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bazaltina [42]
3 years ago
6

What is the function of the stomata?

Biology
1 answer:
julia-pushkina [17]3 years ago
3 0

Answer:

The stomata controls the flow of gases in and out of the leaves.

Explanation:

The opening and closing of the stomata controls gas flow in leaves. This controls is necessary to prevent excessive loss of water as vapour from the plant body via transpiration. Usually stomata opens in the day and closes in the night. Each stoma or stomatal wall is flanked by two bean-shaped guard cells, the only epidermal cells with chloroplasts. The wall of the guard cells next to the pore are thicker than those adjacent to the epidermal cells. Here,,the thicker wall cannot stretch as much as the thinner walls.

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A medical student makes a transverse cut of a cadaver's leg. The two resulting sections could be referred to as the
Gelneren [198K]
A transverse section cut is a cross section took by slicing, really or through imaging techniques, the body or any part of the body structure, in a horizontal plane, a plane that crosses the longitudinal axis at a right angle. In other words, it divides the body into superior and inferior parts which is also known as the top and bottom parts.
8 0
4 years ago
: Cytotoxic T cells are rapid killers of infected target cells. Within minutes of the interaction of a cytotoxic T cell with a t
LiRa [457]

Cytotoxic T cells are rapid killers of infected target cells. Within minutes of the interaction of a cytotoxic T cell with a target cell, the program of apoptosis in the target cell is initiated. This rapid activity is a consequence of The extremely rapid production of granzymes and perforin by cytotoxic effector cells upon encountering a target cell.

  • A type of T cell known as a cytotoxic T cell (CD8+ T cell) is in charge of removing things that the immune system recognizes as dangerous.
  • Cytotoxic T cells are essential for controlling bacterial growth and illnesses in the body.
  • By instructing their targets to undergo apoptosis, cytotoxic T lymphocytes kill their prey.
  • Cytotoxic T cells can instruct antigen-specific target cells to die within 5 minutes of coming into contact with them when they are mixed with target cells and quickly brought into contact by centrifugation.
  • The speed with which cytotoxic T cells can induce apoptosis in their targets is due to the release of prepared effector molecules that trigger the target cell's own endogenous apoptotic pathway.

learn more about Cytotoxic T cells here: brainly.com/question/9292555

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8 0
2 years ago
Now consider a single base mutation in a codon for leucine that creates a codon for phenylalanine. A true reversion changes the
madam [21]

Answer:

options A, B, D and E

Explanation:

leucine codons include: UUA, UUG, CUU, CUC, CUA, CUG

phenylalanine codons include: UUU, UUC.

<u>C</u>UU          

replace C with U to give

UU<u>U</u> phenylalanine codon

replace underlined with A

UUA leucine codon

<u>C</u>UC

replace underlined with U

UU<u>C</u> phenylalanine codon

replace underlined with A or G

UUA, UUG  leucine codons

UU<u>G</u>

replace underlined with U

<u>U</u>UU phenylalanine codons

replace underlined with C

CUU leucine codon

UU<u>A</u>

replace underlined with U or C

<u>U</u>UU or <u>U</u>UC phenylalanine codons

replace U with C

CUU or CUC leucine codons

7 0
3 years ago
Mutualism is a long lasting, mutually beneficial interaction among organisms. Which of the following relationships best reflects
likoan [24]

Answer:

B .Reef corals build a hard protective skeleton that algae live in; the algae provide energy to the coral through photosynthesis

6 0
3 years ago
How does global warming affect the water cycle
Gennadij [26K]

Answer:

Climate change is likely hastening aspects of the water cycle as rising global temperatures raise the rate of evaporation globally. On average, higher evaporation leads to more precipitation. According to certain climate projections, coastal regions would get wetter while the center of continents will become drier.

Explanation:

There's many affects: three main ones are evaporation, precipitation, and surface runoff and stream flow.

You can see negative affects on Oceans, snowpack, clouds, and changes in water demand too.

Evaporation

Warmer air has the ability to store more moisture than chilly air. When a result, as the earth warms, the air will absorb more water from the seas, lakes, soil, and plants. The drier conditions left behind by this air might have a significant impact on drinking water supplies and agriculture.

On the other hand, the warmer, wetter air may imperil human life. Greater humidity, according to a research from Columbia University's Lamont-Doherty Earth Observatory, would make future higher temperatures unpleasant in certain regions by preventing the cooling benefits of our perspiration.

Precipitation

When all of that extra warm, more moist air cools, it pours more rain or snow on the earth. As a result, a warmer earth brings more rain and snowstorms. So far, the northeastern United States has seen the greatest rise in the severity and frequency of heavy precipitation events. Since 1979, thunderstorm groups in the Central United States have been more common and have dropped more precipitation.

Climate change will alter where precipitation falls by changing air temperatures and circulation patterns. Some regions, including the American West, Southwest, and Southeast, are anticipated to become drier. Meanwhile, the northern United States and the Midwest are forecast to receive more rain. These precipitation forecasts are already coming true.

According to the National Climate Assessment, the Southwest, southern Great Plains, and Southeast will see more intense and persistent droughts. And the majority of the rest of the country is also at danger of more severe short-term droughts. Researchers at the Earth Institute discovered that climate change may have already increased historical and current droughts, and that drier circumstances are exacerbating wildfires.

Changes in precipitation patterns will put many farmers, as well as natural ecosystems, in jeopardy. Columbia University's International Research Institute for Climate and Society scientists are developing tools and techniques to assist farmers in adapting to these difficulties. Natural ecosystems, on the other hand, may be unable to adapt as rapidly.

Surface Runoff and Stream Flow

Flooding can occur as a result of larger bursts of precipitation generated by warmer, wetter air, which can risk human lives, destroy houses, ruin crops, and harm the economy. Surface runoff — the water that pours over the ground after a storm — will also rise with heavier rainstorms. This rushing water may remove nutrients from the soil as well as sweep up pollutants, dirt, and other unwanteds, draining them into neighboring bodies of water. These toxins may contaminate our water sources and increase the cost of cleaning the water to meet drinking standards.

Furthermore, when runoff deposits sediments and other toxins into lakes and streams, it may endanger fish and other species. Fertilizer runoff may trigger algal blooms, which can suffocate aquatic species and create a nasty mess. The problem is exacerbated by warmer water, which can't store as much dissolved oxygen as fish require to thrive. These circumstances might impair fisheries and make it unpleasant for those who like fishing, swimming, and other recreational activities in lakes and streams.

6 0
3 years ago
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