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Arturiano [62]
3 years ago
7

A student conducted an investigation to study phototropism in grasses. The only difference between the control group and the exp

erimental group was light conditions. The control group was provided full light, while the experimental group was shaded on one side. The diagrams show the average heights and positions of blades of grass in the investigation. Which statement best explains why the grass tips of the experimental group bent toward the light?
a) Water evaporated faster on the side of the plant having full light.
b) Light sensors in the grass tips stimulated a hormone in the shoot system.
c) The xylem in the root system absorbed more nutrients from the shaded side.
d) The side facing the light has a greater chance of absorbing carbon dioxide from the atmosphere.
Biology
1 answer:
Maurinko [17]3 years ago
3 0

Answer:

Option-B

Explanation:

Phototropism refers to the movement of plants in response to light. The mechanism of phototropism involves the photoreceptors which respond to a different wavelength of light: the phytochromes to red light, cryptochromes to blue light and the phototropin to the UV light.

Plants integrate the signals obtained from these receptors and then activates the gene which will be involved in the phototropism.

The gene could be the production of the auxin hormone and the PIN proteins which helps in the distribution of the auxin in the plants. Due to the production of this hormone and its distribution in the shoot, the grass tips bend towards the light.

Thus, Option-A is correct.

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Answer: This is an opinion question so I will give you the facts so you can form your own opinion for this answer.

Explanation:

<u>PRO GMO:</u>

Manufacturers use genetic modification to give foods desirable traits. For example, they have designed two new varieties of apple that turn less brown when cut or bruised.

The reasoning usually involves making crops more resistant to diseases as they grow. Manufacturers also engineer produce to be more nutritious or tolerant of herbicides.

Crop protection is the main rationale behind this type of genetic modification. Plants that are more resistant to diseases spread by insects or viruses result in higher yields for farmers and a more attractive product.

Genetically modification can also increase nutritional value or enhance flavor.

All of these factors contribute to lower costs for the consumer. They can also ensure that more people have access to quality food.

<u>CONS of GMO</u>

Because genetically engineering foods is a relatively new practice, little is known about the long-term effects and safety.

There are many purported downsides, but the evidence varies, and the main health issues associated with GMO foods are hotly debated. Research is ongoing.

Some of the cons include: Allergies, Cancer, antibacterial resistance, and outcrossing which refers to the risk of genes from certain GMO plants mixing with those of conventional crops.

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3 years ago
Scientific question: Why does a dog circle its bed before lying down?
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