Answer:it’s the first, second, and fourth ones.
Explanation: I got it right on edgenuity
Answer:
1
2
4
Explanation: Took on Edg
The heart contracts twice for every heartbeat one contraction is the atrial contraction while the other is the venture true or false
Answer:
True. The heart contracts twice per heartbeat. One contraction is the ventricular and the other one is the artrial.
Sam is investigating the factors that affect photosynthesis. She keeps some plants in the dark for 24 - 48 hours. They receive no light. What does this remove from the plants?
Answer:
In photosynthesis, sunlight is necessary for it allows the plant to synthesize food from the CO2 and water. Without the light, it cannot carry out photosynthesis and create the food to feed itself.
By keeping some plants in the dark, Sam is removing the ability of the plant to capture light for photosynthesis.
Photosynthesis is a process whereby green plants capture light energy for the synthesis of carbohydrates using inorganic raw materials such as water and carbon dioxide.
The process of photosynthesis takes place in 2 major steps
Light-dependent reactionLight-independent reactionDuring light-dependent reaction, energy from light excites chlorophyll molecules and cause an electron to be displaced. The electron in the chlorophyll is replaced by the electron in water, leading to the cleavage of the bond between H and O and the evolution of O2. ATP and NADPH are produced and these are utilized in the light-independent reaction.
In the light-independent reaction, the molecules synthesized from the light-dependent reaction are used to fix carbon dioxide in a series of reactions resulting in the formation of carbohydrates.
Hence, keeping some plants in the dark will alt the light-dependent reaction and the entire photosynthesis process at large.
More on photosynthesis can be found here: rainly.com/question/1388366
Because we can't see through a gas cloud, we would not use optical telescopes which collect
visible light to form images of stars inside a gas cloud. Which type of telescope would we use
to study new stars inside the giant gas cloud and why?
ANSWER ASAP
Answer: radio telescopes can be used.
Explanation:
Radio telescopes can be used to see through the dust and the star being born. The stars are born into clouds of gases in the space. Due to gravity more and more gas get collected and it forms a clump. When the clump get big enough the hydrogen atom crash each other to form the helium. The clump of gas becomes a star. The radio telescopes can be used to take pictures of these stars within the clump of gas. It can also be used to take picture of fusion of gases within a star to initiate the formation of new star.
Answer:
It's an infrared telescope.
Explanation:
We can't rely on an optical telescope since it only shows what we can see. In turn, we can use an infrared telescope because it allows us to see heat. We can use this heat to study celestial bodies, stars, and gases.
All of the following statements would be supported by the cell theory EXCEPT Your answer: Cells may grow to an unlimited size. All cells come from other cells. All living things are made of cells.
Answer:
The answer is Cells may grow to an unlimited size.
Explanation:
Cells cannot support itself when the volume increases more than the surface area of the cell which will lead to the cell rupturing. But, cells do form from other cells and every living thing is made of cells.
I hope I helped, please correct me if i'm wrong!
Blood that is rich in oxygen leaves the heart through the _____. aorta septum right ventricle left atrium
The left atrium.
Hope it helps!
The diagram shows how a community will colonize bare rock, and then change over hundreds of years.
n this example, what is the main cause of the changes that the community undergoes?
a
ecological succession, because each community promotes the growth of the succeeding community
b
climate change, because each community is determined by climate
c
extreme weather events, such as hurricanes, because they disrupt one community and open niches for a new community
d
tectonic events, such as earthquakes, because they disrupt one community and open niches for a new community
Answer:
a
. ecological succession, because each community promotes the growth of the succeeding community
Explanation:
Ecological succession is the process in which species structure of an ecological community changes over time.
The given example shows ecological succession (secondary succession) as in the image series of community changes over hundred of years including growth of community from bare rocks to trees as each community is promoting growth of succeeding community. But the colonized community of trees after series of changes is disturbed by human activities or natural calamity (as shown in image) reduces an already established ecosystem is called secondary succession (Type of ecological succession).
Hence, the correct option is a. ecological succession, because each community promotes the growth of the succeeding community
Which of the following statements about blood pH is true?
A. Carbon dioxide is a buffer that helps the blood pH remain around 7.4.
B. Carbonic acid is a waste product that makes blood pH deviate from 7.4.
C. 7.4 is a neutral pH, and the whole body needs to remain neutral to maintain homeostasis.
D. At a pH too far from 7.4, enzymes in the blood will stop functioning properly.
Answer:
D. At a pH too far from 7.4, enzymes in the blood will stop functioning properly.
Explanation:
The pH of blood is regulated 7.35 and 7.45. pH shows acid-base balance in the body and maintains a healthy balance of acidity and alkalinity.
