CONTENT+FOR+THE+RETAKE+EXAM.+FIRST+TERM

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 * ** NATURAL SCIENCE. SECOND YEAR. FIRST TERM **
 * **__Try to Solve the following questions and ask your teacher if you have any doubt about them__** ||
 * 1.-Explain the following concepts: **
 * .-nutrition, interaction, reproduction, organic compounds **
 * 2.-Draw an eukaryotic animal cell, with all the organelles and the function of each organelle. **
 * 3.1.- What are the differences between prokaryotic and eukaryotic cells. **
 * 3.2.-Write down the three principles of the cell theory. **
 * 4.- Define the following terms: **
 * .- root hair cells, stomata, xylem sap (raw sap), phloem sap( elaborated sap) **
 * 5.- Explain the process of obtaining nutrients in plants **
 * 6.- ****How do plants absorb water and mineral salts from the ground?_ **
 * How does Carbon dioxide enter the plant?. **
 * What is the name of the process that enables plants to produce Carbohydrates and release Oxygen using sunlight? **
 * Where does cellular respiration take plac ****e? ****_**
 * What is the name of the process plants use to obtain Energy from sugars and Oxygen? ****_**
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">In which direction is xylem sap ( raw sap) distributed through the plant? ****_**


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">7.- Draw a chloroplast with all the substances that go in and out during photosynthesis. **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">8.- Draw a mitochondrion with all the substances that go in and out during cellular respiration. **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">9.- Define: Feeding, digestion, gastrovascular cavities, digestive tracts **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">10.- Explain the differences between tracheas and lungs **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">11.- Write down examples of organisms that breathe through the body surface and using gills. **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">12.- Explain the differences between open and closed circulatory system in animals **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">13.- What is excretion? **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">14.- Define: stimulus, receptor and effector **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">15.- What is the function of the chemoreceptor organs? Explain them. **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">16.- Define the following concepts: TROPISM, ENDOCRINE GLAND, PHOTONASTY **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">17.- Draw a neuron with all its components **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">18.- ****<span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;"> What kind of response is it when a carnivorous plant traps an insect in its leaves? Justify your answer ****_**


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">19.- What are the two coordination systems that almost all animals have. Explain the differences between them. **

__**<span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">The root of a tree grows towards a water source **__**___**
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">20.- Say which type of tropism or nastic response are described in the following examples: **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">The roots grow downwards because of gravity **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">A creeping plant twists around the trunk of a tree_ **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">21.- ****<span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">Explain the 3 processes involved in the interaction function. **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">22.- What are nastic movements and explain the types of nastic movements with examples. **


 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">24.- Define the following concepts: Neuron, nervous system, endocrine gland and hormone **
 * <span style="font-family: 'Times New Roman','serif'; font-size: 18.6667px;">25.- What are the most common responses in animals? Explain them. **