How do plate movements help to form igneous rocks? Igneous Rocks and Plate Tectonics At convergent plate boundaries, sedimentary rock from the ocean floor gets pushed down into the mantle. The crust increases in temperature as it dives deeper into the mantle. Eventually, the crust melts and rises to the surface causing a volcanic eruption, […]

Why should you always wear a personal flotation device PFD or lifejacket when on board a boat? Remember, conditions can change very quickly on the water and PFDs take time to put on even if they are close at hand. Often you will not have time to put on a PFD in the event of […]

Why do the tops of trees change color first? Trees Change Color from the Crown, Down And since these lofty leaves are the most exposed to light, by that same respect, they’re also the first to respond to fall’s lessening daylight hours — another event which results in the slowdown of chlorophyll and the promoting […]

What is the composition of bacterial cell wall? The bacterial cell wall consists of peptidoglycan, an essential protective barrier for bacterial cells that encapsulates the cytoplasmic membrane of both Gram-positive and Gram-negative bacterial cells. Peptidoglycan is a rigid, highly conserved, complex structure of polymeric carbohydrates and amino acids. What is the location and composition of […]

What is the role of hemoglobin in the body Brainly? Answer: Hemoglobin is the oxygen transporting protein of red blood cells.It carry oxygen and transport it throughout the body via blood circulation. Why does fetal hemoglobin have a different binding curve? Hemoglobin F has a different composition from the adult forms of hemoglobin, which allows […]

Why are antibiotics appropriate for treating the common cold? Because antibiotics only fight bacteria, and not viruses, they’re usually ineffective against colds. Sometimes a cold may lead to a bacterial infection, though. In that case, antibiotics would have a benefit if they were able to prevent that kind of infection. Why do I feel worse […]

Is zygote a stem cell? The zygote or fertilized egg is, of course, a totipotent stem cell. The known and well characterized totipotent stem cells are found only in early embryonic tissues and derive usually from the first few cell divisions after fertilization. Why are stem cells called stem cells? The term stem cell originated […]

What hormone regulates carbohydrate metabolism? Insulin is the key hormone of carbohydrate metabolism, it also influences the metabolism of fat and proteins. It lowers blood glucose by increasing glucose transport in muscle and adipose tissue and stimulates the synthesis of glycogen, fat, and protein. What is the effect of growth hormone on carbohydrate metabolism? Fat […]

What percentage of the economy is consumer spending? 70% How do buying and selling help the economy? In a competitive economic system, a large number of people and businesses buy and sell products freely in the marketplace. It leads to better and more diverse products, keeps prices stable, and increases the efficiency of producers. Is […]

What does pollen grain mean? : one of the granular microspores that occur in pollen and give rise to the male gametophyte of a seed plant. What is a pollen grain quizlet? pollen grain. a reproductive structure that contains the male gametes of seed plants. pollination. the transfer of pollen from the male part to […]