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slega [8]
3 years ago
9

Which activity is an example of a chemical change?

Biology
1 answer:
Pavlova-9 [17]3 years ago
4 0

Answer:

An old penny rusting

Explanation:

A penny forming rust is the penny being chemically altered and changing form as opposed to dissolving sugar in water, which is still sugar, just mixed with water. It doesn't change the chemical makeup of the water or sugar.

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Answer:

Agrobacterium contain the Ti plamisd which modifies the growth of plant tissue

Explanation:

Agrobacterium is a gram-negative bacteria which contain Ti plasmid which modifies the growth of plant tissue as a result from modifying DNA of plants by transference ( T-DNA) dysregulation cells division.  When plants are infected whit agrobacterium,  they presents alterations and dysregulation in the metabolism of their byologic regulators called phytoregulators and will start to synthesize opinas,  and all of the above triggers cell dysregulation and cells division resulting in the production of tumors.

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Above 380C and below OoC the rate of photosynthesis decreases. Propose a hypothesis to explain why this occurs.
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<u>Answer:</u>

<em>Enzyme activity decrease at these temperatures. </em>

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<em>At a temperature above 38°c and below  0°c enzyme activity decreases. </em>

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