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Vilka [71]
3 years ago
14

What event occurs in photosystem 1?

Biology
1 answer:
Aleonysh [2.5K]3 years ago
8 0
Pigments in photosystem 1 use energy from light to reenergize the electrons.
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Species evolve useing what process
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Answer:

b

Explanation:

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Which neurotransmitter prepares the body for "fight or flight" and is seen in increased levels in patients with anxiety-related
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The neurotransmitter in the body which prepares it for "fight or flight" reaction is EPINEPHRINE. The level of Epinephrine is remarkably high in patients who have anxiety-related disorders. Also known as adrenalin or adrenaline, epinephrine is a hormone and at the same time a neurotransmitter; it is also used as medication.

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Please answer the following questions correctly​
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i.   Name each of the parts labelled I, II, III, IV and V.

                           {5 marks}

I - Crown / Enamel

II - Dentine

III - Cement / Periodontal membrane

IV - Jaw bone / Root

V - Pulp Cavity

ii   What is the function of each of the parts labelled I and III?

                    {2 marks}

I - Protects teeth from harmful bacteria

-- Enable teeth withstand pressure of chewing

-- Cutting / chewing / protects dentine / protect pulp cavity

III - hold tooth firmly (in socket / Jaw bone)

iii  Which of the labelled parts could be affected by tooth decay?

                                   {1 mark}

V - Pulp cavity

iv  State three ways by which tooth decay may be prevented.

                      {3 marks}

→ avoid using sharp-pointed objects

→ avoid having dry mouth

→ use water containing fluorides to wash teeth / mouth

→ avoid smoking

→ the teeth should be cleaned regularly after each meal / remove food particle from the teeth / flossing

→ wash the mouth vigorously after each meal

→ regular visit to the dentist

→ avoid eating too hot foods

→ avoid eating too much sugary food

→ avoid eating too cold food / taking too cold drinks

Explanation:

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99 POINTS Please help?!?! How can a chromosone regulate transcription and increase it?
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C the region that codes for rna folds 


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5 0
3 years ago
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this is an example of a positive acceleration because Paul is speeding up not slowing down

Explanation:

5 0
3 years ago
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