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1 year ago

All sources of pollution come from human activities. please select the best answer from the choices provided t f

Biology

1 answer:

padilas [110]1 year ago

4 0

False.

All sources of pollution do not come from human activities.

<h3>What are the causes of pollution?</h3>

There are some natural causes of pollution. When dangerous pollutants enter the air as gases, liquids, or solids, air pollution is formed. Although there are some natural processes that can produce air pollution, such as sulfur and chlorine gases from volcanic activity, smoke and ash from wildfires, dust storms, and biological degradation, manmade sources account for the majority of pollution in the atmosphere.

Burning fossil fuels for transportation, energy, and industry produces the majority of air pollution that is caused by humans. Carbon dioxide, nitrogen oxides, sulfur dioxide, volatile organic compounds (VOCs), and particulates are typical pollutants released by fossil fuel-burning engines. In addition to particles, carbon monoxide and carbon dioxide are produced by stoves, incinerators, and open burning.

Learn more about causes of pollution here:

brainly.com/question/8141448

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While studying the function of a G protein-coupled receptor you develop a modified GTP molecule that has the same binding capabi

laila [671]

<u>Answer:</u>

Effects Include:

Activates secondary messengers such as cAMP which further activates number of hormones like

ADH: production of this hormone causes kidneys to retain more water inside body.

GHRH: release growth factors and stimulates growth of organism.

ACTH: produces fight or flight responses i.e rise in heart beat, rise in Blood pressure etc

TSH: Stimulate the synthesis of Thyroid hormone and enhances the metabolism of body. In rare cases causes Goiter without the deficiency of Iodine.

LH: Stimulate follicle maturation and formation of ovules in women.

Calcitonin: Decreases blood calcium level by deposition calcium in bones. This effect weakens the muscles.

Glucagon: Stimulates glycogen breakdown from liver and muscles and many more effects.

<u>Explanation:</u>

Background Knowledge:

GPCR (G Protien coupled receptors) are present inside plasma membrane in huge amount. As name suggest that these receptors are coupled with G proteins during their inactive state present inside of the cell. During their Inactive state these G proteins are bounded with GDP molecule.

Upon receiving signal molecules from outside of cell alters the shape of GPCR. These receptors also triggers change in G Protein, as a result of this GTP get attached with them. This protein further activates reaction cascades inside of the cell.

What happen if GTP cannot be hydrolyzed to GDP + Pi?

If GTP cannot hydrolyzed in to GDP + Pi than, it cannot be able to dissociate from G proteins. Cascade system doesn't stop and produces many effects on body.

Effects Include:

Activates secondary messengers such as cAMP which further activates number of hormones like

ADH: production of this hormone causes kidneys to retain more water inside body.

GHRH: release growth factors and stimulates growth of organism.

ACTH: produces fight or flight responses i.e rise in heart beat, rise in Blood pressure etc

TSH: Stimulate the synthesis of Thyroid hormone and enhances the metabolism of body. In rare cases causes Goiter without the deficiency of Iodine.

LH: Stimulate follicle maturation and formation of ovules in women.

Calcitonin: Decreases blood calcium level by deposition calcium in bones. This effect weakens the muscles.

Glucagon: Stimulates glycogen breakdown from liver and muscles and many more effects.

7 0

3 years ago

HELP ME CMONN:) jsndjw

Keith_Richards [23]

Answer:

The third and the fourth option.

$3Mg+1Fe_2O_3 \\ = 3MgO + 2Fe[tex]3Mg+1Fe_2O_3 \\ = 3MgO + 2Fe \\$

$3Mg + 3Fe_2O_3= 3MgO+6Fepl$

Explanation:

The number of products and reactants are balanced

6 0

3 years ago

What beak shape do you think will be best for finding food in a period of abundant rainfall?

irina [24]

Answer:

Shorter beaks will be best for finding food in abundant rainfall.

3 0

2 years ago

Bobby touches his newborn brother's palm, and his little brother takes hold of Bobby's finger and will not let go. This is known

VARVARA [1.3K]

Answer: conditioned

Bobby touches his newborn brother's palm, and his little brother takes hold of Bobby's finger and will not let go. This is known as the conditioned reflex.

Explanation:

A conditioned reflex is a response or behaviour learned after birth. So, once the newborn acquires this learned response, they can perform them even without thinking about it.

Thus, Bobby's brother (the newborn) holding on to his finger and not letting go shows that it is a conditioned reflex

7 0

3 years ago

Whats the difference between transcription and translation.

amid [387]

Answer:

transcription is the process of listening to audio, video etc.,and writing into text form in the exact wording that the original speaker used whiles translation is the process of converting a text file from one language to another language

6 0

2 years ago