids they need? Choices: - carbohydrates - solvents - hormones - enzymes A:

Ans:enzymes
Ques:Answer the following question given this paragraph: Scientists find answers using tests : When scientists want to answer a question, they search for evidence using experiments. An experiment is a test to see if their explanation is right or wrong. Evidence is made up of the observations a scientist makes during an experiment. To study the cause of death in the chimpanzees, scientists may give the chimps nutrients in the form of nuts, berries, and vitamins to see if they are dying from a lack of food. This test is the experiment. If fewer chimps die, then the experiment shows that the chimps may have died from not having enough food. This is the evidence. Q: What is the term for a test to see if a scientific explanation is right or wrong? Choices: - invention - hypothesis - generation - experiment A:

Ans:
experiment