What are the three levels of physical activity? Exercise is categorized into three different intensity levels. These levels include low, moderate, and vigorous and are measured by the metabolic equivalent of task (aka metabolic equivalent or METs). The effects of exercise are different at each intensity level (i.e. training effect). What are the aims of […]
What are 5 facts about the Ring of Fire?
What are 5 facts about the Ring of Fire? 7 Hot Facts About the Pacific Ring of Fire It’s an International Sensation. Plate Tectonics Make the Whole Thing Possible. It’s Home to World’s Deepest Ocean Trench. It’s Littered With Volcanoes and Prone to Earthquakes. Its Quakes Aren’t Always Interconnected. It’s a Great Producer of Geothermal […]
What are the limitations of capture-recapture?
What are the limitations of capture-recapture? Mark / Recapture Techniques These techniques have a number of limitations: The animal usually needs to be captured to be marked, which may injure it, or alter its behaviour pattern. The mark used may harm the animal – for example a dot of a particular paint may turn out […]
Why do the bullet fired horizontally and the bullet dropped hit the ground at the same time?
Why do the bullet fired horizontally and the bullet dropped hit the ground at the same time? The fired bullet only experiences a horizontal force from the gun. The only vertical force acting on the fired bullet is gravity. Therefore, the fired bullet and the dropped bullet both experience the same exact downward force. This […]
How do plants maintain the amount of oxygen and carbon dioxide?
How do plants maintain the amount of oxygen and carbon dioxide? The balance of oxygen and carbondioxide is maintained in the atmosphere by the oxygen released by plants during photosynthesis and carbondioxide released by human,animals etc. The balance of oxygen and carbondioxide is made due to respreration and photosinthesis. What is the role of trees […]
What is another word for centi?
What is another word for centi? a combining form meaning “hundredth” or “hundred,” used in the formation of compound words: centiliter; centimeter; centipede. What does centi mean in Latin? Centi (symbol c) is a unit prefix in the metric system denoting a factor of one hundredth. Proposed in 1793, and adopted in 1795, the prefix […]
Do sponges have a heart?
Do sponges have a heart? In summary, sponges – or poriferans – do not have a true circulatory system as most animals do. There is no heart, there are no veins or arteries, and sponges do not have blood. Water is pulled into the sponge via internal choanocyte cells, which take in water through the […]
Was the Ark bigger than the Titanic?
What protects the cell and is selectively permeable?
What protects the cell and is selectively permeable? A selectively permeable (sometimes called semi-permeable) membrane allows some molecules across but not others. JOB: The cell membrane controls what enters and exits the cell and thus protects the cell. How do organelles help keep the cell alive? Core organelles are found in virtually all eukaryotic cells. […]