Maureen sprinkled some seeds on the ground in the woods near her home. A few weeks later, she returned to the place where she sprinkled the seeds. She noticed that some seeds germinated and some did not.
The seeds that had thick layers of branches and leaves overhead did not germinate. The seeds that were below clear areas of the forest did germinate.
Which condition is probably very important for the germination of these types of seeds?
A. oxygen
B. soil type
C. sunlight
D. food
A chemoelectrical signal that can travel along cell membranes in a wave-like pattern is a(n)?
A chemo electrical signal that can travel along cell membranes in a wave-like pattern is called a nerve impulse.
What is a nerve impulse?
A nerve impulse is an action potential generated across the plasma membrane of the neurons of our nervous system.The electrical potential difference generated across the neurilemma i,e., the plasma membrane of the neurons (due to the reception of the external stimulus), is responsible for the generation of the nerve impulse.Neurotransmitters, chemicals like acetylcholine, dopamine, etc., are also involved in transmitting nerve impulses across neurons.Hence, the chemoelectrical signal that can travel along cell membranes in a wave-like pattern is a nerve impulse.
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The two cells begin to divide into 4 non-identical haploid cells!
Which of these events happens during G2 phase in the cell cycle?
A. The cell's DNA is checked for errors in replication.
B. The cell grows in size by adding cytoplasm and cell organelles.
C. All of a cell's chromosomes are copied when DNA replicates.
D. The nucleus of a cell divides into two identical nuclei.
Answer:
it's B.
Explanation:
The cell is getting ready to split so it has to get big enough to split well.
Answer:all of a cell's chromosomes are copied when DNA replicates
Explanation:)
pls help i was going to help them but i don't fully understand
Homologous structures are the structures with similar anatomy, embryology, morphology, and genetics but dissimilar functions. Analogous structures are the structures that are similar but anatomical dissimilar doing the same function.
What is Cladogram?
A cladogram is a diagramic representation that shows relationships between species. This relationships is based on observable physical characteristics. As the below diagram representing the cladograph of table.
Species A is most primitive species in fossils records. Fossils are the or traces of remains, preserved remains, of ancient organisms.
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When a strong acid is added to a strong base a_________________ reaction occurs in the product will have a PH closer to_____
A. Neutralization,7
B. Ionic,0
C. Concentration,14
Answer:
A
Explanation:
Acids and bases when mixed neutralize eachother. and 7 is neutral on the PH scale
burning temperatures, such as those of a hot stovetop, are perceived by which component of a reflex arc? (2 points) effectors receptor dorsal root ventral root
Burning temperatures, such as those of a hot stovetop, are perceived by receptor component of a reflex arc. This is the option B
What is the reflex arc?It is common to see that when there is sudden pain or we touch something that is hot, we would instantly withdraw our hands from the source of the heat. Why do we do that? The reason why we feel heat is because of the nervous system.
The nervous system is composed of electrical receptors that can be found all around the body. These receptors are able pass on electrical signals from any part of the body to the brain and they help in the coordination of the affairs of the human body.
The way that the nervous system works is called the reflex arc of the system. It passes the information that it picks up directly to the brain for prompt action.
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The parts of an organism's environment that are living or once living, and interact with the organism are ?
Answer:
Biotic factor
Explanation:
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What force is needed to accelerate a 25 Kilogram
surface of 7 m/s2?
Sharks are the top predator in a marine ecosystem. By eating them, sharks maintain a balance in the population of smaller organisms. If the shark’s population were to decrease, the smaller organisms would increase greatly, interrupting the food web. Which of the following relationships is MOST similar to the relationship between the shark and the marine ecosystem?
Answer:
what are the options ??
Explanation:
identify each type of desert survival strategy used by plants (that does not directly involve water) from its description.
Succulence, drought tolerance, and drought avoidance are the three primary adaptation mechanisms
define succulents ?
Succulent plants, sometimes referred to as succulents in botany, are plants having thickened, fleshy, and engorged portions that typically serve to retain water in dry regions or soil conditions. The Latin word sucus, which means "liquid" or "sap," is where the term succulent first appeared.
Water may be stored by succulent plants in a variety of parts, including the leaves and stems. Some succulent organs, such those of Glottiphyllum semicylindricum and Mesembryanthemum barkleyii, can have water contents of up to 90–95% Since roots are often included in definitions, geophytes that endure adverse conditions by dying back to subterranean storage organs may be referred to as succulents. Succulents may also be found in alpine environments, although their natural habitats are typically in hot, dry climates with little to no rainfall, such as deserts.
Succulence, drought tolerance, and drought avoidance are the three primary adaptation mechanisms that desert plants have developed. These are all distinct but useful sets of adaptations for thriving in environments where plants from other places would perish. In their soft leaves, stems, or roots, succulent plants retain water.
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What significant function can parasitism have in the ecosystem?
a) the formation of lichens
b) benefiting the health of hosts
c) population decrease of an overabundant species
d) increasing habitat size
Answer:
Consider that parasites play an important role in regulating the populations of their hosts and the balance of the overall ecosystem. First, they kill off some organisms and make others vulnerable to predators. And there are millions of undiscovered parasite species, whose ecological niches we can only guess at.
