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faltersainse [42]
3 years ago
13

One living plant leaf, still attached to the plant, is placed into a cup and covered with water. A light source is placed above

the cup shining into the cub of water so that the leaf receives the light. In moments, bubbles appear at the surface of the plant leaf.
Group of answer choices:

photosynthesis is occuring and bubbles of oxygen gas are being released by the leaf into the surrounding area

photosynthesis is occuring and bubbles of carbon dioxide released by the surrounding area and absorbed into the leaf

photosynthesis is occuring and bubbles of carbon dioxide gas being released by the leaf into the surrounding area

photosynthesis is occuring and bubbles of air are entering the water from the area around the plant

Biology
2 answers:
Afina-wow [57]3 years ago
8 0

Answer:

photosynthesis is occuring and bubbles of carbon dioxide gas being released by the leaf into the surrounding area

Explanation:

Charra [1.4K]3 years ago
7 0

Answer:

photosynthesis is occuring and bubbles of carbon dioxide gas being released by the leaf into the surrounding area

Explanation:

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Parkinson disease is associated with demyelination of CNS neurons. a pyramidal nerve tract lesion. insufficient production of ac
Pepsi [2]

Answer:

The correct option is: <em>a deficiency of dopamine in the substantia nigra.</em>

Explanation:

The substantia nigra is the principal site involved in the physiopathology of Parkinson´s disease.

Cells from this area degenerate and die progressively causing important degeneration in the central nervous system. The cells that die -with no known reason- are those that produce dopamine and proportionate dopaminergic innervation to the encephalon. In fact, almost all the symptoms exhibited by patients with the disease can be explained by the lack of dopamine in the substantia nigra.  

This area uses the neurotransmitter to communicate neurons from the base ganglia. Ganglia are responsible of modulating and modifying movements.

The nigrostriatal system participates in planning and automatic execution of learned movements. When the ganglia activity decreases, so it does the amount and velocity of movements, something typical of the disease.  

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2 years ago
Which of these is a way to increase the availability of freshwater
Nastasia [14]

Answer:

Option A

Explanation:

Options -

A-avoid water pollution.

B-build thermal power plants.

C-add water features to gardens.

D-avoid drip irrigation systems

Solution -

The largest source of freshwater on planet earth is underground water. The water beneath the surface of earth is very limited. The total fresh water reserve on earth is 3% of the total water on earth. Pollution due to discharge of waste water into the rivers and oceans has caused the degradation of not only surface water but also ground water.  

Thus, option A is correct

Drip irrigation is a means to prevent wastage of water during irrigation. Thus, avoiding it will cause further loss of fresh water.  

Addition of water feature will increase usage of water, thus it is also incorrect

Building thermal plant will also cause water pollution and wastage. Hence, option  B is also incorrect

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<h2><u>Answer</u> :</h2>

The correct option is A. If a dominant allele is present, the recessive allele won’t be seen.

The dominant allele is the one which appear, and the recessive one isn't shown.

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