Diffusion. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. ... Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration.
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It stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include intermediary metabolism, growth, protein synthesis, and reproduction (cell division). The diverse functions of the ER are performed by distinct domains; consisting of tubules, sheets and the nuclear envelope.
The Gecko. While human-made devices inspired by gecko feet have emerged in recent years, enabling their wearers to slowly scale a glass wall, the possible applications of gecko-adhesion technology go far beyond Spiderman-esque antics. A researcher is looking into how the technology could be applied in a high-precision industrial setting, such as in robot arms used in manufacturing computer chips.
Answer:
B
Explanation:
<em>Respiration </em><em>can </em><em>happen</em><em> </em><em>without</em><em> </em><em>sunlight</em><em>,</em><em>but </em><em>photosynthesis</em><em> </em><em>cannot</em><em>.</em><em>a</em><em>n</em><em>d</em><em> </em><em>photosynthesis</em><em> </em><em>doesn't</em><em> </em><em>take</em><em> </em><em>place </em><em>at </em><em>night</em><em>,</em><em>so </em><em>less </em><em>carbon dioxide</em><em> </em><em>is </em><em>used </em><em>up </em><em>than </em><em>it </em><em>is </em><em>produced</em><em>.</em>
<em>I </em><em>hope</em><em> this</em><em> helps</em>
Because the three-horned alien is heterozygous, we know that three must be dominant to four, because the gene for the three horns is "hiding" the gene for four horns. Therefore, the three-horned alien has the genotype Tt (T for three horns, and t for four horns). The four horned alien must be tt, because that is the only way that a recessive trait may be seen. If you solve the punnet square on a cross between Tt and tt, you end up with half three (heterozygous) and half four (homozygous recessive) it is a bit easier to explain with something a little "closer to home" if you want me to explain it again, just say so, I don't mind!
