Answer:
Three influenza pandemics occurred during the 20th century: the 1918-19 “Spanish flu,” the 1957-58 “Asian flu,” and the 1968-69 pandemic or “Hong Kong flu.” In 2009, the World Health Organization (WHO) declared a global pandemic of H1N1 flu.
Explanation:
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<span>All of these are examples of Polygenic inheritance (Answer choice D). This is because there are multiple genes that control skin or fur color, or height, and the physical form (phenotype) is the result of a coordination of different genes (genotype). These three physical characteristics are complex in nature, there is not just one gene that controls them.</span>
Answer:
heterotrophs survive through respiration, using oxygen and an energy source (carbohydrates, fats or protein) to produce ATP, which powers cells. They depend on other organisms for food and oxygen. Photosynthesis benefits heterotrophs in several different ways. First, "photosynthesis consumes carbon dioxide (a waste product of respiration) and produces oxygen (necessary for respiration)." Heterotrophs therefore depend on photosynthesis as a source of oxygen. In addition, "photosynthesis sustains the organisms that heterotrophs consume in order to stay alive. Even if a heterotroph is strictly carnivorous and does not eat plants, it must eat animals that eat plants to survive."
Answer:
64 g of O₂ is consumed in this reaction.
Explanation:
Mass of H₂O = 72 g
Mass of H₂ = 8 g
So, mass of O₂ consumed = mass of H₂O - mass of H₂ = 72 - 8 = 64 g
64 g of O₂ is consumed in this reaction.
Answer: A.
Explanation:
The secondary growth of a plant happens in the vascular cambium. When the vascular cambium produces more tissues, it makes the stems thicker over time.
