What are the 8 lab safety rules? General Laboratory Safety Rules Know locations of laboratory safety showers, eyewashstations, and fire extinguishers. Know emergency exit routes. Avoid skin and eye contact with all chemicals. Minimize all chemical exposures. No horseplay will be tolerated. Assume that all chemicals of unknown toxicity are highly toxic. What are the […]
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 […]
What are the three levels of physical activity?
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 […]
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 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. […]
What is homeostasis in cells?
What is homeostasis in cells? In biology, homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). What is homeostatic imbalance […]
What will happen when a force is applied on a moving object against the direction of motion?
What is light quality?
What is light quality? Light quality is the wavelength (in nanometers, nm) within the electromagnetic spectrum; i.e. blue light is 450 nm and red light is 650 nm. Each wavelength has a different packet of radiation or energy (in J mol-1) called photons. What type of light causes damage to plants? UV-B radiation has been […]