Answer:
The sun
Explanation:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs.
If water had weak surface tension, insects would not be able to land on or walk on water.
Surface tension is the force acting on the surface of water that makes it to behave like a stretched elastic skin.
Surface tension owes to the intermolecular attraction between water molecules. The molecules at the surface of water are drawn inwards by other molecules causing the molecules at the surface to contract. This surface tension enables insects to land on or walk on water.
So, without surface tension of water, insects would not be able to land on or walk on water.
Lear more: brainly.com/question/23980999
Pancytopenia refers to the deficient production of all cellular elements of the blood. So, the correct option is (c).
A person with pancytopenia has too few platelets, white blood cells, and red blood cells in their body. A few autoimmune, bone marrow, or genetic conditions can result in pancytopenia. Infection, poor nutrition, pregnancy, cancer treatment (such as chemotherapy or radiation therapy), or exposure to specific poisons, chemicals, or medications are other potential causes.
Pancytopenia is a dangerous condition that should not be disregarded. Without treatment, it can result in symptoms that are life-threatening and have an impact on the entire body, like as oxygen shortage and immune system issues.
Learn more about Pancytopenia here;
brainly.com/question/27960796
#SPJ4
In passive transport, substances simply move from an area of higher concentration to an area of lower concentration, which does not require the input of energy. Concentration gradient, size of the particles that are diffusing, and temperature of the system affect the rate of diffusion
