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Galina-37 [17]
4 years ago
11

Complete digestive tract first observed in which phylum

Biology
1 answer:
sp2606 [1]4 years ago
3 0
In phylum annelida...
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A student conducts an experiment where he places a light source below a plant. Over a three week time period he observes the pla
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Answer:

This question lacks options, the options are:

A). Roots would grow up out of the pot and then down towards the light.

B). The plant stem would grow up and roots would grow down.

C). The plant would start to bend over and grow downwards toward the light.

D). The plant would wilt and die.

The answer is C

Explanation:

This question is describing an experiment conducted to test the effect of LIGHT on plants movement, a phenomenon called PHOTOTROPISM. Phototropism is the response of a plant towards a light source.

According to this experiment, a light source is placed below a plant and observed over a three-week time period. At the end of three weeks, the experimenter will observe that "the plant would start to bend over and grow downwards toward the light" because the plants strictly require light to photosynthesize and grow, hence, it will respond by moving in the direction of the available light source.

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List down four (4) possible reasons why percent yield is usually less than 100%?
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Answer:

Percent yield is the percent ratio of actual yield to the theoretical yield. It is calculated to be the experimental yield divided by theoretical yield multiplied by 100%. If the actual and theoretical yield ​are the same, the percent yield is 100%.

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4. Side reactions (unwanted reactions that compete with the desired reaction).

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