Science Fact File Grade 8| Chapter # 3 | Complete Chapter| Test Yourself Q/A

Science Fact File Grade 8 Oxford | Chapter # 3, Variations, Heredity and Cell Division| Complete Chapter| Test Yourself Q/A 0:11 Test Yourself, Page # 40 0:28 Test Yourself, Page # 41 0:46 Test Yourself, Page # 42 0:58 Test Yourself, Page # 44 1:25 Test Yourself, Page # 45 0:51 Test Yourself, Page # 46 2:11 Test Yourself, Page # 42 2:54 Test Yourself, Page # 50 0:46 Test Yourself, Page # 42 3:15 Test Yourself, Page # 54 Questions covered in this video: To which species do human beings belong? List four common things and four differences between the people in the photograph. Where do people get their characteristics from? What do scientists call these differences? What is a) Laila’s height? b) Kulsoom’s eye color? c) Sara’s hair color? What is the most common a) shoe size? b) eye color? Describe a) Mahir b) Javed Suggest how this table might change after three years. There is variation in your class. What does this mean? Describe a normal distribution curve. Explain what it means. Say which of the following are examples of continuous or discontinuous variation: Weight, Tongue rolling, Height, Eye color, Earlobes, Freckles What are arctic conditions? How do these features help a polar bear survive? Small ears, Thick layer of blubber, Big feet Describe a polar bear's fur How does this help a polar bear survive? Small animals have a large surface area compared to their volume. Explain why small animals that live in arctic conditions have to hibernate in winter. What are desert conditions? How do these features help a camel survive? Big feet, Long eyelashes, A hump, A bald tummy Explain how a camel can go for long periods without drinking water. Describe the adaptations that help cacti survive in desert conditions. Explain the difference between a variation and an adaptation. Explain why a person having a long neck is not an adaptation. What is heredity? What is genetics? Do some research on Gregor Mendel. Find out about his experiments and what his major discoveries were. What are chromosomes? What are genes made of? What is an allele? Explain the difference between a dominant and recessive gene allele. What does 'hybrid' mean? Explain the difference between homozygous and heterozygous. Explain how a person with black hair could be either homozygous or heterozygous. What does DNA stand for? What is DNA? Describe the shape of a DNA molecule. Why do you think there are so many genes on one chromosome? Why do living things need to produce new cells all of the time? What is the difference between mitosis and meiosis? What happens to the number of chromosomes before a cell divides by mitosis? What are the four stages of mitosis? What happens to the number of chromosomes at meiosis? Suggest why organisms that are produced by asexual reproduction are identical to each other. Explain how a mutation might happen. How might a mutation affect an organism? #answerbuddy #davidcoppock #chapter3 #grade8 #oxford #sciencefactfile #sciencefacts #third_edition #learning #questionanswer #testyourself