Balance of acid-base provides optimum condition to enzymes to perform proper function. As, enzymes required optimum pH range for functioning properly, pH too far from 7.4 can denature the enzymes. Enzymes will lose its shape and will not function properly at high pH.
Hence, the correct option is D.
When would a diameter cut be appropriate?
O A problem in a 3-foot section of the tree
O A large blemish that ran the full length of the tree
O A disease from the bark had ruined the wood underneath it
One end of the tree was significantly narrower than the other
Answer:
A problem in a 3-foot section of the tree
Explanation:
it is the most reasonable way to choose
Which of the following parts of ruminant stomach is called the honeycomb? And why?
A. Rumen
B. Reticulum
C. Abomasum
D. Omasum
Answer:
Hello
I think Reticulum is right.
Explanation:
Indicate which syllable receives emphasis one pronouncing collagen
Answer:
kaa·luh·jn
Explanation:
The first syllable has the emphasis.
Do you think our homes and schools
should be powered by renewable energy?
Answer:
No. Because then every 2 years or so we would have to replace everything because the resource is limited
Explanation:
I would say yes. As non renewable energy will come for a long time but once used up u cant get it again because they are over. but renewable energy even if it takes time to renew it will never get over. so in that way will be able to save non renewable energy for a more important purpose.
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Explain two complex modes of human inheritance. Give examples.
Answer:
the pleiotropy and epistasis (more info below)
Explanation:
Many human traits have dynamic forms of ancestry. We can be regulated by a single gene with several alleles, or by several genes. Further complication can be added by pleiotropy (one gene, multiple effect) and epistasis (gene-gene interaction). A number of hereditary diseases are triggered by defects in one or a few genes. examples: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive, and mitochondrial.
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What is the main difference between carbohydrates and proteins
Answer:
Carbohydrates is an energy giving food therefore the end product is glucose, while protein is a body giving food therefore the end product is amino acid.
hi please help this question is based on what you think
Does luck play a roll in evolution ? EXPLAIN WELL.
Answer:
Yes
Explanation:
If u want to equate that with “luck” feel free. There are any number of points in natural history where any species, not just us, could have turned out very differently.
Had the climate not changed in Africa…. Forcing our distant relatives from the forested areas into the plains… We might very well still number among the “great apes” rather than the genus “Homo”.
There would be dozens of simialar “what ifs” in our past. The entire spectrum of life on Earth might have turned out very differently indeed had the Permian Extinction not happened…. Those life-forms that populated the Earth prior to this event were very different than those that evolved from the few survivors. (Over 90% of all life on Earth was presumed to have been killed off.)
Raccoons and red pandas have more similar DNA sequences than red
pandas and giant pandas do. What does that tell scientists?
A. Red pandas and giant pandas share a more recent common
ancestor than red pandas and raccoons.
B. Red pandas and raccoons share a more recent common ancestor
than red pandas and giant pandas.
C. Raccoons descended from red pandas.
D. Red pandas descended from giant pandas.
Answer:
B. Red pandas and raccoons share a more recent common ancestor
than red pandas and giant pandas.
Explanation:
DNA sequencing is finding the sequence of base pairs in an organism's DNA, and it's often used to compare with other organisms. The more base pairs that are the same, the more similar the two organisms are, and this means that they share a more recent common ancestor.
We can't make any conclusions like C and D because we just don't have enough data to conclude that one descended from the other.
Answer: B
Explanation:
Red pandas and raccoons share a more recent common ancestor.
You are working in a lab and think you may be observing a new organism. What minimal level of structural organization would you need to be observing? What are some characteristics you would need to observe to ensure that it is a living organism?
Answer:
observe it's heart you would notice some sounds and to that the chest ot the organism is going up and down....and also a new organism you must make sure you check all it's body with microscope cause you don't really know if it's deadly or friendly appearances can be deceptive
First of all observe the heart you would notice some sounds and after that check chest of the organism properly working or not that is going up and down and check the organism under microscope properly.
What are the characteristics of living organisms?The main characteristics of living organisms are movement, reproduction, ability to sense the environment,and growth and development. Some internal features such as metabolism, self- replication,and self- organization, interaction all these abilities are obtained by living organisms.
The living organism grows in shape and size throughout his whole life, perform metabolic action, interaction ability as well as adaptation and respiration is the main characters of living organisms.
Living things can reproduce their young ones who are similar genetically as well as identically. They have capacity to feed their young ones.
Therefore,first of all observe the heart you would notice some sounds and after that check chest of the organism properly working or not that is going up and down and check the organism under microscope properly.
Learn more about living organisms here:
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Describe the life cycle of amphibians using an example.
Answer:
In typical amphibian development, eggs are laid in water and larvae are adapted to an aquatic lifestyle. Frogs, toads, and newts all hatch from the eggs as larvae with external gills but it will take some time for the amphibians to interact outside with pulmonary respiration. Afterwards, newt larvae start a predatory lifestyle, while tadpoles mostly scrape food off surfaces with their tooth ridges.
Outline the phases of the menstrual cycle, or the period in woman. please this should be at least 150 words. I will mark as BRIANILIST, please don't copy from Google, thank you.
Answer:
Menstruation, the follicular process, the ovulation and the luteal period are the four stages of the menstrual cycle. Specific menstrual complications include extreme or painful spells and a premenstrual syndrome (PMS). Knowing that a woman is most likely to conceive in the menstrual cycle can increase the chance of pregnancy. in simpler words, Bleeding phase, Pre-fertile phase, Fertile phase, Releasing an egg (ovulation), Post-fertile phase.Estrogen rates increase and fall periodically during the menstrual cycle. Estrogen rates increase during the mid-follicular process, then drop precipitously after ovulation. This is followed by a secondary increase in estrogen levels during the mid-UT phase, with a decrease at the end of the menstrual cycle.Elevated levels of estrogen are a risk factor for breast and ovarian cancer. High levels of estrogen can increase your risk of blood clots and stroke. Estrogen superiority can also improve the risk of developing a thyroid disorder. This may contribute to signs such as exhaustion and increases in weight.
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Which of the following causes ozone depletion?
A. coal burning power plants releasing large amounts of sulfur
B. foaming agents or plastics releasing chloroflourocarbons
C. excessive carbon dioxide blanketing the earth
D. overuse of nitrogen-containing materials polluting bodies of water
Answer:
B. foaming agents or plastics releasing chloroflourocarbons
Explanation:
Causes : chlorofluorocarbon (CFCs), halons, and other compounds deplete the ozone layer. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. CFCs and halons break down into chlorine and bromine which in turn destroy the ozone layer.
Answer:
Hello There. The correct answer is C. excessive carbon dioxide blanketing the Earth.
Explanation:
Because it means that Carbon dioxide spreads around the planet like a blanket, and is one of the main gases responsible for the absorption of infrared radiation (felt as heat), which comprises the bulk of solar energy. Hope It Helps! .ω.
what causes the phase of the moon?
A.The earth's shadow on the moon.
B.How much of the sunlit side of the moon faces Earth
C.Clouds blocking the moon's light.
Answer:
The answer is most likely B
Explanation:
Sunlight Side of the moon Faces
Strawberry plants reproduce by using _____. fertilization stolons corms meiosis
Answer:
Stolons
Explanation:
Stolons are long stems that grow sideways from a strawberry plant. This is usually the method used for reproduction in strawberry plants.
I hope this answer helped you!
- hershy103
Since the supercontinent Pangaea split up ~200 million years ago, the continents have remained in essentially the same positions. Do you agree?
Answer:
não concordo
Explanation:
pois com o passar do tempo por causa de algumas influencias naturais os continentes vão mudando de forma e posições
What motion is observed in a horse once the ischial arch is passed with a urinary catheter?
A) it lowers its head
B) its stomps its left front foot
C) it raises its tail
Answer: Option A.
It lowers the head.
Explanation:
The ischial arch is a prominent structure closer to the colliculus seminalis of horse. The ejaculatory duct is lateral to this and correspond to the area of ductus differenc eand vesicular gland opening.
The vesicular glands can be easily catheterized using a small-diammeter, flexible polyethylene catheter or a stylet . The catheter is inserted into the instrument channel of the videoendoscope and serves as a route for direct aspiration of fluid or instillation of pharmacologic solutions for direct treatment.It also helps to guide the scope head into the seminal vesicle .
Produces four daughter cells
Mitosis or meiosis
Answer:
Meiosis
Explanation:
Mitosis and meiosis are both types of cell divisions.
In mitosis, a parent cell undergoes one division and produces an identical, diploid cell. This results in 2 daughter cells.
In meiosis, a parent cell undergoes two divisions. This produces unique, haploid cells. The result is 4 daughter cells that are not identical to the parent cell.
Therefore, the answer is meiosis. Meiosis produces four daughter cells.
Which is released during the formation of a peride bond?
A five-carbon sugar
An amino group
An amino acid
A water molecule
Explanation:
an amino group
A physician conducts a survey among 100 patients suffering from migraine headaches severity among his patients. What kind of data analysis would he apply to interpret the results obtained from this survey?
Answer:
The correct answer should be D) Qualitative and inferential
Answer:
Qualitative and inferential
Explanation:
If a female who is a carrier for colorblindness carries a man who is color blind. What is the percent chance their daughter will be colorblind.
Answer:
If both a female carrier and a male carrier of a color blind gene have a daughter, there will be a 50% chance of them also being colorblind.
Explanation:
which of the following best describes the changes that take place in an ecosystem during primary succession
The given question is incomplete, the complete question is:
Which of the following best describes the changes that take place in an ecosystem during primary succession?
Lichens and mosses grow slowly on newly formed land, followed by grasses, shrubs, and trees.
Shrubs and trees regrow quickly in areas that have been disturbed by a forest fire.
Organisms compete for resources, and those that are best fit to survive establish themselves as the dominant species.
Natural disasters cause many populations to migrate to a new location in order to survive
Answer:
The correct answer is that the growth of lichens and mosses takes place gradually on the freshly formed land, and is succeeded by shrubs, grasses, and trees.
Explanation:
An array of changes that takes place within an ecosystem's biotic community with regard to modifications that occurs with time within the non-living constituents of an ecosystem until stability is attained within the ecosystem is termed as ecological succession. A succession, which takes place in a previous barren land where there is no existence of life is known as primary succession.
For example, a gradual growth of mosses and lichens on a freshly formed land, succeeded by shrubs, grasses, and trees is an illustration of primary succession. The pioneer species like mosses and lichens possesses the tendency to grow on the land, that is, not inhabited previously by any other species of plant and further helps in the growth of novel species of plants.
On the bare rocks, lichens discharge acids that assist in the process of rock withering as it reduces the compaction of the rocks. Further, the aggregation of soil takes place that facilitates the growth of mosses. Eventually, the mosses help in bettering the quality of the soil, which further helps in the growth of shrubs, grasses, and trees.
Answer: Explanation:
The person who asked this question didn't put any choices, so I am going to give you some examples of primary and secondary successions.
First what is primary and secondary succession?
Primary succession: it is the profession of growth, it developed on newly formed land.
Secondary succession: it is the redevelopment of a habitat that has been disturbed by an event such as a forest fire or a hurricane. “Tsunami, earthquake, or forest fire”
If you have answer choices like these(A) Lichens and mosses grow slowly on newly formed land, followed by grasses, shrubs, and trees.
(B) Shrubs and trees regrow quickly in areas that have been disturbed by a forest fire.
(C) Organisms compete for resources, and those that are best fit to survive establish themselves as the dominant species.
(D) Natural disasters cause many populations to migrate to a new location in order to survive.
Then your answer is:(A) Lichens and mosses grow slowly on newly formed land, followed by grasses, shrubs, and trees.
Why not the other choices?
Because; "(B) Shrubs and trees regrow quickly in areas that have been disturbed by a forest fire" That is secondary succession, (redevelopment of a habitat that has been disturbed)
Because; "(C) Organisms compete for resources, and those that are best fit to survive establish themselves as the dominant species." Just doesn't fit the description for either Primary or secondary succession.
Because; "(D) Natural disasters cause many populations to migrate to a new location in order to survive." That isn't either Primary or secondary succession because Primary succession is "newly growth" and secondary succession is "redeveloped habitat".
Using two of the following vocabulary words, explain how rainbows form: transmission, refraction, reflection, or absorption.
Answer:
refraction and reflaction
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How do you form a contraction?
Answer:
Contractions are formed when words are shortened by omitting one or more letters, most often replaced by an apostrophe. Contractions most frequently occur when two terms that usually appear next to each other in a sentence are merged into a new , unique phrase. Hope this helped!