Answer:
D. Diffusion
Explanation:
The process of diffuse transports the substances in the direction of their concentration gradients. Diffusion of substance from the region of their higher to that of the lower concentration does not require any energy. Being a passive process, diffusion can be carried out by a cell irrespective of the status of its ATP supply. Therefore, an animal cell containing a small amount of cyanide can transport substances by diffusion.
Answer:
d. CT scans of the fossilized skulls of Hobbits suggest they were probably microcephalic modern Homo sapiens.
Explanation:
The work of Falk et al in 2007 compared the CT of microcephalic humans skulls and normal humans skulls, finding the variables that allow them to classified with 100% success. When compared with the skulls of the ‘Hobbits’ of Flores, the size is similar to the microcephalic skulls in humans but the shape features sort it with normal humans skulls. They concluded that the ‘Hobbits’ of Flores are a separate species.
Answer:
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Explanation:
D. Chemical bonds in food molecules are broken, releasing energy and allowing cells to use the energy to make ATP.
Answer:
The relationship between sunlight and chlorophyll is that chlorophyll absorbs sunlight and uses its energy to synthesise carbohydrates from CO2 and water.
These are both needed in photosynthesis because without sunlight and the chlorophyll, photosynthesis would not be able to synthesise carbohydrates from CO2.
Selective logging—the practice of removing one or two trees and leaving the rest intact—is often considered a sustainable alternative to clear-cutting, in which a large swath of forest is cut down, leaving little behind except wood debris and a denuded landscape
