Before the discovery of cells, people believed in the theory of spontaneous generation. According to this theory, living things
can come from nonliving things. On the basis of this theory, people believed that maggots that formed on cheese spontaneously arose from the cheese. Which two statements disprove this theory of spontaneous generation? All matter is made of cells.
All living things are made of cells.
Cells are generally microscopic and impossible to detect with the naked eye.
Living cells can only come from previously existing matter.
Cells form from previously existing cells.
The two statements that refute the theory of spontaneous generation are:
All living organisms are composed of cells.
Living cells can only originate from existing living material.
Explanation:
Spontaneous generation theory holds that living beings do not require similar organisms for their continuation. It claims that living entities can arise directly from non-living substances. For instance, it was believed that fleas arose from dust.
The decomposition of organic matter can cause the appearance of maggots. These examples illustrate that the statement asserting living cells can only arise from previously existing matter does not align with the spontaneous generation theory. Likewise, the notion that all living beings are made of cells is not applicable to this theory.
A corn leaf cell contains a greater number of chloroplasts used for light absorption compared to a corn stem cell. In contrast to stem cells, leaf cells generate more sugar due to the higher chlorophyll content essential for photosynthesis.
Zoe's leg bones provide essential support and structure. Muscles connect to these bones via tendons, resulting in movement of the bones when muscles contract. The joints in Zoe's legs facilitate bending and flexing in particular ways.
In the citric acid cycle, also referred to as the Kreb’s Cycle, the enzyme responsible for catalyzing oxidative decarboxylation reactions is α-Ketoglutarate dehydrogenase. This irreversible oxidative decarboxylation step generates NADH (equivalent to 2.5 ATP) and restores the 4C chain (excluding CoA).
