What substances do the kidneys excrete from the blood? Your kidneys remove wastes and extra fluid from your body. Your kidneys also remove acid that is produced by the cells of your body and maintain a healthy balance of water, salts, and minerals—such as sodium, calcium, phosphorus, and potassium—in your blood. What substances are secreted […]

What is the reason why gymnosperms have needle-like leaves? Conifers have needle-like leaves to hold more moisture and reduce wind resistance. What is the advantage of evergreen leaves? THE evergreen habit in plants has a number of obvious advantages, such as the conservation of energy and the capacity to indulge in photosynthesis over a considerable […]

Which type of media contain at least one ingredient that is not chemically defined? Synthetic media contain pure organic and inorganic compounds that are chemically defined (i.e. known molecular formula). Complex or enriched media contain ingredients that are not chemically defined or pure (i.e. animal extracts). Enriched media are used to grow fastidious bacteria. What […]

What is the balanced chemical equation for the combustion of ethane? Watch a tutorial on balancing C2H6 + O2 = CO2 + H2O (Ethane Combustion Reaction). What is the combustion of ethane? 2 C2H6 + 4 O2 → 2 C + 2 CO + 6 H2O + energy etc. Combustion occurs by a complex series […]

What elements have properties of both metals and nonmetals? The elements boron, silicon, germanium, arsenic, antimony, and tellurium separate the metals from the nonmetals in the periodic table. These elements, called metalloids or sometimes semimetals, exhibit properties characteristic of both metals and nonmetals. What is the only element that is a non metal but has […]

What type of membrane lines the compartments of the ventral body cavity and produces a lubricant that allows organisms to move against neighboring organs without friction? The ventral body cavity contains various serous membranes, which are filled with a watery substance that allows for lubrication and movement of organs: Pleura: the membrane that lines the […]

Why is burning coal bad for the environment? The burning of fossil fuels releases greenhouse gases into the atmosphere, increasing levels of CO2 and other gasses, trapping heat, and contributing to global climate change. Coal combustion releases the greenhouse gases carbon dioxide (CO2) and nitrous oxide (N2O) during combustion. Which of the following problem is […]

What are two characteristics of salt water? Salt water or seawater has characteristics similar to fresh water with some noticeable differences because of the salts that are dissolved in water. The viscosity (i.e., internal resistance to flow) of seawater, for example, is higher than that of fresh water because of its higher salinity. How would […]

What is the importance of root pressure? Root pressure, in plants, force that helps to drive fluids upward into the water-conducting vessels (xylem). What are the materials you have used to know the root pressure of a plants? Capillary tube and a manometer is used to study the root pressure. Explanation: The root pressure is […]

Where is the water moving the fastest in a stream? 1. Toward the middle of a river, water tends to flow fastest; toward the margins of the river it tends to flow slowest. 2. In a meandering river, water will tend to flow fastest along the outside bend of a meander, and slowest on the […]