CHAPTER 18 0.0 / 5 ? BiologyLife Cycles and Reproductive StrategiesAll LevelsAll boards Created by: ALK756Created on: 18-10-15 13:12 What is a life cycle? A sequence of stages in the growth and development of organisms from one generation to the next. 1 of 15 What is the alternation of generations? refers to alternating haploid and diploid states. 2 of 15 What is a hermaphrodite? An animal that can produce sperm and eggs. 3 of 15 What is indirect development? occurs in animals that produce large numbers of eggs. (aquatic animals and amphibians). 4 of 15 What is direct development? it's when embryos develop for several weeks inside the eggs, and hatch in an essentially adult form. 5 of 15 What is in-vitro fertilisation? This method involves fertilising eggs in a lab. 6 of 15 What is contraception? Preventing sperm and egg from meeting. (condoms, diaphragms and contraceptive pills are examples) 7 of 15 What is self-fertilisation? This happens when pollen is transferred to a stigma on the same plant. 8 of 15 What is apomixis? it's when the megaspore undergoes mitosis and develops as an embryo. 9 of 15 What is metamorphosis? An abrupt change in body structure. 10 of 15 What is a placenta? it's a specialised exchange organ found in most mammals. 11 of 15 What is the substance in an egg that contains food for the embryo? Yolk 12 of 15 What is copulation? Depositing sperm inside the female's reproductive tract. 13 of 15 What is a type of sound wave that is too high in frequency for humans to hear? Ultrasound 14 of 15 The ability of plants to produce a completely new indiviudal from one cell is called Totipotent 15 of 15
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