He observed the phases of Venus
Galileo knew about and had accepted Copernicus's heliocentric (Sun-centered) theory. It was Galileo's observations of Venus that proved the theory. Using his telescope, Galileo found that Venus went through phases, just like our Moon.
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why is ice at 273 k more effective in cooling than water at the same temperature?
Answer:
it does not have any hidden heat.
Explanation:
Ice at 273K or 0°C is more efficient in cooling as it does not have any hidden heat. Water at the same temperature has hidden heat, banned latent heat of fusion, which is used to convert water into ice. Thus, ice at 273 K is more effective in cooling
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Ice at 273K is more effective in cooling than water at the same temperature as ice absorbs more heat to overcome the latent heat of fusion, as a result, provides the cooling effect.
What is latent heat?
Latent heat of fusion is the energy that must be provided to the solid matter so that there is a change triggered in the physical state of the matter, and as a result, leads to the formation of the liquid.
Ice at 273 K has a cooling effect as there is no hidden heat and latent heat, unlike the water that has hidden heat that makes them less cool than the ice at the same temperature.
Therefore, the ice exhibits a cooling effect at 273 K.
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which factor most likey results in the loss of genetic variation from small populations?
A migration
B mutation
C genetic drift
D genetic recommendation
Answer:
C genetic drift
Explanation:
variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.
What are the two chemical components of chromosomes?.
Answer:
Explanation:
DNA & Protein are the two chemical components of chromosomes that candidate for genetic material
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cool, very thin, outermost layer, under the ocean, usually made of out basalt: 1. oceanic crust
cool, very thin, outermost layer of the earth includes continents and ocean floor: 4. crust
the layer beneath the earth's crust. solid, hot rock that flows slowly: 5. mantle
earth layers organized by what the layers are made of : 1. compositional layers
cool very thin, outer most layer, on continents usually made of granite: 3. continental crust
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Identify the synthetic fibre which resembles wool.
A. Rayon
B. Terylene
C. Nylon
D. Acrylic
Answer:
Acrylic.
Explanation:
Acrylic is the synthetic fibre which resemble silk and wool. It is also known as artificial wool or synthetic wool.
PLEASE VERY SIMPLE QUESTION: The graph above shows the effect of sew biological oxygen demand (BOD) and dissolved oxygen (DO) in a flowing stream. The smallest fish populations will most likely be found at point...
Answer:
A
Explanation:
closer to the sewage spill- less fish there will be because sewage is poisonous and at A the BOD is relatively high
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Why is it difficult to male level 4 organs in a lab?
Answer:
By providing an example using one organ for each of the four levels of complexity, we have the following:First level organ: Skin; this is because it takes up a few cells. Second level organ: Windpipes; this is because they have more complex shapes with multiple cells. Third level organ: Stomach; this is because the stomach has to act on demand instead of a flow. Fourth level organ; Heart. The reason it is difficult to make level four organs in a lab is that it has a complicated architecture with several cells, blood vessels and tiny capillaries included. So far, scientists are yet to fully develop solutions for the level four organs and hence, difficult to create in a lab.
Explanation:
How has the global warming affected the ecosystem
Answer:
disorder in ecosystems
Explanation:
The ecosystems are having a disorder due to the too rapid change of the environment since many organisms cannot adapt quickly to the new climate. An example of this is the Arctic, due to its warming too quickly, causing polar bears to migrate south and mix with grizzly bears, changing the ecosystem.
What would most likely happen if the power lines in a petroleum power plant were broken? the petroleum would not burn. steam would not be produced. customers would not receive electricity. energy would not be converted.
The answer is Customers would not receive electricity as the power lines in a petroleum power plant were broken.
How do petroleum power plants produce electricity?
Fossil fuel power plants burn coal or oil to create heat which is in turn used to generate steam to drive turbines that generate electricity.
Thus, Customers would not receive electricity.
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What are the issues / concern of cell research list five
Answer:
involves destruction of human identity
that's the answer
In an example of pleiotropic genes, the flower color gene studied by Mendel affected ________ trait(s).
Answer:
two traits ,
Explanation:
In an example of pleiotropic genes, the flower color gene studied by Mendel affected a single trait.
Pleiotropy refers to a phenomenon where a single gene influences multiple, seemingly unrelated traits or characteristics in an organism. However, in this specific case of Mendel's flower color gene, it affected only one trait, which is the color of the flower.
Genes are the basic factors of inheritance. They are found in the DNA of all living organisms. They are responsible for transmitting genetic information from one generation to the next and play a crucial role in determining an organism's traits and characteristics.
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Assuming that the population was in hardy-weinberg equilibrium for the g locus, what percentage of moths in the natural population was white in 1962 ?.
The percentage of moths in the natural population that was white in 1962 is : 4%
What is Hardy-weinberg equilibrium ?Hardy-weinberg equilibrium states that the sum total of all the genes of an individual in a population is constant when the disturbing factors such as genetic drift does not occur
p² + q² + 2pq = 1
Determine the percentage of moths in 1962Applying the equation below
p² + q² + 2pq = 1
p = frequency of dominant allele
q = frequency of recessive allele
q² = frequency of h0m0zygous recessive genotype
p² = frequency of h0m0zygous dominant genotype
From the graph
Frequency of G allele ( i.e p ) = 0.8
percentage of white moths = q²
Note : p + q = 1 ---- ( 1 )
Insert value into equation ( 1 )
0.8 + q = 1
therefore ; q = 0.2
Hence the percentage of white moths = ( 0.2 )² = 0.04
= 4%
Hence we can conclude that The percentage of moths in the natural population that was white in 1962 is : 4%
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The largest amount of DNA in plant cell is contained in
Answer:
In plant cells, most DNA is located in the nucleus, although chloroplasts and mitochondria also contain part of the genetic material
Match the image with its best description
images are not so clear . I answered according to what I probably felt it can be acc to attachment.
Your parents have had a leaky pipe underground in your
backyard for years. You have two trees in the backyard. One is located closer to the leaky pipe while the other tree is farther away. What will be the response of the tree that is further away?
Stimulus:
Tropism:
Response:
Hydrotropism is the root motion toward the water source. In the example, Stimulus: Water. Tropism: Hydrotropism. Response: Roots growth toward the water leak.
What is Tropism?In botanic tropism refers to the biological response of the plant during its development to an external stimulus. These responses are usually noticed as plant motion, forward to or away from the stimulus source.
Stimuli can be good or bad for the plant, and depending on this, the plant will try to get closer or farther. According to this, Tropism can be either positive or negative.
Positive tropism ⇒ the plant moves forward to the stimuli sourceNegative tropism ⇒ The plant moves away from the stimuli source
According to the stimuli, there are different kinds of tropism,
Tropism Stimuli
Phototropism LightGeotropism GravityHydrotropism WaterTigmotropism Solid objectChemotropism Chemical Airtropism AirIn the exposed example,
Stimulus ⇒ Water from the leaky pipeTropism ⇒ Hydrotropism Response ⇒ The tree roots grow forward to the leak looking forwater source
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The fundamental problem of not having enough resources to meet unlimited desires
is called…
A. Underutilization
B. Factors of Production
C. Scarcity
D.Shortage
Answer:
c. Scarcity is the right answer
In a DNA molecule, ______ bonds form between nitrogenous bases, such that A (adenine) pairs with its complement ______, and G (guanine) pairs with its complement ______.
In a DNA molecule, hydrogen bonds form between nitrogenous bases, such that A (adenine) pairs with its complement T (thymine), and G (guanine) pairs with its complement C (cytosine).
In the above Hydrogen bond, A (adenine) pairs with T ( thymine) while G (guanine) pairs with C (cytosine).
What is DNA molecule?DNA molecule is a type of nucleic acid that is found in living cells. DNA is an acronym for deoxyribonucleic acid. The chromosomes is contained within DNA molecule, it carries hereditary information which can be passed from parent to offsprings.
