quizlwt Select all that are true regarding gas exchange in a vascular plant. Guard cells regulate whether stomata are open or closed based on availability of water in the plant. Guard cells regulate whether stomata are open or closed based on availability of water in the plant. When stomata are closed, the plant is not able to exchange oxygen and carbon dioxide gas with the atmosphere. When stomata are closed, the plant is not able to exchange oxygen and carbon dioxide gas with the atmosphere. Stomata are open when a plant is low on water, and closed when a plant has plenty of water. Stomata are open when a plant is low on water, and closed when a plant has plenty of water. Plants close their stomata to reduce water loss. Plants close their stomata to reduce water loss. Guard cells regulate whether stomata are open or closed based on availability of sugars in the plant. Guard cells regulate whether stomata are open or closed based on availability of sugars in the plant. Transpiration is loss of water vapor from leaves. Transpiration is loss of water vapor from leaves. Skip to navigation

Answer:

Explanation:

The gas exchange of plants is part of the cellular respiration process, where the plants both remove and release gases into the atmosphere. This exchange happens through structures present in the leaves of plants, which are called stomata. Stomata function as doors, if they are closed it is impossible for the plant to promote gas exchange, but if they are open. Transpiration occurs with the release of water vapor through open stomata. It is in this water vapor that the plant releases oxygen into the atmosphere.

The opening and closing of the stoma is a highly regulated process, because opening the stoma makes the plant lose water. In this case, the guard cells are responsible for opening and closing the stoma whenever necessary and the plant has good water levels.

Sedimentation and erosion lead to what characteristic of streams?

A]meandering
B]channeling
C]reduced flow
D]increased salinity

Una persona sana necesita 1500 cal diarias para mantener su peso y su actividad rítmica normal ¿Cuántos J se obtendrá en 18,5 horas?

in which does light travel fastest

transforms one strand of nucleic acid into two sets so that each set may be passed on to daughter cells in cell division​

a point mutation changes the DNA sequence CGA to CGT but the same protein is still produced. which point mutation occurred

标题:
Arrange their 3 homologous pairs into Metaphase 1 (this will represent tetrads)
3. How many chromatids do you have?
RUBE

In what ways can ecosystems be analyzed by the levels of organization within them?

5. How is density affected when the depth increases?

An ecosystem experiences a ten year drought. As a result of the
drought, many plant and animal species are not able to survive.
What will be the effect on the biodiversity and sustainability of the
ecosystem?
A. Increased biodiversity and increased sustainability
B. Decreased biodiversity and increased sustainability
C. Increased biodiversity and decreased sustainability
D. Decreased biodiversity and

decreased sustainability

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where in the fossil record would you expect to see older common ancestors
How would gradualism persent in the fossil record

Write 3 sentences about what you learned yesterday about phases of the moon.

List and describe the characteristic and position on the periodic table of halogens.

Long tail X short tail + all long.

Mate two of these long tailed mice together and you get 3/4 long, 1/4 short.


C. Incomplete dominance




E. Dihybrid cross


A. Dominant/recessive gene


B. Codominance


D. Lethal gene

Why is the structure of a
nucleosome so important?

How is energy and forces related

The atmosphere: protects the earth from harmful radiation is made mostly of nitrogen traps heat from the sun can be used to transmit radio signals is important in the water cycle

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Which of the following is NOT an example of natural selection?

A. Plants with thorns are less likely to be eaten by herbivores than other members of the same species that lack thorns.

B. Bacterial populations in hospitals develop resistance to drugs used to combat infection by them.

C. Scientists breed cows that give greater amounts of milk than their ancestors.

D. Fruit fly larvae with an enzyme to break down alcohol are better able to feed on fermenting fruit than those that lack the enzyme.

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Which statement describes the relationship between bond strength and the
melting and boiling points of a substance?
A. As the force between the particles increases, the melting and
boiling points also increase.
B. As the force between the particles increases, the melting point
increases and the boiling point decreases.
C. As the force between the particies increases, the melting point
decreases and the boiling point increases
D. As the force between the particles increases, the melting and
boiling points decrease.

Which of the following is possible genotype for the offspring?

1. Animals are _____ and hence they depend on other organisms (plants and other

animals) for their food.​

The image below represents a satellite view. What type of land features are pictured in this image?




Canyons

Hills

Volcanoes

Ocean

Read the excerpt from How Hurricanes Form.

Hurricanes are often compared to engines. Just like engines, they need a type of fuel. Hurricanes form over warm ocean waters near the equator. For hurricanes, their fuel is warm, moist air. When hurricanes form, the warm, moist air above the ocean rises upward from close to the surface of the water. Because the warm air rises, it results in less air under the surface of the water. This area with less air is known as an area with low pressure.

Air from areas surrounding this low pressure space pushes in to the area. This fills the low pressure area. The new air in this space becomes warm and moist and also rises. As the air continues to rise, the air surrounding the space swirls in to take its place. This process of air swirling in to replace air that has risen continues. Eventually, the moisture in the air forms clouds.

The wind and the clouds that form create a system. A system is a pattern of weather. The system of clouds and winds continues to spin and grow. The water evaporating from the ocean's warm surface acts as the fuel, which is what helps this spinning and growing. The system rotates faster and faster until the eye of the storm forms in the center area. Ironically, the eye of the storm is the calmest part, and it has very low air pressure. The higher pressure above the hurricane continually flows down into the eye.

Select the detail from the excerpt that supports the main idea of this part of the article. (2 points)

a
Hurricanes are often compared to engines.

b
The eye of the storm is the calmest part of the storm and has very low air pressure.

c
The water evaporating from the ocean's warm surface acts as the fuel.

d
This process of air swirling in to replace air that has risen continues.

A science class is doing an experiment on how light affects the growth of plants. One set of plants is placed under a special light, a second set
of plants is placed in the dark. A third set of plants is left under normal room lights. The class measures and charts each plant's growth for a
week.
In this experiment, the third set of plants that was placed under normal room lights would be identified as the

A watershed, also known as a drainage basin, is an area of land where water drains to a central point like a lake river or an ocean. natural vegetation in the landscape, helps maintain the natural flow of Regine of water and rapid change in water level in lakes and wetlands. imagine a position of a wetland that has changed as scenes in the image. predict what will happen to the natural flow of water is natural vegetation as replaced by impervious surfaces

A) groundwater flows increase to its endpoint causing flooding

B) runoff will increase and less water will penetrate the soil to become groundwater

C) groundwater will puddle up and remain in one place instead of flowing to a central point

D) impervious surfaces such as roads and parking lots will divert water flow and it will not reach its endpoint
​

In a forest more grass grew as a result of more rain. How will grass affect the deer that live in the forest?

Normal red blood cells slide easily through narrow blood vessels. In sickle cell disease, many red blood cells change to a crescent shape like a slender moon. Crescent-shaped blood cells cause blockages in blood vessels. These blockages decrease the transport of oxygen. People with sickle cell disease often have sharp pains due to the lack of oxygen in parts of the body. The sickle cell version of the gene that causes sickle cell disease is recessive. Suppose that two parents with no symptoms have a child with sickle cell disease. What genes did the child inherit from the parents?