Why do you think leaves have stomata on their underside only? Explain.

Answers

Answer 1
The stomata must be open during the daylight hours to let oxygen and carbon dioxide pass through. While they are open, water vapor escapes into the atmosphere (transpiration). ... Transpiration is the loss of water through stomata, so, more stomata are found on the lower surface to prevent excessive loss of water.

In a lotus plant, stomata is found on the upper epidermis of the leaf.

Stomata are responsible for the exchange of gas with the surrounding atmosphere of the leaf. Their guard cells stay taut during the day to keep the stoma open.

Guard cells can only stay open if they are saturated with a certain quantity of water.

From this information we can infer that stomata are typically found on the lower epidermis to prevent water damage when it rains.

The rain would not only cover the openings, it would also ruin the osmotic balance of the guard cells causing inefficiency and damage to the cycle of gaseous exchange.

Natural selection probably selected against such plants giving rise to those with stomata on the underside.

Related Questions

Helicobacter pylori survives in the stomach due to: a. a thick capsular layer b. endospore formation c. a teichoic acid receptor d. the production of urease to generate ammonia from urea

Answers

the answer is A, a thick capsular layer

Plants play a role in this cycle by completing photosynthesis:

Answers

Answer:Plants don't eat food; they have to create it for themselves. They do this through a process known as photosynthesis. Photosynthesis uses water, carbon dioxide from the air and energy from the sun or another light source to create glucose or sugar. This glucose provides the energy the plant needs in order to survive

Explanation:

Biodiversity describes the variety of ________ on our planet.

Answers

Answer:

life

Explanation:

Answer:

variety of life on earth

Explanation:

why is it important for plant's to store food?​

Answers

Answer:

Storing the food helps them to use it in winter and survive because there is very little sunlight available and so they photosynthesis less. ... When they have extra food they store it in their seeds and when the seed grows it gets it's food from the plant until the plant is able to photosynthesis and produce its food.

Answer:

It's important for plants to store food, as food is a source of nutrition, which is necessary for survival. Rather than just eating the food, storing it is a good way to ensure nutrients during droughts or other harsh conditions that make it hard to find food.

Explanation:

What is a type of light that both the sun and a light bulb emit?

Answers

Ultra violet (UV) Visible.

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How do you anticipate humans changing over time?

Answers

Answer:

the changes apparent in worldwide populations include a decrease in both overall body size and brain size as well as a reduction in jaw and tooth proportions.

Explanation:


The Sun is at the center of our solar system. Based on distance, how would the Sun's size appear to an observer on Jupiter, compared to an observer on Earth?

A) Bigger
B) the same size as seen on Earth
C) Smaller

Answers

I'm pretty sure it's C I think sorry if it's wrong

Answer:

C) smaller

Explanation:

the answer is c) smaller

what is a waning moon

Answers

Answer:

A period where a new moon will go to a full moon

Explanation:

The phase lasts from the Third Quarter Moon's semicircle until it disappears from view at New Moon. Waning means that it's shrinking and getting smaller, while crescent refers to the curved sickle shape.

The nervous system may be compared to a "

A computer
B trash removal company
C highways in a city
D water filtration center

Answers

Answer:

A. A computer

Explanation:

The way your nervous system works can be compared to how your computer works. When you press the power on your computer, a signal goes out. The signal is a catalyst that generates a number of actions and responses. An electric current travels over the wires maintaining a connection to electricity

The nervous system may be compared to a computer. So, the correct option is A.

What is Nervous system?

The nervous system is defined as a highly complex part of an animal that coordinates its functions and sensory information through the transmitting signals from different parts of its body. This system includes

1. The central nervous system consists of the brain and spinal cord)

2. The peripheral nervous system consists of the nerves that extend from the spinal cord to the rest of the body

3. Other nerve tissue.

The nervous system may be compared to a computer.  The way our nervous system works can be compared to the way your computer works. When we press power on computer a signal comes out like CNS and PNS work in the body

So, the correct option is A.

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A. El átomo de Thomson se caracteriza por ser esférico, con carga positiva, con electrones partículas alfa α partícula rebotada incrustados en él

Answers

Answer:

Debido a la presencia de partículas pesadas.

Explicación:

Debido a la presencia de carga positiva en el núcleo del átomo de Thomson, las partículas alfa α rebotaron cuando chocaron con el protón porque el protón es una partícula pesada y la presencia de neutrón la hace más pesada. Debido a la presencia de partículas pesadas en el núcleo, las partículas alfa no pueden atravesarlo. Solo puede pasar a través del átomo de Thomson donde hay un espacio vacío en el átomo.

Interferons Interferons reduce macrophage chemotaxis to the infection. interfere with viral replication. prevent viruses from entering a cell. bind to viruses and destroy them. prevent viruses from leaving a cell.

