Q: Which crust lies deep inside the ocean? Read this paragraph and choose the correct option from the provided answers: The oldest crust is coldest and lies deepest in the ocean. Choices: - shallowest - youngest - thickest - oldest A:
oldest

(Question)
Q: When electric current flows through a wire, it creates what type of field that surrounds the wire in circles? Read this paragraph and choose the correct option from the provided answers: Electromagnetism is magnetism produced by an electric current. When electric current flows through a wire, it creates a magnetic field that surrounds the wire in circles. You can see this in the diagram below. Note that electric current is conventionally shown moving from positive to negative electric potential, as in this diagram. However, electrons in current actually flow in the opposite direction, from negative to positive potential. Choices: - gravitational - kinetic - thermal - magnetic A:
(Answer)
magnetic

Ques: Q: How the individuals in a population are spread throughout their habitat is referred to as what? Read this paragraph and choose the correct option from the provided answers: Population density just represents the average number of individuals per unit of area or volume. Often, individuals in a population are not spread out evenly. Instead, they may live in clumps or some other pattern (see Figure below ). The pattern may reflect characteristics of the species or its environment. Population distribution describes how the individuals are distributed, or spread throughout their habitat. Choices: - habitual distribution - population habitation - population spread - population distribution A:
Ans: population distribution

(Q).
Q: What is the name of the process where light is produced without heat? Read this paragraph and choose the correct option from the provided answers: Some objects produce light without becoming very hot. They generate light through chemical reactions or other processes. Producing light without heat is called luminescence . Luminescence, in turn, can occur in several different ways:. Choices: - radiation - effervescence - fluorescence - luminescence A:
(A).
luminescence

Ques:Q: What kind of relay occurs between the uterus, hypothalamus, and the posterior pituitary to assure an adequate supply of the hormone oxytocin during childbirth? Read this paragraph and choose the correct option from the provided answers: Labor and Birth Labor is the physical efforts of expulsion of the fetus and the placenta from the uterus during birth (parturition). Toward the end of the third trimester, estrogen causes receptors on the uterine wall to develop and bind the hormone oxytocin. At this time, the baby reorients, facing forward and down with the back or crown of the head engaging the cervix (uterine opening). This causes the cervix to stretch and nerve impulses are sent to the hypothalamus, which signals for the release of oxytocin from the posterior pituitary. The oxytocin causes the smooth muscle in the uterine wall to contract. At the same time, the placenta releases prostaglandins into the uterus, increasing the contractions. A positive feedback relay occurs between the uterus, hypothalamus, and the posterior pituitary to assure an adequate supply of oxytocin. As more smooth muscle cells are recruited, the contractions increase in intensity and force. There are three stages to labor. During stage one, the cervix thins and dilates. This is necessary for the baby and placenta to be expelled during birth. The cervix will eventually dilate to about 10 cm. During stage two, the baby is expelled from the uterus. The uterus contracts and the mother pushes as she compresses her abdominal muscles to aid the delivery. The last stage is the passage of the placenta after the baby has been born and the organ has completely disengaged from the uterine wall. If labor should stop before stage two is reached, synthetic oxytocin, known as Pitocin, can be administered to restart and maintain labor. An alternative to labor and delivery is the surgical delivery of the baby through a procedure called a Caesarian section. This is major abdominal surgery and can lead to post-surgical complications for the mother, but in some cases it may be the only way to safely deliver the baby. Choices: - pressure feedback - affirmative feedback - currents feedback - positive feedback A:

Ans:positive feedback

Question: Q: A pulley is a simple machine that consists of a grooved wheel and? Read this paragraph and choose the correct option from the provided answers: Another simple machine that uses a wheel is the pulley. A pulley is a simple machine that consists of a rope and grooved wheel. The rope fits into the groove in the wheel, and pulling on the rope turns the wheel. Figure below shows two common uses of pulleys. Choices: - a battery - a wedge - a lever - a rope A:
Answer:
a rope