Answer:
The xylem vessels and the phloem sieve tubes are connected end to end to transport the water and the food respectively to long distances in a plant. Their end plates are perforated to allow the easy passage of substances from one vessel and the sieve tubes.
Answer:
Sieve tube cells are placed end to end in phloem The end walls may be transverse or oblique They have many small pores called sieve pits Each sieve pit is lined by a layer of callose Excessive growth of callose closes the sieve pores Due to the presence of sieve pits the end walls are commonly called sieve plates
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What cell parts are common to all of these cells?
Use complete sentences.
Answer:
between an animal cell and a plant cell there are some parts that are similar and carry out the same function like:
both have a cell membrane which selects what goes in the cell.
both have cytoplasm which holds the protoplasm(the living part of the cell)
both have a nucleus which carries out all cell activities and holds threads of DNA called chromosomes
both have a mitochondria which is the power house of the cell
both have golgi bodies which modify and carry proteins from sites of synthesis to sites of reaction
I hope this helps
(Physical Science)
A ball and stick model of a molecule of formaldehyde, CH2O, is made from the following components:
-one black ball
-one red ball
-two white balls
-three sticks
What do the sticks represent?
A. oxygen atoms
B. hydrogen atoms
C. carbon atoms
D. bonds between atoms
Answer:
option D is the correct answer
Answer:
D
Explanation:
¿De qué forma se puede aprovechar los fenómenos naturales para solucionar los problemas de alimentación?
Which organisms feed on host organisms, causing them harm
A. herbivores
B. parasites
C.carnivores
D.omnivores
I WILL GIVE BRAINLIEST
state when this reaction occurs
Answer:
When blood clotting is activated, fibrinogen circulating in the blood is converted to fibrin, which in turn helps to form a stable blood clot at the site of vascular disruption.
I hope this answer helps you out. If you have any questions let me know. Have a good day :).
Explain why gravity matches the criteria for science and not pseudoscience
Answer:
Explanation:
Gravity is based on reliable scientific experiments, while pseudoscience cannot be proven by experiments.
In response to injury, cell fragments called platelets get activated to induce clotting. Activated platelets release factors that can in turn bind to specific membrane receptors on nearby cells. What type of signaling would this be considered
Answer:
Activated platelets express negative phospholipids on the exterior leaflet of their cell membrane, release vasoactive compounds, release cytokines, and release growth factors.
When an injury causes a blood vessel wall to break, platelets are activated. They change shape from round to spiny, stick to the broken vessel wall and each other, and begin to plug the break. They also interact with other blood proteins to form fibrin.
Platelets contribute their hemostatic capacity via adhesion, activation and aggregation, which are triggered upon tissue injury.
Explanation:
Proteins are one of the four main
types of
biomolecules
O living
O complex
Why must an mRNA copy be made for Protein Synthesis?
A. Ribosomes cannot read DNA, only RNA.
B. DNA is too degenerate to use without mRNA.
C. DNA must stay inside the nucleus.
D. Ribosomes are too big to enter the nucleus.
a person blinks his eye.why?How is this kind of response different from salivation at sight of delicious food.
Answer:
i dont know
Explanation:
Which answer below is in correct order from smallest (-) to largest (+)
Answer:
the 2nd answer
Explanation:
Is milk production a quantitative trait? explain your answer
can someone plz help me
what is enzymes?? give two examples
How does deforestation contribute to climate change?
O A. Fewer trees are available to fossilize into petroleum.
O B. Fewer trees are available to absorb greenhouse gases.
C. Tree loss reduces the land's albedo.
O D. Tree loss increases the effect of volcanic eruptions.
help is appreciated!!!
Answer:
d secondary consumer
Explanation:
Because it eats what eats the plant
Answer:
secondary consumer
Explanation:
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You are building a birdhouse when you cut your finger. Predict which body systems would be immediately involved with your reaction to the cut.
