Answer the following question given this paragraph: Platelets and Coagulation Factors Blood must clot to heal wounds and prevent excess blood loss. Small cell fragments called platelets (thrombocytes) are attracted to the wound site where they adhere by extending many projections and releasing their contents. These contents activate other platelets and also interact with other coagulation factors, which convert fibrinogen, a water-soluble protein present in blood serum into fibrin (a non-water soluble protein), causing the blood to clot. Many of the clotting factors require vitamin K to work, and vitamin K deficiency can lead to problems with blood clotting. Many platelets converge and stick together at the wound site forming a platelet plug (also called a fibrin clot), as illustrated in Figure 40.8b. The plug or clot lasts for a number of days and stops the loss of blood. Platelets are formed from the disintegration of larger cells called megakaryocytes, like that shown in Figure 40.8a. For each megakaryocyte, 20003000 platelets are formed with 150,000 to 400,000 platelets present in each cubic millimeter of blood. Each platelet is disc shaped and 24 m in diameter. They contain many small vesicles but do not contain a nucleus. Q: Thrombocytes are more commonly known by what name? Choices: - chromosomes - molecules - droplets - platelets A:
platelets
(Question)
Answer the following question given this paragraph: A lipid is an organic compound such as fat or oil. Organisms use lipids to store energy, but lipids have other important roles as well. Lipids consist of repeating units called fatty acids. Fatty acids are organic compounds that have the general formula CH 3 (CH 2 ) n COOH, where n usually ranges from 2 to 28 and is always an even number. There are two types of fatty acids: saturated fatty acids and unsaturated fatty acids. Q: What do organisms use to store energy? Choices: - tissues - proteins - metabolytes - lipids A:
(Answer)
lipids
Ques: Answer the following question given this paragraph: All waves are the way energy travels through matter. Ocean waves are energy traveling through water. They form when wind blows over the surface of the ocean. Wind energy is transferred to the sea surface. Then, the energy is carried through the water by the waves. Figure below shows ocean waves crashing against rocks on a shore. They pound away at the rocks and anything else they strike. Q: All waves are the way energy travels through what? Choices: - time - vacuums - space - matter A:
Ans: matter
(Q).
Answer the following question given this paragraph: This represents a human egg, which is the gamete, or reproductive cell, in females. Notice that is does not have a distinct shape, like a sperm cell has. The egg is a round cell with a haploid nucleus in the center. The egg contains most of the cytoplasm and organelles present in the first cell of a new organism. Q: What term means a reproductive cell, like the human egg in females? Choices: - embryo - zygote - sperm - gamete A:
(A).
gamete
Ques:Answer the following question given this paragraph: Q: Half of the neurons formed in the embryo are eliminated because of _____________ Choices: - cell death - disease - contraction - competition A:

Ans:competition
Answer the following question given this paragraph: The warm-air vent is placed near the floor of the room. Warm air is less dense than cold air so it rises. If the warm-air vent were placed near the ceiling instead, how would this affect the transfer of thermal energy throughout the room?. Q: What property of warm air causes it to rise above cold air? Choices: - greater pressure - greater density - higher temperature - lower density A:
lower density