3. Not all cells have receptors for the molecule.
The main reason a signaling molecule is not receive by every cell nucleus is that not all cells have receptors for that particular molecule. Cells have specific receptors on their surface to recognize and respond to their corresponding signaling molecule. Cells that lack the specific receptors for a given signaling molecule will not respond to it, regardless of the size of the cell nuclei or other factors such as the stability of the molecule itself.
herbicide
insecticide
rodenticide
Answer: The correct answer is herbicide
Explanation: This answer has been confirmed correct.
Herbicides are designed to interfere with plant growth to stop the spread of undesirable plants or weeds.
Answer:
D):Cell membrane
Answer:
Answer is D. Water has high specific heat.
1 calorie/gram °C or 4.186 joule/gram °C is the specific heat of water, which is high as compared to any other common substance. The high specific heat of water due hydrogen bonds present between water molecules. In order to increase temperature of water, this bond needs to be broken down. To break many hydrogen bonds, a larger amount of energy is required. when all the bonds are broken water is changed from liquid to gas( water vapor).
Explanation:
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The movement of water in plants from the roots to the leaves is driven by transpiration, which creates a tension pulling water upwards. This process, as well as the water's cohesion and adhesion, and differences in water potential, is explained by the cohesion-tension theory.
The movement of water in plants, specifically from the roots to the leaves, is primarily driven by a process known as transpiration. Transpiration is the evaporation of water from the plant's leaf surfaces. This occurs at the leaf-atmosphere interface, creating a negative pressure or tension which effectively pulls up water from the roots, through the xylem vessels.
Adherence of water to the xylem cell walls, known as adhesion, and the attraction between water molecules themselves, known as cohesion, also play significant roles in this process. These factors permit the water to be held in the stem and leaf when transpiration stops at night as the stomata shut. Overall, this process of water movement is described by the cohesion-tension theory of sap ascent.
Water potential, at the same time, affects this process as it decreases from the roots to the top of the plant, meaning, there's a high water potential in the soil and roots and a low potential in the leaves, driving water upwards through the plant.
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