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Ratling [72]
2 years ago
9

Above 38oC and below 0oC the rate of photosynthesis decreases. Propose a hypothesis to explain why this occurs.

Biology
2 answers:
elena-14-01-66 [18.8K]2 years ago
7 0

The right answer is A: Enzyme activity decreases at these temperatures

Temperature influences the activity of the enzymes responsible for assisting with chemical reactions in the Calvin cycle. When temperatures are low, enzyme activity is slow. As temperatures increase, the activity of the enzymes that assist in these chemical reactions also increases to a certain extent, which is the optimal response to temperature. It is at this point that the rate of photosynthesis of plants is the highest.

As the temperature continues to rise beyond this point, the enzyme activity decreases until photosynthesis stops. It is important to remember that the rate of photosynthesis in C3 plants is higher in cold conditions, whereas it is the opposite in C4 plants.

Whitepunk [10]2 years ago
6 0
C: Chlorophyll cannot absorb energy from the sun at these temperatures
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Answer:

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Explanation:

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5 0
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The diagram shows the bone structure of the front legs of two animals: a frog (amphibian) and an alligator (reptile). Shading is
velikii [3]

Answer:

The correct option is B) The homologous structures are evidence of descent with modification from a common ancestor.

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Homologous structures can be defined as similarities between organs or skeletal of organisms which suggest that they might have a common ancestor in the past. Homologous structures will have alike structures although they may be present in animals of different texa.

For example, The front legs of a frog, which is an amphibian is similar to alligator which is a reptile. This common structure show that they have homologous structures and hence might have had a common ancestor in the past.  

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