Ques: Q: What helps push the fetus from the uterus during birth? Read this paragraph and choose the correct option from the provided answers: Near the time of birth, the amniotic sac breaks in a gush of liquid. Labor usually begins within a day of this event. Labor involves contractions of the muscular walls of the uterus. With the mother's help, the contractions eventually push the fetus out of the uterus and through the vagina. Choices: - glands - tremors - Shaking - contractions A:
Ans: contractions

Ques: Q: What is created when the wave source moves faster than the wave propagation speed? Read this paragraph and choose the correct option from the provided answers: Sonic booms are one example of a broader phenomenon called bow wakes. A bow wake, such as the one in Figure 17.19, is created when the wave source moves faster than the wave propagation speed. Water waves spread out in circles from the point where created, and the bow wake is the familiar V-shaped wake trailing the source. A more exotic bow wake is created when a subatomic particle travels through a medium faster than the speed of light travels in that medium. (In a vacuum, the maximum 8 speed of light will be c = 3.0010 m/s ; in the medium of water, the speed of light is closer to 0.75c . If the particle creates light in its passage, that light spreads on a cone with an angle indicative of the speed of the particle, as illustrated in Figure 17.20. Such a bow wake is called Cerenkov radiation and is commonly observed in particle physics. Choices: - loop wake - piece wake - superceding wake - bow wake A:
Ans: bow wake

Ques: Q: A membrane has what property if it can control what molecules or ions enter or leave the cell? Read this paragraph and choose the correct option from the provided answers: Probably the most important feature of a cell's phospholipid membranes is that they are selectively permeable or semipermeable . A membrane that is selectively permeable has control over what molecules or ions can enter or leave the cell, as shown in Figure below . The permeability of a membrane is dependent on the organization and characteristics of the membrane lipids and proteins. In this way, cell membranes help maintain a state of homeostasis within cells (and tissues, organs, and organ systems) so that an organism can stay alive and healthy. Choices: - indiscreet permeability - impermeability - susceptible permeability - selective permeability A:
Ans: selective permeability

Ques: Q: Because their cells are arranged in bundles, the appearance of skeletal and cardiac muscles is described as what? Read this paragraph and choose the correct option from the provided answers: http://zonalandeducation. com/mstm/physics/mechanics/vectors/introduction/introductionVectors. html. Choices: - quadrant - cylindrical - incised - striated A:
Ans:
striated