1. The right answer is The nebular hypothesis.
Scientists agree that our solar system results from the contraction, under the effect of its own mass, of a cold and dense interstellar molecular cloud made of gas, hydrogen, and helium essentially, and grains dust covered with ice water. Very quickly, a disc of matter would have formed, turning on itself, slowly on the periphery, quickly in the center. There, at the heart of the disc, the matter being more and more compressed by the movement and the increasing temperature, nuclear fusion reactions would eventually have started. This heart would have started to shine by releasing a phenomenal energy, giving birth to our star, the Sun, 4.56 billion years ago. The rest of the cloud would have continued to gravitate around this very young star, the most volatile compounds being rejected at the periphery under the effect of the very high temperature.
In this primordial nebula, the dust would have progressively agglomerated, forming grains that would have gathered together step by step in boulders, which by aggregating would have gradually given birth to the 9 planets of the solar system, their satellites, and meteorites.
2. The right answer is lines of longitude.
Longitude is a geographical coordinate represented by an angular value, an expression of the east-west position of a point on Earth (or on another sphere). The reference longitude on Earth is the Greenwich meridian.
3. The right answer is topographic map shows elevation.
A topographic map is a reduced-scale map representing the relief determined by altimetry and the human features of a geographical area in a precise and detailed manner on a horizontal plane.
Name one negative consequence of exponential human population growth.
greater biodiversity
increased pollution
longer life expectancy
Answer:
The correct answer is "B" increased pollution
Explanation:
got it on USAtestprep ;D
Several atmospheric gases contribute to global warming: carbon dioxide, methane, and nitrous oxide. Considering this, which choice would do the LEAST to directly reduce atmospheric carbon dioxide. That is...
the answer is D.he conversion of restaurant grease to bio-diesel fuel for use by motorists.
D) the conversion of restaurant grease to bio-diesel fuel for use by motorists.
What is the term given to the genetic makeup of the organism?
During cellular respiration, energy is stored in the form of _______.
oxygen
water
ATP
food,
A minimum of 100 years of isolation is required for two populations to accumulate enough differences to be considered different species. true or false: a minimum of 100 years of isolation is required for two populations to accumulate enough differences to be considered different species.
a. True
b. False
which of the following separates layers of different density?
A)Incline
B)Halocline
C)Thermocline
D)pycnocline
Answer:pycnocline
Explanation:
I just had a question that was the opposite, instead of asking density and the answer is pycnocline, mine was asking pycnocline and the answer was density
The loss of a fetus before the 20th week of pregnancy is referred to as a(n) ___________. The medical term is spontaneous abortion, but the condition is not an abortion in the common definition of the term. A) toxemia. B) miscarriage. C) ectopic pregnancy. D) embryonic pregnancy.
the answer is mscarriage, b.
Where should the origin of jointed appendages be placed on the phylogenetic tree?
The ________ is the area of the brain where higher level thinking and self-regulation occur.
A journal whose articles are critically reviewed by experts in the field is called a:
A journal whose articles are critically reviewed by experts in the field is called a: peer reviewed journal.
Peer reviewed journals also known as scholarly journals, are journals that contain articles written by experts and are critically reviewed by many other experts in the field before the publication of the journal in order to ensure that the article is of good quality. When reviewing the journals, the reviewers do not know the article’s author, so that the article fails or succeeds based on its own value and not the owner’s reputation.
Mitosis, the process of cell division, is most important for an organism's what?
How do physical traits (adaptations) get passed on to offspring and inherited by a population?
Minerals are extracted from the Earth through various mining practices.
Mining is extraction of valuable minerals or other geological materials from the earth usually from an orebody, lode, vein, seam, reef or placer deposits. These deposits form a mineralized package that is of economic interest to the miner. Thus, the given statement is true.
What are the impacts of mining on the environment?Mining has a large impact on the environment because minerals are contained within the Earth. The long term effects of mining include acid drainage, erosion and dust emissions.
These processes has been based on the single principle: the difference in density between the components of the mixture. They are often used together to separate heterogeneous mixtures of two types as liquid + solid and immiscible liquids. In this case we have what mixture is the sediments of stones and the water that through the sieve will separate one from the other.
Therefore, Mining is extraction of valuable minerals or other geological materials from the earth usually from an orebody, lode, vein, seam, reef or placer deposits. These deposits form a mineralized package that is of economic interest to the miner. Thus, the given statement is true.
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Which structure provides a protective outer covering for bones and assists with fracture repair?
Complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phagocytize the organism. this phenomenon is termed ________. complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phagocytize the organism. this phenomenon is termed ________. agglutination chemotaxis opsonization diapedesis
Moss spores form inside capsules that break open and shoot spores into the environment. Which does not help carry these spores to new areas? water
rhizoids
animals
wind
The iron in breakfast cereal is absorbed more readily when consumed with a glass of vitamin c–rich orange juice.
Tetrodotoxin (ttx) is a neurotoxin that blocks voltage-gated na+ channels. what will happen in an organism that ingests ttx? all of the above in sufficient quantities, it will be fatal in the organism. action potentials will be impaired. neurotransmitter release will be impaired.
