Answer:
Asteroid impacts were uncommon when life presumed to have happened
Explanation:
The primordial soup hypothesis is based upon the impact that the asteroids had on Earth and the development of life on it. The hypothesis suggests that the asteroids were carrying the basic ingredients for life to develop, so they ''seeded'' the earth with life. Also, this hypothesis suggests that there were constant bombarding by asteroids, so they brought in lot of organic material with them. If it is proven wrong that there were lot of asteroids falling on Earth at the period when life is presumed to have begun, but instead that they were very few, this hypothesis will easily be dismissed. The reason why it will easily be dismissed is that it will lose the base around it is formed, and without it, it will have nothing as its basis.
Answer:
Option 4.
Explanation:
Primordial soup hypothesis explains that the early life has been originated in the ocean. The idea of primordial soup was first stated by Oparin and Haldane.
The early earth's atmosphere contains large amount of water, carbon dioxide, warm ocean and traces of various gases.Thunder, lightning ans asteroid impact is common in the early earth's atmosphere. . Thus, uncommon asteroid impact weakens the hypothesis of primordial soup.
Thus, the correct answer is option 4.
How does the biosphere interact with the atmosphere
As all the spheres, the biosphere and the atmosphere are in constant interaction with each other. The atmosphere is the sphere made out of gases, while the biosphere is the sphere made out of all the living organisms. The living organisms use the gases from the atmosphere for their functioning. As they use them, they either store them, release them as waste products, or change them. Once their usage is finished, the biosphere releases the majority of the gases back to the atmosphere, being also able to influence its composition on the long run. An excellent example of the interaction between the biosphere and the atmosphere, as well as the effect that it can have, is with the emerging of the cyanobacteria. The cyanobacteria used the carbon dioxide from the atmosphere for the process of photosynthesis. By using the carbon dioxide, the cyanobacteria has reduced the amount of this gas in the atmosphere. On the other hand, once used, the atom of oxygen from the carbon dioxide has been released into the atmosphere, gradually resulting in an increase in the oxygen levels in the atmosphere, making it the second most present gas in it. That resulted into enabling living conditions for other organisms to evolve and develop, and the circle has been continuing ever since.
The biosphere interacts with the atmosphere through processes like photosynthesis, respiration, and climate regulation.
The biosphere refers to the part of the Earth where life exists, which includes the atmosphere, lithosphere (Earth's crust), and hydrosphere (water bodies). The interaction between the biosphere and the atmosphere is crucial for various processes. For example, plants in the biosphere undergo photosynthesis and release oxygen into the atmosphere, while animals in the biosphere consume oxygen and release carbon dioxide.
Additionally, the atmosphere provides gases that are vital for the biosphere. For example, carbon dioxide in the atmosphere is used by plants during photosynthesis, and oxygen in the atmosphere is utilized by animals for respiration. The biosphere and atmosphere also have a reciprocal relationship in terms of climate regulation. The biosphere influences the atmosphere through processes like transpiration, which affects humidity and precipitation patterns, while the atmosphere impacts the biosphere through weather events such as droughts or hurricanes.
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Glucose molecules from food sources provide energy to the cells of the human body. After a person eats, the level of glucose in their blood increases. If a person's blood glucose level becomes too high, a hormone in the pancreas, known as insulin, is released. Insulin helps move glucose out of the bloodstream. This causes the blood glucose level to decrease and return to equilibrium. The production of insulin is a mechanism that regulates the human body's internal environment and aids in A. the storage of genetic information within cells. B. the production of sugar molecules through photosynthesis. C. the production of carbon dioxide through cellular respiration. D. the maintenance of homeostasis within the body system.
Answer:
D. the maintenance of homeostasis within the body system.
Explanation:
Answer:
A: The maintenance of homeostasis within the body system
Explanation:
Study Island
In the _______ cycle, a virus integrates its DNA into the host's DNA, and its DNA is replicated when the host DNA is replicated.
A. lysogenic
B. infectious
C. retroviral
D. lytic
Answer:
The correct answer is option A. "lysogenic".
Explanation:
During a viral infection, the virus uses different cycles of reproduction to achieve its goal of replicating itself inside a host organism. In the lysogenic cycle the virus integrate its DNA into the host genome, using the host replication system to replicate its own DNA along with the DNA of the host. During this cycle the host continues to live and reproduce normally as no pathogenicity is still evident from the virus.
Energy for use in cells is stored in form of 1.chemical bond energy 2.physical energy 3.heat energy 4.mechanical energy.
Answer:
pretty sure its 1
Explanation:
Energy for use in cells is stored predominantly in the form of chemical bond energy. When chemical bonds are broken, like in metabolism of glucose, stored energy is unlocked and utilized. Other forms of energy - mechanical, heat, radiant, and electrical - are involved in energy conversions but not typically stored in the same way.
Explanation:In the context of cell function, energy is primarily stored in the form of chemical bond energy. For instance, chemical energy, a type of potential energy, is stored in molecules like glucose in our cells. When the chemical bonds of glucose are broken down in a process called metabolism, this stored energy is released and used by the cells. This is unlike mechanical, heat, or physical energy, which are involved in energy transformations but not typically stored for use by cells.
It's important to note that mechanical energy powers physical activity while radiant energy is emitted as waves such as in sunlight and heat energy is generally involved in substance conversion. Electrical energy, on the other hand, is the power of moving electrons.
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What is the most abundant vertebrate on earth?
Susan is conducting an experiment to see if plants will grow better with application of fertilizer. She separates 50 plants into two groups of 25. One group receives a liquid fertilizer when watered every other day, and the other group receives only water on the same days. The plants are kept in a greenhouse with constant and equal amounts of sunlight, and a constant temperature. She measures the plants once a week for 12 weeks. At the end of 12 weeks, the plants with the fertilizer grew an average of 9 inches, and the ones that were not given the fertilizer grew an average of 5 inches. In this scenario, the plants that received fertilizer are the __________ group, and the plants that did not receive fertilizer are the ____________ group.Contro
Answer:
First blank: Experimental or test
Second blank: Control group
Explanation:
To distinguish control versus experimental group just remember that in a control group the independent variable is controlled or held constant. In the experimental group the independent variable is changed.
In other words, the experimental group is the group that receives the treatment, or test.
This type is done to isolate the effects of the independent variable. What happens all variables in both groups are kept the same. The only difference is the independent variable should change in one to reliably determine whether the changes in the dependent variable(in this case plant growth) was caused by the independent variable (fertilizer).
Answer:
The correct answer will be option-
1. The experimental group
2. The control group
Explanation:
In the given question the key variable to be studied or independent variable is the application of the fertilizer. A scientific experiment is designed in a way that the samples must be grouped into two categories: the experimental group and the control group.
The experimental group is the group which receives the key variable to be tested which is the fertilizer. So the samples which received the fertilizer belongs to the experimental; group.
The control group is the group of samples which lacks the key variable to be studied, so the samples which did not receive any fertilizer will be considered a control group.
Which of these claims is supported by scientific evidence?
Answer: in the last 10 years, sea level has risen twice as fast as in previous centuries
Explanation:
Natural selection changes allele frequencies because some _______ survive and reproduce more successfully than others.
Answer:
E) individuals
Explanation:
The ______ period ended in the greatest extinction of the phanerozoic eon.
Answer:
The Permian period ended in the greatest extinction of the phanerozoic eon.
Final answer:
The greatest extinction of the Phanerozoic Eon occurred at the end of the Permian period, known as the Permian extinction. It resulted in the loss of a significant amount of marine and terrestrial species. Volcanic activity and global warming are believed to have played a role in this mass extinction event.
Explanation:
The greatest extinction of the Phanerozoic Eon occurred at the end of the Permian period, which is part of the Paleozoic Era. This extinction event, known as the Permian extinction, was the largest in Earth's history, resulting in the loss of approximately 96 percent of marine species and 70 percent of terrestrial species. It is believed that widespread volcanic activity and a runaway global-warming event contributed to this mass extinction.
A researcher wonders whether an acidic environment affects the growth of frogs. She varies the pH in five different tanks containing ten tadpoles each, and measures the length of the frogs after one year. All frog tanks are provided the same amount of food. What is the dependent variable in this experiment?
a. pH of the tanks
b. number of tanks
c. amount of food
d. length of frogs
Answer:
answer choice is A.
Explanation:
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Which of the following are causes of evolutionary change? 1)Genetic drift 2) Natural selection 3) Gene flow 4)Mutation
Evolutionary change is caused by four primary mechanisms: Genetic drift, natural selection, gene flow, and mutation. Each of these mechanisms contribute to the diversity and adaptation of populations.
Explanation:The causes of evolutionary change are: 1) Genetic drift, 2) Natural selection, 3) Gene flow and 4) Mutation.
Genetic drift refers to random changes in the frequencies of alleles within a population. It can result in significant changes in a population's genome, especially in small populations.
Natural selection is the process by which traits that enhance survival and reproduction become more common in successive generations of a population. It drives the adaptation of populations to their environments and is a key mechanism of evolution.
Gene flow happens when individuals from one population migrate to and breed in a second population. This can introduce new genetic variations to the receiving population.
Mutation refers to changes in an organism's DNA. It can introduce novel genotypic and phenotypic variations to a species over time, and is a key driver of diversity in populations.
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You are responding to a call where an 8-year-old has been stung by a wasp. his skin is pale with patches of raised red spots on his hands, arms, and face. these spots are most likely what?
Answer:
an allergic reaction to the wasp bite
Explanation:
this happens when a wasp first stings u it's only temporary of course
Which of the following is NOT one of the basic functions performed by the nervous system?
sensory input
integration
developmental growth
output
Answer:
developmental growth would be the answer
Answer: Developmental Growth
Explanation:
The nervous system of the body is known for the conduction of message from brain to various parts of the body.
It includes, input, integration and out. Developmental growth is mainly controlled by growth hormones which is secreted from the pituitary gland.
This is not a basic function of nervous system, it is a function of endocrine glands.
Graphs are _____ of relationships.
Answer:
Diagrammatic representation
Explanation:
Graphs are diagrammatic representation of relationships.
Answer:
Geometrical representation
Explanation:
Graphs are geometric representations of relationships presented through a data set used to facilitate understanding of the information presented in that set. Charts help you quickly identify patterns, verify results, and compare measurements. In addition, they can be used in many ways and in different areas of knowledge.
A difference between monocot and dicot angiosperm flowers that can help identify them is that dicots A. Grow flowers with petals in multiples of 4s and 5s. B. Grow flowers with petals in multiples of 3s. C. Don't grow flowers. D. Don't grow pink flowers.
A difference between monocot and dicot angiosperm flowers that can help identify them is that dicots Grow flowers with petals in multiples of 4s and 5s.
How can dicots and monocots be identified?Dicot flowers have a precise number of sepals, or petals, that make them multicolored. The number of petals in dicots occurs in groups of four or five.Tetramerous flowers have four petals in multiples of four, whereas pentamerous blooms have five petals in multiples of five.Monocots have three sepals and three petals on average. Petaloid or petal-like sepals are defined as having the shape and color of petals in some circumstances. Monocot blooms have six stamens on average.learn more about monocot and dicot here:
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Mammals that give birth to fully developed live young are termed
Answer:
Viviparous
Explanation:
I think that's the word you are looking for
Viviparous animals give birth to live offspring after they have developed in the parent's body
The opposite of this would be Oviparous, meaning an animal that lays eggs.(birds, etc)
Fun fact:
the echidna (also known as a spiny anteater) and the duck-billed platypus are the only mammals known to lay eggs!
The blind spot is located in the area of the retina
Answer:
true
Explanation:
Answer:
where the optic nerve leaves the eye
Explanation:
Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things
Answer:
Label A; Respiration
Explanation:
Respiration identifies the part of the atp molecule that changes when energy is released in the cells of all living things.
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The label that identifies the part of the ATP molecule that changes when energy is released in the cells of all living things is the phosphate group.
ATP, or adenosine triphosphate, is a molecule that stores and carries energy within cells. It consists of ribose sugar, an adenine base, and three phosphate groups.
When energy is needed for cellular activities, the high-energy phosphate bond between the last two phosphate groups is broken through hydrolysis, releasing a phosphate group and forming ADP (adenosine diphosphate) along with a free phosphate.
This process releases energy that can be used to power various cellular functions, such as muscle contractions, active transport, and enzyme-catalyzed reactions, supporting the vital processes of living organisms.
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What codes for proteins?
A. DNA
B. RNA
C. Polypeptides
D. Amino acids
Answer:
D. Amino Acids
Explanation:
DNA and RNA viruses are included in an organism's genome. The genome component that codes for a protein or RNA is called a gene. The protein-coding genes consist of tri-nucleotide units called codons, each with an amino acid code.
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An example of natural selection is the red color of a male cardinal. The females of the species choose mates based on the vibrant colors of the males' feathers. If females begin using different criteria than feather color when they choose mates, what would most likely happen to the color of the male cardinals over time?
How can you reduce the amount of waste you send to landfills?
Answer:
By reducing , segregating and compressing
Explanation:
The solid waste being sent to the landfill site can be reduced in following ways -
a) Segregating the organic and inorganic waste. Since organic waste can be decomposed, it must be treated separately instead of dumping into landfill.
b) Reducing the volume of solid waste through compressing at waste handling plants instead of directly dumping into land fill sites.
c) All the reusable and recyclable waste such as plastic, paper, glass must also be segregated at the point source.
During which stage does land get ready for the arrival of new species? A. migration B. ecesis C. nudation D. reaction E. competition
Answer:
C. nudation
Explanation:
When an ecological system has been destroyed by some catastrophe, what is left is usually barren land. This barren land is not suitable for the majority of the organisms to live on it, so changes are needed. Nudation is the first process, and it is part of the primary succession. This process is actually the one responsible for the minor changes that happen on the barren land, preparing it slowly for the organisms to be able to move into it and start developing a new ecosystem.