Answers

Answer:

interfere with viral replication

Explanation:

Interferons (IFNs) are proteinous molecules, which are part of the innate immune system of our body. Interferons are produced in response to viral infections and they often specialize in preventing the virus pathogen from replicating or multiplying in the host cell.

As their name implies, INTERFERONS interfere with the replication of viral pathogens, hence, preventing the virus from further invading the host cell. This is done at the innate immunity level.

Definition: This is an excessive amount of water that covers typically dry land.
Example: may be caused by high tides or tsunamis

Answers

Answer: A flood

A flood is an enormous amount of water. If the street is full of water, it's flooded. Too much of anything can also be called a flood.

Describe the connection between the digestive and circulatory systems (in detail)

Answers

Answer:

Explanation:(1) Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go. (2) Filters out waste from food and pushes it through intestines and out the body (and you know how and where it gets out).

Which high school courses would be beneficial for a career in parasitology? O anatomy and physiology botany and animal biology o technology and zoology biology and biochemistry​

Answers

I believe it's biology and biochemistry.

Label the ways that water and nutrients get into a plant


PLEASE HELP

Answers

Answer:

mediante la absorción, por la raíz

Explanation:

After a copper smelter begins operation, local downwind populations of plants begin to adapt to the resulting air pollution. Scientists document, for example, that the acid tolerance of several plant species has increased significantly in the polluted area. This is an example of

Answers

Answer:

Adaptation.

Explanation:

Adaptation occurs when the acid tolerance of several plant species has increased significantly in the polluted area. The main reason for this tolerance is the change in the genetic makeup or mutation occurs in the cell due to the exposure of DNA to the chemicals of the environment that cause pollution. The plant adopt the environment by producing certain chemicals that cancel the effects of pollutants and as a result, the plant survive.

Cells with a full set of chromosomes are referred to as diploid or 2n, whereas cells with half the chromosomes are haploid or n. At which stage(s) of meiosis I are the cells diploid and at which stage(s) are they haploid

Answers

Answer:

Diploid → Prophase, metaphase, and anaphaseHaploid → Telophase

Explanation:

During prophase I,  chromosomes get condensed. Each of the chromosomes gets in pair with its homologous one. They do so to make the crossing-over possible, a stage where they interchange their parts → 2n

During metaphase I, each of the homologous pairs is driven to the equatorial plane, where they randomly line up → 2n

During anaphase I, occurs the independent separation of homologous chromosomes that migrate to opposite poles of the cell. This separation generates different chromosomal combinations in the daughter cells. There are two alternatives per homologous pair → 2n  

In telophase I, half of the chromosomes are already in one of the poles, while the other half is on the other pole. Each group of chromosomes has now half the number of the original cell. The nuclear membrane forms again in each pole → n

Finally, occurs cytokinesis, which involves the invagination of the cell membrane and cytoplasmic division.

The two new cells are ready for meiosis II.

Mitosis and Meiosis are the two types of cell division, in which the genetic material is replicated and transferred to the daughter cells.

The stages of meiosis in which chromosomes are diploid are prophase, metaphase, and anaphase. The haploid chromosomes are observed in telophase.

Meiosis is a reduction division in which genetic material is halved, such that a reduction in which diploid parent cells give rise to haploid daughter cells.

The stages of meiosis at which chromosomes are diploid and haploid are:

1. Prophase I is the first phase of meiosis I. The chromosomes are condensed and pair with the homologous chromosomes.

2. Metaphase I is characterized by the homologous pairs aligning at the equatorial plane.

3. Anaphase I is the independent separation of chromosomes, which migrate to opposite poles.

4. Telophase I is represented by the separation of chromosomes having a haploid number of chromosomes, which are now segregated into daughter cells.

Therefore, telophase I am the phase in which chromosomes are present in haploid numbers.

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What height in meters must the student climb in order to reach the top of the hill?

Answers

Answer:

253 m

Explanation:

The height in meters must the student climb in order to reach the top of the hill is 253 meters. The correct option is B.

What is the height?

Height is a measurement of vertical distance, or vertical extent (how “tall” something or someone is) (how “high” a point is).

Climbing is the activity of ascending a steep topographical object with one's hands, feet, or any other part of the body, which can range from the world's tallest mountains (e.g., the eight-thousanders) to little stones.

The image of a mountain is given which is climbed by a person. There are different heights of the mountain is given. The height that is a must-climb by the student to reach at the top is 253 meters.

Therefore, the correct option is B. 253 m is the height of the mountain to reach the top.

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The question is incomplete. Your most probably complete question is given below:

245 m

253 m

236 m

260 m

y Sem 2
L 4.5.2 Test (CST): Computer-Scored Unit Test
Question 14 of 25
Why did DNA technology lead to more use of cladistics?
A. It showed that the Linnaean system was very accurate.
O B. It showed that most traits result from genetic drift.
O C. It showed that different looking animals are actually related.
OD. It showed that gene flow happens between populations.
SUBMIT

Answers

Answer:

The correct answer is - C. It showed that different-looking animals are actually related.