I think it is the immune system I'm not sure
Can someone please help me with this I would really appreciate the help.
hopefully this helps! check it out
What are the homeostatic pressures an axolotl goes through and how do
they deal with that?
describe the human population growth curve over the past 10,000 years, and identify the type of population growth curve it represents
p.s I will give brainless
Explanation:
Global human population growth is around 75 million annually, or 1.1% per year. The global population has grown from 1 billion in 1800 to 7 billion in 2012.
Although the direst consequences of human population growth have not yet been realized, exponential growth cannot continue indefinitely.
In the late 1970s, China’s “one-child” policy tried to control population growth, but restrictions were relaxed in the early 2000s.
5-7 sentences that describe the life cycle of a star
Answer:
The accurate existence of a star depends extremely on its size.
Explanation:
The mass decides the life cycle of a star whereas the central sequence star shines, hydrogen in its core is turned into helium by nuclear fusion. Meanwhile, the hydrogen supply in the core begins to run out, and the star is no longer producing heat by nuclear fusion, the core enhances unstable and contracts.The stars are grown in clouds of vapor and dust which are identified as Nebulae. The nuclear reactions toward the center of stars produce sufficient energy to get them to shine brightly for several years. Sun is the nearest star to the earth. Numerous stars are visible to the bared eye from Earth through the night, resembling twinkling dots due to their enormous distance from the Earth.Learn more about life cycle of star, refer:
https://brainly.com/question/6359930https://brainly.com/question/2053645who had discovered cell and in which year
Answer:
Robert Hooke discovered cell in 1665.
Jermone is performing an experiment for the science fair
Answer:
whats the question
Explanation:
bacteria are advantageous as well as disadvantageous. why
Answer:
ADVANTAGES:
Bacteria are involved in production of many food products such as yogurt, cheese, pickles, etc.
Bacteria break down waste material so that our environment is not permanently cluttered with garbage, dead bodies, etc.
Bacteria are responsible for the production of important essential compounds that are necessary for life such as vitamin K production by E. coli in the gut
DISADVANTAGES:
Some bacteria cause infections or produce toxic substances that are a threat to life and/or health.
Bacteria cause spoiling of food so that it does not keep as long as we may desire.
Some bacteria may cause infections of plants, threatening our food supply or ornamental plant.
Thoroughbreds are an example of a type of horse that results from selective breeding. However, not all thoroughbreds have the traits that are most desired. How is it possible to breed thoroughbreds but not have a horse with desired traits such as a fast runner?
In selective breeding, when crossing individuals that express the desired phenotype but are heter0zygous for this character, their offspring might express the undesired trait.
--------------------------------------
The main goal of selective breeding is to get individuals -plants or animals- with the desired traits. These traits make them better, according to the breeder's interest. The interest is to produce individuals with the same reproductive capability, adaptability, capacity, and general phenotype as the original pure line.
To get a generation of individuals expressing the desired traits, the breeder must select parents that have the characteristics of interest. Many or some animals of the progeny might inherit the desirable phenotype.
In general, pure and almost identical animals with the desired traits are produced after many generations of inbreeding. These are the pure-bred individuals and are the product of many selective crosses.
Pure-bred (true-bred) animals are h0m0zyg0us dominant or recessive for the desirable traits. The progeny of the same line express similar phenotype and performance to the ones of their progenitors.
Many problems are associated with selective breeding and the production of pure lines.
In the exposed example, let us say that the desired trait is running speed and that there is only one autosomal gene that codes for run speed.
the dominant allele F expresses the trait fast runnerthe recessive allele f does not express the trait fast runnerSo, FF and Ff individuals will be able to run fast, while ff individuals will not.
Probably the breeder does not know the genotype of the animals, so this person crosses the horses according to how fast they run -phenotype-. If the breeder wants to get fast runner animals, he/she will only choose horses with this trait, which might be either FF or Ff.
