What Is The Difference Between A “theory” As The Word Is Commonly Used, And A Scientific Theory

What is the difference between a “theory” as the word is commonly used, and a scientific theory? A. An everyday theory is an idea and a scientific theory is a fact. B. An everyday theory is a fact, and a scientific theory is an idea. C. They are the same thing. D. An everyday theory can be wrong and a scientific theory never is. E. An everyday theory is a guess and a scientific theory has been repeatedly tested. QUESTION 7 What is unique about embryonic stem cells? A. They are haploid. B. They can produce their own placenta, C. They can produce all the types of cells that make up a human. D. They are the smallest human cells. E. They are protected by law. Why is it important that gametes be haploid? A. Because if they weren’t they could not properly join at fertilization and there could be no reproduction B. Because if they weren’t, when they joined at fertilization the resulting zygote would have twice the normal number of chromosomes. C. Because they need to have extra chromosomes to develop into a complete organism. D. Because the sperm and egg cells need to be very small. E. It isn’t really important. That’s just how it works. Menstruation is part of the uterine cycle. Why does it happen? A. When an egg is released, the endometrium or uterine lining develops to support an embryo in case of pregnancy. If pregnancy does not occur, the lining is shed. B. When an egg is released, there is also a release of endometrial fluid from the ruptured follicle. This must be shed in order to prepare the uterus for possible pregnancy. C. Estrogen levels increase at ovulation, causing the development of the endometrial vaginal lining in preparation for pregnancy. If there is no pregnancy, the lining is shed. D. Scientists have not entirely explained why women menstruate. E. The corpus luteum secretes estrogen and progesterone, causing development of the endometrial ovarian lining in preparation for possible pregnancy. If no pregnancy occurs, hormone levels plummet and the lining is shed. Which of the following is an example of natural selection. A. Rabbits run faster when they’re chased by wolves than by foxes. B. As the climate cools during the winter, birds eat more to maintain their temperature and energy level. C. Turtles swim over whenever people come near a pond because they’ve adapted to being fed. D. Deer learn to avoid the section of forest open for hunting, E. As the climate warms over time, the fur coats on a population of black bears get thinner. According to Darwin, how did “descent with modification” occur? A. Natural selection B. An Intelligent Designer at work C. Randomly D. Sexual reproduction E. Genetics and heredity
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