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Which of the following is a typical product of nuclear fission? a. oxygen b. carbon dioxide c. radiation d. water please select the best answer from the choices provided a b c d
The answer will be :
C. radiation
Answer:
C
Explanation:
Trust thr process Edge 2022
What does the Theory of Evolution state and what are the 4 evidences for it? *
Answer:
Mark me brainliest please I really need itExplanation:
In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species are related and gradually chamge over time.Darwin's theory consisted of two main points; 1) diverse groups of animals evolve from one or a few common ancestors; 2) the mechanism by which this evolution takes place is natural selection.Evidence that supports the theory of evolution are fossils, embryological studies, anatomical and morphological characteristics (homologous organs, analogous organs, vestigial organs), molecular biology (comparing DNA sequences).The release of neurotransmitter from the presynaptic cell is an example of:
Exocytosis is highly specialized in secretory cells and neurons, is highly regulated, and constitutes the main cellular mechanism for neurotransmitter secretion.
What is exocytosis?It involves the fusion of the vesicular membrane to the plasma membrane, in a calcium-dependent manner that releases molecules that perform specific functions in the body.
Neurotransmitter exocytosis is an essential part of presynaptic transmission and, by extension, of the functioning of the nervous system.
Therefore, we can conclude that exocytosis is highly specialized in secretory cells and neurons, is highly regulated, and constitutes the main cellular mechanism for neurotransmitter secretion.
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The release of neurotransmitters from the presynaptic cell is an example of exocytosis.
What is exocytosis?Neurotransmitter is saved interior small sacs known as synaptic vesicles and is launched into the synaptic cleft of the synapse while a vesicle fuses with the cell membrane.
When a movement capability depolarizes the presynaptic plasma membrane, Ca2+-channels open, and Ca2+ flows into the nerve terminal to cause the exocytosis of synaptic vesicles, thereby freeing their neurotransmitters into the synaptic cleft.
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1.Which of the following allows the EPA to regulate water on board aircraft to ensure that the public is not exposed to high levels of bacteria? a)Federal Aviation Administration b)clean water act c)food and drug administration d)safe drinking water act
2.which of the following specifically regulates discharges of pollutants into U.S. waters and regulates the quality standards for surface waters? A)clean water act b)safe drinking water Act c)Environmental protection agency d)national environmental policy act
Answer:
Safe Drinking Water Act.
Explanation:
1. The following allows the EPA to regulate water on board aircraft to ensure that the public is not exposed to high levels of bacteria is safe drinking water act and 2. clean water act.
What is the work of clean water act?Under the CWA, the phrase “discharge of a pollutant” is described as “any addition of any pollutant to navigable waters from any factor source,” and “any addition of any pollutant to the waters of the contiguous area or the sea from any factor source.” In different words, a discharge of a pollutant takes place whilst a pollutant is discharged.
The Clean Water Act (CWA) establishes the fundamental shape for regulating discharges of pollution into the waters of the USA and regulating high-satisfactory requirements for floor waters.The US Environmental Protection Agency (EPA) Safe Drinking Water Act (SDWA) is a federal rules that hooked up the fundamental shape for the oversight of the requirements and high-satisfactory of consuming water.Read more about the EPA water problems:
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_________________________ are the most reflective substances on the surface of Earth.
Answer:
The answer is snow
The answer is Gold. Gold has the best reflectivity in the infrared spectrum, and has high resistance to oxidation and corrosion. It is used as reflective material on infrared instruments. Silver has the best initial front-surface reflectivity in the visible spectrum.
The cold adapted coniferous trees that dominate here have the following key adaptations: (select all that apply) question 7 options: conical shape to helps the snow to distribute more evenly across the tree and also to fall to the ground and prevent branches from breaking pear shape to helps the snow to distribute more evenly across the tree and also to fall to the ground and prevent branches from breaking thin needles have less surface area and waxy cuticles to avoid water loss in the dry winds and in winter when most available water is frozen thick needles have less surface area and waxy cuticles to avoid water loss in the dry winds and in winter when most available water is frozen very shallow roots compared to other trees like we have here in ohio. very deep roots compared to other trees like we have here in ohio.