Tetrodotoxin (TTX) ingestion impedes action potential generation by blocking voltage-gated Na+ channels, likely resulting in neurotransmitter release impairment, muscle paralysis, and in high volumes, fatal outcomes due to respiratory failure.
Explanation:Effects of Tetrodotoxin (TTX) on NeurotransmissionTetrodotoxin (TTX) is a potent neurotoxin that can have a severe impact on an organism's nervous system by blocking voltage-gated Na+ channels. If an organism ingests TTX, it will interfere with the normal generation and propagation of action potentials, as those are reliant on the influx of sodium ions during the depolarization phase. In sufficient quantities, TTX can be fatal, causing impairment in the release of neurotransmitters and leading to paralysis, which includes the muscles involved in breathing, ultimately resulting in respiratory failure.
Neurotoxins like TTX demonstrate the critical roles that neurotransmitters and their receptors play in maintaining vital functions. Other toxins such as botulinum toxin, tetanus toxin, and d-tubocurarine have unique mechanisms but similarly disrupt neurotransmission, leading to paralysis or uncontrollable muscle contractions. For instance, tetanus toxin inhibits the release of inhibitory neurotransmitters like GABA, causing excessive muscle contractions and potentially death by asphyxiation.
Cases of toxin-induced neurological dysfunction underscore the importance of intact neurotransmission for overall health and survival. The study of these toxins has not only provided insights into neurological function but also has given rise to therapeutic applications, such as the use of botulinum toxin in small doses to treat certain medical conditions.
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Which of the following events encouraged Somali fishers to become modern-day pirates?
A. The Somali government's inability to protect its resources
B. Attack
s by international pirates on Somali fishers
C. The illegal entry of cargo ships into Somali waters
D. Legal fishing in Somali waters by international fishers
Answer:
A.
Explanation:
Legal fishing in Somali waters by international fishers encouraged Somali fishers to become modern-day pirates. Therefore, option (D) is correct.
Who were Somali fishers?Somali fishers are individuals who work in the fishing industry in Somalia, a country located in the Horn of Africa. Due to a lack of effective government control and the effects of overfishing by foreign fleets, Somali fishers have faced significant challenges in recent years. The depletion of fish stocks in Somali waters has made it difficult for local fishers to make a living, leading some to turn to piracy as a means of survival.
In addition, the activities of international ships, including illegal fishing and dumping of toxic waste, have further damaged the environment and the livelihoods of local fishers. The issue of Somali piracy has become a complex problem involving economic, environmental, and political factors.
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"what advantage do organisms that reproduce sexually have over organisms that reproduce asexually?"
What is the species name of a frog that is between 1.5 and 6 inches long, has warts on its skin, and has a triangular mark between its eyes? question 3 options: bufo boreas litoria caerulea pseudacris crucifer acris crepitans?
What is the species name of a frog that is between 1.5 and 6 inches long, has warts on its skin, and has a triangular mark between its eyes?
A.
Bufo boreas
B.
Acris crepitans
C.
Litoria caerulea
D.
Pseudacris crucifer
-->Acris Crepitans is the correct answer.
What part of the food chain is the Algae?
What kind of reaction forms a peptide bond? dehydration synthesis cellular respiration photosynthesis hydrolysis
dehydration synthesis
This type of farming practice helps preserve soil conservation by planting crops on the tops of hills.
Yesterday nadia consumed 250 grams of carbohydrate, 75 grams of protein, and 60 grams of fat. 57) what percentage of calories of her day's intake came from fat?
Daily values are calculated for the average person who consumes a total of
a. 200 calories a day
b. 1,000 calories a day
c. 2,000 calories a day
d. 10,000 calories a day
Daily values are calculated for the average person who consumes a total of c. 2,000 calories a day.
The image shows the daily values for a diet of 2000 Calorie. The intake of nutrients are calculated for a diet of the given daily value. This helps an individual judiciously consume food by looking at the chart of the nutrition printed on the carton or on the box in which it is packaged.
What determines the similarities in physical features among organisms
A.environmental conditions
B.predator prey relationships
C.chromosomes and genes
Continuous cell lines differ from primary cell lines in that question 12 options:
a.viruses can be grown in continuous cell lines.
b.continuous cell lines can be maintained through an indefinite number of generations.
c.continuous cell lines always have to be reisolated from animal tissues.
d.continuous cell lines are derived from primary cell lines.
e.continuous cell lines are from human embryos.
Continuous cell lines can be propagated indefinitely, while primary cell lines have a limited lifespan.
Option (b) is correct.
Continuous cell lines differ from primary cell lines in that they can be maintained and propagated through an indefinite number of generations, whereas primary cell lines have a limited lifespan and eventually undergo senescence or cell death.
Continuous cell lines are derived from primary cell lines through a process called immortalization, where they acquire the ability to divide indefinitely. These cell lines are often used in research laboratories and biotechnology applications because of their ability to provide a continuous and consistent source of cells.
Unlike primary cell lines, continuous cell lines do not need to be reisolated from animal tissues repeatedly. They can be cultured in the laboratory under specific conditions, and they are widely used for studying cell biology, drug testing, vaccine development, and viral propagation, among other applications.
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Which animal product is least efficient at converting feed consumed into the final product? milk beef chicken pork eggs?
A male client is taking procrit. he requests changing his medication from the im to the po route. the nurse's best response is: