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Stella [2.4K]
3 years ago
10

Photosynthesis and carbon fixation can only occur in the presence of light. true or false

Biology
1 answer:
Lady bird [3.3K]3 years ago
6 0
False. The photosynthesis process has two stages, one in presence of light and the other without the presence of light (dark fase), in fact, the carbon fixation can occur during the dark fase, this process is call <span>Calvin cycle.</span>
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What would the amino acid sequence be for the following piece of RNA: AUG–CGC–AUU–GAC–CAA?
STatiana [176]

Answer:

This is what my teacher gave me to figure out the amino acid sequences. And it was confusing at first, but I eventually got it. So, hopefully it will help you too. Let me know if it helps. Or if it does not so that I can try to be more helpful.

Explanation:

This is a codon wheel/chart, whatever you want to call it. I attached the codon chart/wheel. So that you can see it. Let me know if you can not see it.

5 0
3 years ago
10 POINTS
Brrunno [24]

Answer:

450 kilocalories.

Explanation:

Since only 1/10th of the energy that an organism consumes is passed onto the next level of the pyramid, that would mean only 500/10 = 50 kilocalories are passed on, and the remaining 500 - 50 = 450 kilocalories are used up.

Hope this helped!

4 0
2 years ago
Read 2 more answers
A scientist makes the argument that she has found DNA evidence that shows that evolution does not exist. What would her evidence
quester [9]
If a scientist makes the argument that she has found DNA evidence that shows that evolution does not exist, the evidence would be the weak physical similarities among closely related organism and also among distantly related. 
6 0
2 years ago
Organelles are moved within the cytoplasm by being pulled along microtubules by the motor proteins __________ and __________.
11111nata11111 [884]
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5 0
3 years ago
Effects of pollution might includea. inability to see the top of skyscrapers because of the smog.b. acid rain-induced destructio
poizon [28]

Answer:

e. all of these answers

Explanation:

Air pollution in addition to affecting people, animals, plants and goods, causes other problems related to the changes that occur in its composition, such as: climate change, acid rain and the destruction of the ozone layer phenomena that affect the planet globally and that it is necessary to stop urgently by taking the necessary measures.

Main effects of pollution:

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- Effects on the environment :

It is in the natural environment where the first signs of the harmful effects of air pollution were seen, plants and vegetation act as an indicator in this regard.

Some of the most common contaminants :

SO2 ; O3 ; Fluorides ;  HCL; Cl2; NO2

- Effect on materials :

Contaminants can affect materials by particle deposition or abrasion and also by chemical reactions between the contaminant and the material. For example : stone, iron and paintings

- SMOG:

SMOG is known as fog-type pollution that occurs in some cities when the combination of certain factors occurs, depending on weather conditions and certain pollutants.

Some of them are:

Industrial smog

Photochemical smog

This phenomenon (SMOG) occurs when the mixture of nitrogen oxides and volatile hydrocarbons emitted by cars and industries and atmospheric oxygen react with solar radiation and form ozone.

- Acid deposition.

It is a regional effect. It results from the transformation of atmospheric pollutants such as sulfur dioxide (SO2) and nitrogen oxides (NOx) into secondary pollutants such as sulfuric acid (H2SO4), ammonium nitrate (NH4NO3) and nitric acid (HNO3).

Therefore, air pollution caused by SOx and NOx affects water, soil and ecosystems.

- Water contamination

Pollution of the waters of a sick river and kill fish, but not only these, but all forms of aquatic life .

Pesticides and other toxic chemicals that are used in the domestic environment, farms and industrial production, and that are dumped into the water, cause fish death.

3 0
3 years ago
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