Conical shape helps the snow to distribute more evenly across the tree and also to fall the ground and prevent branches from breaking pear shape to helps the snow to distribute more evenly across the tree
and ,also to fall to the ground and prevent branches from breaking thin needles have less surface area.
How do conifers adapt to the cold?They have several adaptations that help them grow in colder, drier conditions. Their needles are heavily cutinized. Their small surface area helps reduce evaporative water loss.
Thus, thee are the correct statement.
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The region of the stomach that empties into the duodenum is the.
Answer:
The pylorus
Explanation:
is the part of the stomach that connects to the small intestine. This region includes the pyloric sphincter, which is a thick ring of muscle that acts as a valve to control the emptying of stomach contents (chyme) into the duodenum (first part of the small intestine).
Answer:
The pylorus is the part of the stomach that connects to the small intestine. This region includes the pyloric sphincter, which is a thick ring of muscle that acts as a valve to control the emptying of stomach contents (chyme) into the duodenum (first part of the small intestine).
Explanation:
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Figure 1 represents part of a process that occurs in eukaryotic cells. There are untranslated regions (utr) in this sequence
The figure is a representation of the processing of raw mRNA generated from transcription, otherwise known as pre-mRNA, to a standardized mRNA that can be translated.
Pre-mRNA processingAfter transcription, the pre-mRNA produced needs to be processed and refined in order to be ready for translation.
The non-coding sequence, otherwise known as introns, are spliced out of the pre-mRNA and the coding sequence, the exons, are joined back together.
The whole process is mediated by different enzymes.
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The figure is a illustration of the processing of uncooked mRNA generated from transcription, in any other case called pre-mRNA, to a standardized mRNA that may be translated.
What is Pre-mRNA processing ?After transcription, the pre-mRNA produced desires to be processed and delicate with a purpose to be geared up for translation.
The non-coding sequence, in any other case called introns, are spliced out of the pre-mRNA and the coding sequence, the exons, are joined again together.
The entire system is mediated through one of a kind enzymes.
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Research and list the costs and benefits of using uranium as an energy resource. do the
benefits outweigh the costs for the united states?
Which of the following describes safeguards used in nuclear power plants to protect the environment? I. Radioactive sections of the plant are cleaned every week. II. Cooling the reactor prevents an explosion and leak of radiation. III. A mixture of different forms of uranium prevents explosions.
Answer: Cooling the reactor prevents an explsion and leak of radiation
Explanation:
Answer:
It's one and two
Explanation:
I took the test
Choose all characteristics of prostaglandins.
a) They are usually present in large amounts.
b) They are not stored in cells and are synthesized just before they are released.
c) They are rapidly inactivated after their release.
d) They travel in the bloodstream to their target cells.
e) They are paracrine substances.
Prostaglandins are not stored in cells and are synthesized just before they are released, rapidly inactivated after their release and they are paracrine substances (Options b, c and e).
Whta are prostaglandins?Prostaglandins are chemical substances that act as hormones by affecting surrounding cells in a tissue.
These substances (prostaglandins) are not secreted by specific glandular organs as other hormones.
Prostaglandins are substances that have fundamental functions for the normal functioning of the body.
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How are tumor cells different from normal cells?
O A. Mitosis does not happen in tumor cells.
O B. Cell division is not regulated in tumor cells.
O C. Tumor cells do not contain chromosomes.
O D. Tumor cells have a cell wall instead of a membrane.
Answer:
B. Cell division is not regulated in tumor cells.
Explanation:
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At which point on a cladogram do two species share an ancestor?.
Answer:
The node
Explanation:
Each branch point on the cladogram represents where species split off into new ones. The node represents the last point at which 2 new species shared a common ancestor.