Plants are green because they contain chlorophyll, which helps them with photosynthesis, the process of turning sunlight into food. Mushrooms are not green and they contain no chlorophyll; therefore, they cannot photosynthesize. ... That's why you often see mushrooms growing on dead tree stumps.
Answer:
Option A
Explanation:
Some of the prominent characteristics of site for a hydroelectric power plant are as follows –
A) Sufficient amount of flow
B) Good head or height
C) Site must be confined in order to reduce construction cost and it must have good access.
D) Must not be environmentally sensitive.
Considering the above point, it is clear that “flow” or speed of water is a prominent characteristic to determine the location of hydroelectric power plant. Keeping this in mind the most prominent site would be option A.
<em>Answer: </em>
<em>C.An enzyme’s active site is determined by the shape of the enzyme.
</em>
The substance that will help in seed germination and indicates to the plant that the stem must elongate to reach the light is <u>Auxin.</u>
The substance responsible for cell elongation is auxin. This phytohormone is formed in cells at the tip of the shoot and is then passed from cell to cell. As such, the hormone is shuttled through many cells of the plant before it reaches its final destination.
<h3>What is the role of auxin?</h3>
Even though many subsequent observations have supported this model, up to now there has been no definite proof that auxin is in fact involved in this process. Prof. Christian Fankhauser from UNIL (Université de Lausanne) in Switzerland explains why: "Up to now, all plants with a known defect in auxin transport showed a normal phototropism. How then could auxin transport be essential for this process?"
It was found that when several of the PIN and kinase components were missing, plant growth was completely unresponsive to the light signals that trigger phototropism. The auxin transport mechanism in these mutant plants was severely impaired: The plants grew upwards, away from the gravitational pull, irrespective of the light source. This helped the scientists prove for the first time that the hormone auxin definitely is the substance that drives phototropism.
Learn more about auxin
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Answer:
The answer is D. chemotaxis
Explanation:
A bacterial cell is in a solution with a chemical gradient. The bacterial cell directs its movements in order to move toward the highest concentration of glucose molecules within the solution. This is an example of positive chemotaxis