Explanation:
Parasites also influence host behavior and fitness, and can regulate host population sizes, sometimes with profound effects on trophic interactions, food webs, competition, biodiversity and keystone species. These interactions suggest that parasites are integral components in shaping community- and ecosystem structure.
effect of agriculture on ecosystem
Answer:
Explanation:
I hope it helped
What do the different categories of hurricanes represent
Answer:
Category 1 - Winds 74 to 95 mph (minor damage)
Category 2 - Winds 96 to 110 mph (Extensive damage)
Category 3 - Winds 111 to 129 mph (Devastating)
Category 4 - Winds 130 to 156 mph (Catastrophic damage)
Answer:
I think its wind
Explanation:
because if you see the picture of a hurricane then you can see the wind being strong.
You work in a museum that has a huge, beautiful, stained-glass window. Each panel tints the light a different color. Recently a new exhibit showcasing plants from around the world has set up a table in front of the window. Plant 1 is in front of a blue stained glass, Plant 2 is in front of a purple stained glass, and Plant 3 is in front of a green stained glass. Which plant should you tell the museum director to move so it doesn’t become malnourished?
A. Plant 3
B. Plant 2
C. Plant 1
D. All three plants
Answer:
The plant that should be moved to not become malnourished is the plant 3.
Explanation:
The visible spectrum, or optical spectrum, is the portion of the electromagnetic spectrum whose radiation is composed of photons capable of sensitizing the human eye of a normal person. The corresponding range of visible light radiation is identified.
With that being said, plant 3 is in front of a green stained glass. plants have chlorophyll pigment that reflect back the green light, so the green light is least effective for photosynthesis and for that reason it will die as quickly as if it is kept in dark.
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What is the answer to 3(y+8)=2y-6
Answer:
y=-30
Explanation:
\(3(y+8)=2y-6\\3y+24=2y-6\\3y-2y=-24-6\\y=-30\)
Is it science -I’m 100 percent safe from lightning in my house
Answer:
Incorrect
Explanation:
Lighting is very powerful, just feeling the vibration may shock you.
Answer:
Incorrect
Explanation:
Which of the following chemicals is needed in order for cellular respiration to
occur?
A: carbon dioxide
B: chlorophyll
C: oxygen
D: water
Answer:
C
Explanation:
a mutation causes an increase in the production of the enzyme dna demethylase. this will most likely lead to methylation and a(n) in overall gene expression.
A mutation causes an increase in the production of the enzyme dna demethylase. this will most likely lead to methylation and decrease in overall gene expression.
A mutation in the gene that encodes the enzyme DNA demethylase can lead to an increase in the production of this enzyme. This in turn can lead to increased methylation of DNA, and ultimately to a change in gene expression. The precise effect of this mutation will depend on the specific gene involved and the extent of the increase in DNA demethylase activity.
In general, however, this mutation is likely to have a negative impact on gene expression and may lead to disease.The increased expression of genes may have beneficial or harmful effects, depending on the particular gene involved. For example, an increase in the expression of a gene involved in cell growth could lead to cancer.
A mutation that causes an increase in the production of the enzyme DNA demethylase will most likely lead to methylation and a decrease in overall gene expression. Methylation is a process by which a methyl group is added to a DNA molecule, usually by the addition of a methyl group to one of the DNA bases. This process can cause changes in the structure of the DNA molecule and can lead to gene silencing.
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What can you inter about the growth of the seed type pictured in the graphs below?
a. More seeds grow with more light.
b More seeds grow with less light.
C. The seeds grow faster with more light.
d Tinht has no effect on seed growth.
Answer:
The 2 graphs are pretty much showing the same effects on the dependent variable, so I would say that light has no effect on seed growth.
On the other hand, just by thinking logically, Seeds are usually underground before germination, so light wouldn't really affect them much.
So, light wouldn't really affect them
So d)
If the original cell
(parent cell) has 30
chromosomes, how
many chromosomes
will the new cells
have?
What is the adaptive significance of the seta of the sporophyte growing well above the mat of the gametophytes?
Answer:
Is the sporophyte more prominent in mosses or liverworts? Are mosses gametophyte or sporophyte dominant? What is the adaptive significance of the seta of the sporophyte growing well above the mat of the gametophyte ? Better dispersal of spores
Explanation:
What are the 4 steps of mitosis? What occurs during each?
Explanation:
There are four stages of mitosis: prophase, metaphase, anaphase and telophase.1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres 2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell) 3) Anaphase: sister chromatids are pulled to opposite poles of the cell 4) Telophase: nuclear envelope reforms, chromosomes unfold into chromatin, cytokinesis can begin The order of the stages of mitosis can be remembered using the mnemonic PMAT.