Explanation:

DNA technologies help in developing the lineage of the organisms and more use of cladistics. DNA techniques help in determining which animals were closely related by studying the genetic change.

It is used to established new evolutionary relationships between different-looking animals as minor genetic changes may lead to morphological changes.

A hybrid offspring of a male lion and a tigress is a _________.
Plz answer I will add you as brainlest

Answers

Answer:

Such offspring are called hybrid offspring. Furthermore; within such hybridization process, if male is a lion and female is a tiger (tigress) then the hybrid offspring is termed as a liger. Vice-versa; if the male is a tiger and the female is a lion (lioness) then the hybrid offspring is called a tigon.

Answer:

Liger

Explanation:

PLZ HELP!!!!!!!!!!!!!!!!!!!
What are the vertebrae right under the skull referred to as?

lumbar vertebrae

cervical vertebrae

sacrum

thoracic vertebrae

Answers

Answer:

thoracic vertebrae

Explanation:

I hope I'm right

Climate change has begun to affect insects as food resources have started disappearing . The monarch butterfly and the queen butterfly have to compete for the same food source . This is an example of____competition.
A. Co-species
B. Intraspecies
C. Interspecies
D. Habitat

Answers

Answer:

B.

Explanation:

In an ecological environment living things of different or same species compete with each other for the limited resources available. It is a symbiotic interaction between these living things.

There are two types of competition between these living beings- intraspecific and interspecific. In the given scenario, it is an intraspecific competition between the monarch butterfly and the queen butterfly.

Intraspecific competition is a competition between two living beings of the same species.

The monarch butterfly and the queen butterfly both belong to the same species- danaus.

Therefore, option B is correct.

HLEP PLZ!
What is the main cause of the destruction of Earth's ecosystems?
meteor strikes
landscape alteration
global warming
invasive species

Answers

landscape alterations like cutting down trees

Answer:

the answer is pollution hope it helps

What is the purpose of mitosis?

Answers

Answer:

Mitosis creates more diploid cells by copying each chromosome and moves it to the other side of the cell.

Explanation:

This lets the cell get divided straight down the middle.

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Some antibiotics destroy disease causing bacteria by entering the bacterial cells and
interfering with the critical life processes that keep them alive. However, antibiotics
are not able to destroy viral infections because

Answers

Answer:

B

Explanation:

Viruses don't have cell walls that can be attacked by antibiotics; instead they are surrounded by a protective protein coat. Unlike bacteria, which attack your body's cells from the outside, viruses actually move into, live in and make copies of themselves in your body's cells.

helpppp omg gdkdnfjf

Answers

Answer:

there is no question. we have nothing to work with besides a graph and a cut-off sentence.

Explanation:

no question sorry :(

Physics

Solve this
And also tell what is 1dm3​

Answers

Explanation:

1 dm3 is a cube with dimension 1 deci meter

One cubic decimeter is the unit of volume which is exactly equal to one litre.

What is meant by volume ?

Volume of an object is defined as the amount of space within the object which the matter can be occupied.

Here,

It is said that volume is a derived quantity.

Volume is said to be a derived quantity because, volume is the product of length, breadth and height of a three-dimensional shape.

It is given that,

1 L = 1000 mL

1 L = 1 dm³

1L = (10cm)³ = 1000 cm³

We know that, 1 cm = 10⁻²m

So, we can write that,

1L = 1000 x (10⁻²m)³

1L = 10³ x 10⁻⁶m³

Therefore,

1L = 10⁻³ m³

Or

1 m³ = 1000 L

1 dm³ or 1 cubic decimeter is the unit of volume, which is equal to one litre.

Hence,

One cubic decimeter is the unit of volume which is exactly equal to one litre.

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Each level of the energy pyramid is called a trophic level. How does the amount of energy available to organisms differ at each trophic level in a food chain?​

Answers

Answer:

Most of the food energy that enters a trophic level is "lost" as heat when it is used by organisms to power the normal activities of life. Thus, the higher the trophic level on the pyramid, the lower the amount of available energy

Which of these is the energy-carrying particle that
enables muscle contraction?
ОАТР
O water
O oxygen
O sarcolemma

Answers

C: oxygen

Step by step:

Let me get Brainly:)
The answer is oxygen I’m pretty sure

Which is a sustainable practice?

Answers

Answer:

         Economical practices are the cycles administrations utilize to keep up the characteristics that are esteemed in the actual climate. Living reasonably is tied in with living inside the methods for characteristic frameworks (climate) and guaranteeing that our way of life doesn't hurt others (society and culture).

Explanation:

Sustainable practices are the processes services employ to maintain the qualities that are valued in the physical environment. Living sustainably is about living within the means of natural systems (environment) and ensuring that our lifestyle doesn't harm other people (society and culture).
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