Answer:
Nudation
Explanation:
Disturbance initiates the prosses of succession. Both abiotic and biotic factors cause disturbances. At this stage, the bare land without any living organisms develops for the arrival of new species. ( Monoclimax theory)
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Many scientists think that genetically modified crops will be pivotal in addressing the growing food demand. Do you agree with this belief? Explain your answer.
Answer:
Not necessarily pivotal, but it would be just dumb not use every opportunity to
increase food security, food safety and healthiness, yield efficiency, ressource efficiency, farmers' safety and last but not least reduce carbon emissions.
I don't think that when they invented the Haber-Bosch process they debated about wether it was 'pivotal' in order to feed the world's population - although in hindsight, it absolutely was!
They just used it because everyone profited from it.
Today, we're in the same situation with biotechnology.
Answer:
Yes. We have only a limited amount of land and space, and every plant is adapted to its own environment. Through gene manipulation, we could perhaps create plants that can grow in a wide variety of environments, grow taller or wider, or be more resistant to diseases
Explanation:
A family has seven sons. The chance that their eighth child will be a daughter is _____. One chance in seven, one chance in eight, one chance in two, practically none
Answer:
they have 7 boys so i would say 1in 8 chance
Explanation:
Which piece of evidence from the passage supports the theory that humans may not have been responsible for the extinction of the woolly mammoth?
A.discovery of sites of mass mammoth kills
A.
discovery of sites of mass mammoth kills
B.a land bridge that connected Asia to North America
B.
a land bridge that connected Asia to North America
C.discovery of traces of ancient mammoth DNA in Alaska dating to 10,500 years ago
C.
discovery of traces of ancient mammoth DNA in Alaska dating to 10,500 years ago
D.carbon dating that indicates the mammoths died between 13,000 and 15,000 years ago
D.
carbon dating that indicates the mammoths died between 13,000 and 15,000 years ago
The discovery of ancient mammoth DNA dating to 10,500 years ago indicates that woolly mammoths survived beyond the time of significant human influence, suggesting that other factors may have driven their extinction.
Explanation:The piece of evidence from the passage that supports the theory that humans may not have been responsible for the extinction of the woolly mammoth could be C. the discovery of traces of ancient mammoth DNA in Alaska dating to 10,500 years ago. This evidence indicates that woolly mammoths survived beyond the time when humans grew in number and began to have a substantial impact on their environment. This suggests that other factors - such as rapid climate change or disease - may have played a significant role in the mammoths' extinction.
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Cells have receptors on their surfaces to sense their environment and to communicate with other cells. Viruses use these cell receptors to
A. cause the cell to disintegrate, or lyse.
B. insert their genetic material into the cellular genetic material.
C. cause the cell to move to an area well suited for viral replication.
D. enter the cell.
Answer:
D. enter the cell.
Explanation:
The cell surface receptors present at the surface of host cells are used by viruses to enter the cell. During their attachment to the host cell, viruses recognize and bind to the cell surface receptors of the host cells. This is followed by the entry of nucleocapsid or nucleic acid of the virus into the host cell.
In this way, viruses use the cell surface receptors of the host cells during their adsorption to the host cells.
A woman is experiencing back labor and complains of constant, intense pain in her lower back. what is an effective relief measure?
Back labor as the name implies is a very intense pain in the lower back experienced by pregnant women as the expected date of delivery gets closer. It is usually caused by undue pressure on the spine due to incorrect positioning of the baby.
There are several options that can effectively relieve back labor.
They are:
An Epidural Anaesthesia: This is a type of pain relief drug that is injected into the back to reduce pain in the back or in other parts of the body. This is usually administered at the discretion of the anesthesiologist;Regular Pain Relief medicationTaking a physical position to relieve the pain pressure point: Usually, the pain in the lower back is caused by the baby pressing against the lower spine. By adopting an all-fours position, and resting one's head on a pillow or other material that help to support the head, the pressure is eased off the back for some time;Ambulation: This simply means walking around. Crouching, or trying out various positions with the body such as squatting may also help to reduce the pressure off the spine
Other forms of pain relief procedures that may work are:
Reflexology or Acupuncture: the practice of using the finger to place a firm pressure below the center of the ball of the foot.Hydrotherapy: The application of hot and cold compress against the lower back in an alternating pattern.Learn more about back labor pain here:
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Amy got up late this morning so she skipped breakfast and went straight to her soccer practice. which fuel source is her body relying upon to supply the glucose that her brain needs to function?
If a cell loses control of gene expression what happens?
Answer:
Abnormal, unhealthy cells will develop.
Which of the passages from lincoln's gettysburg address uses logic and reason?
A.we have come to dedicate a portion of that field
B.the brave men,living and,dead who struggled here
C.here gave the last full measure of devotion
Answer:
B.the brave men,living and,dead who struggled here
Explanation:
Answer:
B. the brave men, living and, deaf who struggled here