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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Answer: The correct answer is -
interphase and M phase.
Explanation:
Cell cycle can be described as a series of events that take place for the division of cell into two daughter cells.
It is primarily divided into two stages, which are-
1) Interphase (that is further divided into G1, S, and G2 phase) that involves the duplication of DNA and other proteins required in cell division.
2) M (mitotic phase) phase during which the nuclear division takes place through four successive stages that are prophase, followed by metaphase, anaphase and telophase.
After this cytokinesis (cytoplasmic division) occurs resulting in formation of two daughter cells.
Thus, first option is the right answer.
B. A substance in a solution that captures hydrogen ions and raises the pH
C. A substance in a solution that releases and captures hydrogen ions, keeping the pH the same
D. A substance in a solution that provides color over a narrow range of pH
The correct answer is:
B. A substance in a solution that captures hydrogen ions and raises the pH
Explanation:
Bases are substances that, in aqueous solution, release hydroxide (OH−) ions, are smooth to the touch, can taste bitter if an alkali,[1] change the color of indicators (e.g., turn red litmus paper blue), react with acids to form salts, increase particular chemical reactions (base catalysis), receive protons from any proton donor, and/or contain completely or partially displaceable OH− ions
Answer:
B
Explanation:
Ap3x
In order to increase the rate of photosynthesis in a plant, a plant should be developed with many broad leaves. The broad leaves will have increased surface area and more chlorophyll. The increased number of the leaves in the plant will also contribute to the overall increased rate of the photosynthesis.
A strong and thick stalk will support the plant but will have no effect on the rate of photosynthesis. Narrow leaves will decrease the photosynthesis rate. Bright flowers will aid in pollination via the honeybees but not increase the photosynthesis rate.
Hence, the correct answer is 'many broad leaves'.