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3 years ago

Which best describes the role of auxin?

Biology

2 answers:

Sav [38]3 years ago

7 0

Answer: B

Explanation: i just did the test

Morgarella [4.7K]3 years ago

4 0

Answer:B. speeds up the growth of the plant on the shaded side

Explanation: plants have hormones.these hormones controls the activities of the plants by serving as specific chemical signals between cells. They are usually moved from where they are produced to the region of the plant where they act. Eg auxin, cytokinin, gibberellin etc

Auxin has the ability to cause enlongation in shoot cells and root . They cause the cells of plant to stretch. they are produced in the apical meristem,buds and leaves. They also causes the suppression of side buds.

When a plant is placed in a dark shade and a side is exposed to light, auxin gathers on the shaded part of the plant. This causes the cells in that area to enlongate and the plant bends towards the light.

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Kaylis [27]

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3 years ago

A_____is a group of the same kind o living things in an ecosystem.

rewona [7]

A population is a group of the same kind of living things in a ecosystem.

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3 years ago

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he viral capsid _______. Multiple Choice is dissolved engulfs the viral spikes surrounds the viral matrix protein becomes comple

Studentka2010 [4]

Answer:

Becomes completely enclosed by the region of the cell membrane into which the spikes and matrix protein are embedded

Explanation:

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3 years ago

An action potential causes the release of neurotransmitters by:________.

seraphim [82]

Answer:

b) opening calcium pores in the membrane

Explanation:

The opening of calcium ions channels facilitates the migration of vesicles containing neurotransmitters in the pre-synaptic neurons to the tip of the post-synaptic membrane. at the neuromuscular junction These neurotransmitters can either be cholinergic or non-chorlinergic. At the tip of the pre-synaptic membranes the vesicles empty their neurotransmitter contents into the synapse.

The neurotransmitters, diffuse through the neuromuscular junction to bind with the receptors on the post-synaptic membrane on the post-synaptic neuron. This stimulates opening of ligand gated sodium ions, and sodium ions diffuse into the post-synaptic neuronal membrane, to cause depolarization. if the stimulus is up to the threshold levels it generate action potential.

Therefore , more calcium ions channels opening produces; more diffusion of neurotransmitters;leading to opening of more sodium channels for depolarization; and IPSP or EPSP generation.

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3 years ago

Do you think it is possible to have the benefits of the agricultural & industrial revolution without the environmental costs

telo118 [61]

I do not think the industrial and agricultural revolutions could have occurred without the environmental costs. The industrial revolution in the 18th century occurred at a time in history when people where not aware of the consequences of their actions or the consequences of the widespread use of fossil fuels. Even if they were aware the technology would not have been present to harness power from natural renewable sources of energy.

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3 years ago