Earth is able to maintain relatively stable temperatures even with the large
amount of solar heat energy sent. (8 points)
A. What are four factors that contribute to Earth's stable temperatures? (4
points)
B. How does each factor affect Earth's temperature? (4 points)
A. The four factors that contribute to Earth's stable temperatures are:
The greenhouse effectThe carbon cycleThe water cycleThe albedo effectHow each of these factors affects Earth's temperature:The greenhouse effect: Earth's atmosphere contains gases like carbon dioxide and water vapor, which trap some of the heat energy from the sun and prevent it from escaping into space. This helps to keep Earth's temperatures within a relatively stable range.
The carbon cycle: Carbon is cycled between the atmosphere, oceans, land, and living organisms. This cycle helps to regulate the amount of carbon dioxide in the atmosphere, which is a key factor in the greenhouse effect. When carbon is absorbed by plants and other organisms, it reduces the amount of carbon dioxide in the atmosphere, which can help to regulate temperatures.
The water cycle: Water is constantly cycling between the atmosphere, oceans, and land. This helps to regulate Earth's temperatures by moving heat energy around the planet. For example, when water evaporates from the surface of the oceans, it takes heat energy with it, which helps to cool the oceans and transfer heat energy to the atmosphere.
The albedo effect: The amount of sunlight that is reflected back into space by Earth's surface can have a significant impact on temperatures. Bright surfaces, like snow and ice, reflect more sunlight than dark surfaces, like forests and oceans. When there is more snow and ice on the planet, it reflects more sunlight and helps to cool the planet.
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The air you EXHALE contains the products of which process? *
answer:
um
explanation:
the question literally makes no sense lol
why do the body's energy requirements decrease with age? because
The specific energy needs can vary among individuals based on factors such as body composition, activity level, and health status. So, energy requirements may decrease with age.
The body's energy requirements decrease with age due to several factors:
Metabolic rate decline: As individuals age, their metabolic rate tends to decrease. Metabolic rate refers to the energy expenditure required for bodily functions at rest. A decline in metabolic rate means the body requires fewer calories to sustain basic physiological processes.Loss of lean muscle mass: With aging, there is often a gradual loss of lean muscle mass, a condition known as sarcopenia. Muscle tissue is metabolically active and requires energy for maintenance. As muscle mass decreases, the overall energy needs of the body also decline.Decreased physical activity: Older adults may generally have a more sedentary lifestyle compared to younger individuals, resulting in reduced physical activity levels. Lower levels of physical activity translate to fewer calories being burned, further contributing to decreased energy requirements.Changes in hormone levels: Hormonal changes that occur with age, such as a decline in growth hormone and sex hormone levels, can affect metabolism and energy expenditure. These hormonal shifts can lead to decreased energy requirements.To know more about metabolic rate
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How many molecules of ATP are pro
duced by substrate-level phosphorylation from one turn of the Krebs cycle?
Answer:
1 mole of ATP per Krebs cycle
Explanation:
it's produced when
succinlycoa ---> succinate
( succinlycoa dehydrogenase)
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Smoking quickly impairs the respiratory system, including the ____ reflex, a vital protective response.
Smoking quickly impairs the respiratory system, including the cough reflex, a vital protective response.
Smoking has a detrimental impact on the respiratory system, particularly on the cough reflex, which is an essential protective response. The chemicals present in cigarette smoke irritate the airways and lead to inflammation and damage.
Over time, this constant exposure weakens and impairs the cough reflex. Normally, the cough reflex helps to clear the airways of foreign particles, mucus, and irritants, preventing them from reaching the lungs.
When the cough reflex is impaired, the ability to expel these substances is compromised, making smokers more susceptible to respiratory infections, chronic coughing, and other respiratory complications.
The impaired cough reflex also contributes to the accumulation of harmful substances in the lungs, further exacerbating the negative effects of smoking on respiratory health.
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3. How do you know this? (Quote some results to support your conclusion.)
Check all that occur during localized inflammation. Check All That Apply Chemical mediators cause vasodilation. Blood flow is decreased to the area. Vascular permeability is decreased. Fibrin walls of
Localized inflammation involves the response of the body to tissue injury. The signs and symptoms of localized inflammation include redness, swelling, heat, pain, and loss of function. Check all that occur during localized inflammation.
Chemical mediators cause vasodilation: The chemical mediators released from cells including histamine, prostaglandins, and leukotrienes, cause vasodilation, which leads to an increase in blood flow to the injured area.Blood flow is decreased to the area: Blood flow is not decreased to the area, but rather, it is increased due to vasodilation.
Vascular permeability is increased: The increased permeability of the blood vessels at the site of injury allows leukocytes and plasma proteins to move from the blood into the tissues. The result of the increased vascular permeability is the accumulation of fluid in the interstitial spaces.
Fibrin walls off the area: Fibrinogen is converted to fibrin, which forms a clot around the area of injury. The clot helps to prevent the spread of infection and protects the tissue during the healing process.
Therefore, Fibrin does not wall off the area but rather, it helps to protect the area from further damage.
So, the correct options are:Chemical mediators cause vasodilation.Vascular permeability is increased.
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