If the breeder chooses two heter0zyg0us individuals, there are 75% of getting horses with the desired trait and 25% of chances to get horses with the undesired trait -h0m0zyg0us recessive genotype ff-.
The breeder needs many generations of inbreeding to get only horses that are fast runners.
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5. What kind of heterotrophs are humans? Justify
Answer:
Chemoheterotrophs
Explanation:
we get energy from chemicals that they acquire by eating other forms of life exclusively.
The variable in a scientific experiment that is manipulated by
the researcher to investigate its effect on another variable
called the dependent variable is known as the
i found this. it's says the independent variable
Can anyone help
Me if y’all know this?
Answer:
62 dg = 0.62 dag
72,448 mm = 72.448 m
0.641 L = 641 mL
10,000 cm = 0.1 km
0.998 dL = 0.0998 daL
78,548 m = 78,548,000 mm
45 hg = 4500000 mg
97,123,582 mm = 97.123582 km
0.00741 kL = 7,410 mL
745 g = 74,500 cg
25 mm = 2.5 cm
0.005741 kL = 574,100,000 cL
Some antibiotics can harm a cell's ribosomes. Which of the following would you predict to be the most likely long-term effect of damage to ribosomes?
Errors would be made during DNA replication, resulting in mutations and defects in the cell.
Proteins would not be modified after being synthesized, so they would not function properly.
The cell would not be able to create the proteins needed for important functions and growth.
Waste products would not be broken down and disposed of properly, causing the cell to die.
Answer:
These five major trends pose a major global threat to the planet
Explanation:
These five major trends pose a major global threat to the planet. If the world is to maintain the habitat of humans and other species. These environmental problems must be resolve. DW discussed the reasons and possible solutions.
Air pollution and climate change
Problems
Carbon overload in the atmosphere and seawater. The CO2 in the atmosphere absorbs and re-emits infrared wavelength radiation. Which causes the air, soil, and ocean surface water to warm. Which is a good thing without this, the earth would freeze. Unfortunately, there is too much carbon in the air now.
The burning of fossil fuels, agricultural deforestation, and industrial activities have increased the concentration of carbon dioxide in the atmosphere from 280 parts per million (ppm) 200 years ago to about 400 pm today. Whether it is scale or speed, this is unprecedented growth. The result: a change in the climate.
Carbon overload is just one form of air pollution caused by burning coal, oil, natural gas, and wood. The World Health Organization recently estimate that one in nine deaths in 2012 were caused by diseases caused by carcinogens and other poisons in the polluted air.
Solution:
Replace fossil fuels with renewable energy. Forest restoration. Reduce agricultural emissions. Changing industrial processes, The good news is that clean energy is abundant, but it needs to be harvest.
Many people say that it is feasible to use existing technologies to achieve a 100% renewable energy future, but the bad news is that even though renewable energy infrastructure (solar panels, wind turbines, energy storage, and power distribution systems) are widely available and Become cheaper and more efficient.
Experts have always said that our applications are not fast enough to avoid catastrophic climate damage.
Deforestation
Problem
Species-rich wild forests are destroye, especially in tropical areas. Usually to make way for cattle farms, soybean or palm oil plantations, or other monocultures. Today, about 30% of the earth’s land area covers by forests.
This is about half of what it was before agriculture started about 11,000 years ago. Approximately 7.3 million hectares (18 million acres) of forest are destroyed every year, mainly in the tropics. Therefore Tropical forests used to account for about 15% of the earth’s land surface; now they have fallen to 6% or 7%.
Solution
Most of the remainder has degraded by logging or burning. Natural forests are not only a reservoir of biodiversity but also a carbon sink. Excluding carbon from the atmosphere and ocean.
Therefore Restore degraded areas by replanting native tree species. This requires strong governance. But many tropical countries are still developing, their populations are growing. So that The rule of law is unbalanced, and cronyism and bribery are common in allocating land use.
S
Hello may anyone help me with this? youd be such a life saver :)
Answer:
Show the picture better for people to see
Explanation: