Explanation:
cientific hypothesis
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scientific hypothesis, an idea that proposes a tentative explanation about a phenomenon or a narrow set of phenomena observed in the natural world. The two primary features of a scientific hypothesis are falsifiability and testability, which are reflected in an “If…then” statement summarizing the idea and in the ability to be supported or refuted through observation and experimentation. The notion of the scientific hypothesis as both falsifiable and testable was advanced in the mid-20th century by Austrian-born British philosopher Karl Popper.
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Are their any multicellular chemoautotrophs? If so, describe them. If not, why?
It is not possible to have a multicellular chemoautotrophs.
What are chemoautotrophs?The term chemoautotrophs refers to those organisms that use the energy from the sun to convert inorganic elements into compounds that are useful in the soil. There are several kinds of chemoautotrophs such as nitrosomonas and nitrobacter.
When we talk about multicellular organisms we are talking about the organisms that have more than one cell. The unicellular organisms are the organisms that have only one cell and we know that bacteria and certain kinds of fungi possesses only one cell.
Since we know that the chemoautotrophs are bacteria and bacteria are singe celled organisms, it is not possible to have a multicellular chemoautotrophs.
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How do density dependent and density independent factors differ in there effects on population growth. Give some examples of each. Please help
The difference between density dependent and density independent factors in terms of their effects on population growth and common examples are described below.
What is density dependent and independent factors?Limiting factors are conditions that limit the growth or abundance of a population of organisms in an ecosystem.
There are two types of limiting factors that can affect population growth and they are as follows:
Density dependent factorDensity independent factorDensity dependent factors are factors that regulate the population growth by mechanisms controlled by the size of the population while density independent factors affect population growth irrespective of size of the population.
Density dependent factors limit the growth of a population as the population increases while density independent factors limit the population growth irrespective of whether there is an increase in population or not.
Examples of density dependent factors are as follows:
PredationCompetitionDisease and parasitesWaste accumulationExamples of density independent factors are as follows:
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i need help!!!!!!!!!!
BRAINLEST GOES TO WHOEVER ANSWERS CORRECTLY
Answer: 3 Oxygen atoms
Explanation:
The subscript next to "O" is 3. Therefore 3 oxygen atoms. See attached
when do mammals and dinosaurs appear in the rock sequence? Label this point appearance of mammals and dinosaurs
In the Triassic period, mammals and dinosaurs appear in the rock sequence.
During which period did mammals first appear?The first mammal appear in the fossil record during the late Triassic period, which is about 225 million years ago. The Triassic period is also known as the first period of the Mesozoic era. This period started from 251.9 to 201.3 million years ago. This era is popularly known as the “Age of Reptiles” because reptiles and dinosaurs were the dominant land animals at that time and they are present in large population due to good environmental conditions and large availability of food resources. We know that dinosaur extinct due to unavailability of food and bad environment.
So we can conclude that In the Triassic period, mammals and dinosaurs appear in the rock sequence.
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4. Carbon dating would work best on which of the following items?
Oan animal bone from 100,000 years ago
a stone tool from 2000 years ago
O a wood tool from 100 years ago
a neanderthal bone from 40,000 years ago
The carbon dating technique would only be best for a Neanderthal bone from 40,000 years ago.
What is carbon dating?
Organisms are known to exchange [tex]^{14} C[/tex] with their environment while they are alive. There are two types of carbon isotopes which are carbon 12 and carbon -14.
The carbon -14 is known to be radioactive. As such, the decay of the carbon - 14 isotope could be used to obtain the age of the sample of the radioactive sample.
Again, it is known that the limit of the accuracy of the carbon-14 system of dating technique lies around 50 000–60 000 years. It then follows that the carbon dating technique would only be best for a Neanderthal bone from 40,000 years ago.
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Which material has the highest thermal conductivity? Which material has the highest electrical conductivity? Explain why thermal and electrical conductivity is so high with this material
(copper has the most thermal conductivity with 400. and copper once again has the most electrical conductivity with 5.9x107S/m)
Conductivity is the measure of the ease at which an electric charge or heat can pass through a material. A conductor is a material which gives very little resistance to the flow of an electric current or thermal energy.
What is thermal conductivity examples?The physical property how much a body can be sized for thermal conductivity. Good thermal conductors have a high value of thermal conductivity, while insulators have low thermal conductivity. Another factor that depends on thermal conductivity is the thermal sensation.
Thermal conduction, also called thermal diffusion, is a type of heat propagation that takes place in a material medium due to the agitation of molecules. As the temperature of a solid body increases (either through heating or contact with another), the kinetic energy also increases.
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In 1650, an individual calculated that earth was about 6,000 years old. How did the discovery of fossils in rock layers around the globe change scientists' understanding of earth's age?
A.They discovered that earth was significantly younger than previously thought.
B.They could better estimate the relative age of rocks based on fossils.
C. The fossils allowed scientists to precisely determine the absolute age of rock.
D. They determined that the same organisms had been on earth for a long time.
The discovery of fossils in rock layers meant that they could better estimate the relative age of rocks based on fossils. Option B
What are fossils?The term fossils is used to describe the organisms that have lived and died whose remains could be found in rock formations around the work. We know that intricate records of the organism that have existed on the earth over time could be found in rocks.
The ages of these organisms play a key role in the determination of the age of the rock and ultimately the age of the earth. The earth has been found to be much older than the 6000 years estimate given in the question.
As such, the discovery of fossils in rock layers around the globe helped scientists to better estimate the relative age of rocks based on fossils.
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In TV shows and movies, the word mutant refers to characters born with abilities unusual for humans. What do you think scientists mean when they talk about a genetic mutation?
Do you think all genetic mutations are harmful? Explain your answer.
Answer:
A gene variant is a permanent change in the DNA sequence that makes up a gene. This type of genetic change used to be known as a gene mutation,but not all genetic mutations are harmful .The majority of mutations have neither negative nor positive effects on the human or the organism itself.
Explanation: (In the answer as well)
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Which statement is true of all scientific laws?
OA. They were established by scientists hundreds of years ago.
OB. They are factual explanations that cannot be questioned.
C. They describe nature through the past, present, and future.
OD. They must be based on mathematical formulas to be valid.
C
They describe nature through the past , and future
Which claim is most likely based on pseudoscience?
OA. The growth of plants is affected by the availability of light and
water.
B. Gardening is good for the soul because plants represent the
beauty of nature.
OC. Plants are often used during certain religious ceremonies.
OD. Seeds should be planted during specific moon cycles to achieve
their potential.
Answer:
D. Seeds should be planted during specific moon their cycle to achieve their potential.
How do chromosomes line up differently in meiosis compared to mitosis? A. They line up in a straight line of 92 chromosomes. B. They lineap with their duplicated homologous pair to form a tetrad. C. They line up with the duplicated chromosome one on top of the other. D. They line up with the chromosome from the same parent.
Is the C. They line up with the duplicated chromosome one on top of the other
Chromosomes line up differently in meiosis compared to mitosis as they line up with the duplicated chromosome one on top of the other. Therefore, the correct option is C.
During mitosis the chromosomes align differently than during meiosis. Homologous chromosomes pair up and join during the first stage of meiosis, known as prophase I. Two sister chromatids, which are identical copies made by DNA replication, make up each homologous chromosome. A quadrivalent or bivalent is the name of the structure formed by these paired homologous chromosomes.
Therefore, the correct option is C.
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What types of measurements can Susie make on the plants to determine how they did in different types of light
The height of the plant under different types of light should be measured.
What is the height of the plant?In an experiment, we seek to determine how a cause leads to an effect. In this case, Susie is trying to know the effect of different types of light on the growth of a plant.
It is true that the easiest way to measure the growth of the plant is to look at the height of the plant. This shows us the extent to which the plant grows.
Let is recall that in this case, the height of the plant is the dependent variable while the kind of light is the independent variable. As the kind of light is changed, the height of the plant which is an indicator of the growth of the plant changes also and this is the crux of what Sarah is studying.
Thus, the type of measurement that Susie should make on the plants to determine how they did in different types of light is to measure the height of the plant under the different types of light.
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try to classify the following stem growth forms.
dentify the role of the hypothesis in science
Answer:
The hypothesis is your prediction of an experiment that can disprove or corroborate the findings. It is written before the experiment and is the theory of the observation.
Explanation:
Nelly was reading about
The diatoms organism is the subject of the article, and they are utilized as insecticides since they are abrasive against pests.
The correct option is B.
What are diatoms?Diatoms are a type of photosynthesising algae that can be found practically wherever that is moist, including soils, freshwater bodies of water, and the ocean. They contain a siliceous skeleton called a frustule. Diatoms are categorized as eukaryotes, which distinguish them from prokaryotes like bacteria and archaea by having a nuclear envelope-bound cell nucleus.
What kind of diatom is an example of?The following are some prominent diatoms: A mucilaginous layer covers the elongated, elliptical pinnular diatom. The genus is a member of the order Naviculales, class Bacillariophyceae, and family Pinnulariaceae.
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The complete question is-
Nelly was reading about ecological pesticides. She found a website that said that skeletons of some organisms settle as sediments in the ocean. They are then used as pesticides because they are abrasive against pests. Which organism is the article discussing?
a-dinoflagellates
b-diatoms
c-green algae
d-euglenoids
e-amoeba
What would be the result if you had a hypotonic solution with a cell in it?
O Equilibrium would be met by salt rushing out of the cell.
O Equilibrium would be met by salt rushing into the cell.
O Equilibrium would be met by water rushing out of the cell.
O Equilibrium would be met by water rushing into and out of the cell evenly.
O Equilibrium would be met by salt rushing into and out of the cell evenly.
O Equilibrium would be met by water rushing into the cell.
Answer:
A. The water rushes out of the cell
Which cycle mostly takes place underground
Answer:
Nitrogen cycle
Hope this helps :)
Explanation:
Lots of the nitrogen on earth is underground, in plants and soil.
What causes the moon to have different phases?
Explain why the researcher chose to use the quadrat method rather than
mark and recapture to sample the coral population.
The researcher chose to use the quadrat method rather than mark and recapture to sample the coral population because corals are sessile, which means they are immobile. For a sample that exhibits mobility, the mark recapture approach is employed. i.e., being movable.
Quadrat Method- In ecology, geography, and biology, a quadrat is a frame that is typically square and is used to isolate the standard unit of space for the study of an item's distribution over a vast region.
Mark Recapture Technique- When it is impracticable to count every person in a population, the Mark-Recapture approach is employed to estimate its size.
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This group of animals is primarily aquatic and has mandibles and two pairs of antennae. Which group is this?
A.
insects
B.
crustaceans
C.
arachnids
QUICKKK PLSS The development of cell theory can be attributed to ___________.
A the sole use of a microscope in labs
B observations and conclusions of many scientists
C English scientist, Robert Hooke
D Dutch scientist, Anton Van Leeuwenhoek
A black cat and a white cat have four black kittens in the F1 generation. In the F2
generation, there are three black kittens and one white kitten. Explain how the Fz
generation proves that genetic information passes unchanged
from one generation to the
next,
even when a specific trait is not exhibited.
The white cat is the recessive allele w, while the black cat is the dominant allele B. However, in the f1 generation, the dominant allele concealed the recessive features, but they are heterologous dominant, i.e. BBww in f2 second filial generation: Bw x Bw.
There are three black kittens and one white kitten when f2 second filial generation offspring are crosslets. Consider the genotype of white cat WW and black cat as BB in the first generation as it's given in question all the offspring of f1 generation are black giving a hint that black is dominant over white.
Now genotype of f1 offspring is wB now in the second filial generation where 2 offspring of f1 crossed the resultant offspring is 3 black kittens and 1 white kitten. second filial generation is the second filial generation of the offspring produced by inbreeding F1 people, whereas F1 generation refers to the first filial generation of the offspring from the parents. hence, the results are BB, Bw, Bw, and ww.
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Which would not be considered an organism
Biodiversity is the assortment, or variety, of living things in an ecosystem
Explanation:
Biodiversity is the variety of life forms in specific ecosystem but also biodiversity is the alignment between the them.
Which statement is true? DNA forms a double helix; RNA consists of a single strand. DNA forms a single strand; RNA consists of a double helix. RNA forms a double strand; DNA consists of a single helix. RNA forms a double strand; DNA consists of a double helix
RNA forms a double strand; DNA consists of a single helix. RNA forms a double strand -TRUE
Perhaps the most significant molecules in cell biology are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), which store and read the genetic information that is the basis of all life. Both are linear polymers made up of sugars, phosphates, and bases, but they differ in a few significant ways.
These differences allow the two molecules to cooperate and perform their fundamental functions. Here, we examine 5 significant distinctions between DNA and RNA. All genetic information is encoded in DNA, which also serves as the building block for all biological life.
And only in the near future. In the long run, DNA serves as a storage medium, a biological flash drive that enables the transmission of the genetic code from one generation to the next.
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150-word explanation of how different types of dietary fat affect our cardiovascular health.
Dietary fats are rich in lipid composition. They lower the good cholesterol and contribute to bad cholesterol in the blood stream. This narrows the lumen of the arteries and hence is responsible for various heart ailments.
What are cardiovascular diseases?Cardiovascular diseases are the heart related disorders in which the functioning of the heart is affected.
Cardiovascular diseases are mainly the outcome of poor heart heath due to poor dietary habits, lack of exercise and stress. High consumption of fatty food also contributes to cardiovascular diseases.
Hypertension, Angina, coronary artery diseases, Atherosclerosis are some of the cardiovascular diseases.
Thus, cardiovascular diseases require a timely management for healthy life.
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The endocrine system works closely with the _________
system to bring about homeostasis in the body.
O respiratory
O cardiovascular
O immune
O nervous
similarities between ecosystem approach and ecosystem management
Explanation:
balances both human and nature's needs
protect and mange the environment
protecting the earth and its species from potential harm
The similarities between the ecosystem approach and ecosystem management are:
Balances both human and nature's needsprotect and manage the environmentprotecting the earth and its species from potential harmWhat is an ecosystem approach?The ecosystem approach is the term by which the management of the animals and plants and other living resources. The conservation or property use of these resources comes under an ecological approach.
The management of ecological services and biological resources is managed under this management system. This system also sees what extent these resources are using.
Thus, the similarities between them are:
Maintain and manage the environment.Protects the earth and its species from potential harm.Balances human and natural requirements.To learn more about the ecosystem approach, refer to the link:
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Explain the classifications of minerals by giving examples
Answer: Mineral is a naturally occuring substance, having definite chemical composition. Its outer layer is rigid and hard. Classification of Minerals. 1. Metallic minerals: Those minerals from which we obtain metals like iron, gold, copper, silver, aluminium etc. They are of two types: (a) Ferrous: iron ore, manganese etc. (b) Non Ferrous: does not contain iron but may contain some other metals like- gold, silver, copper etc. 2. Non-metallic: they do not contain metals like – coal, mica, sulphur, potash etcRead more on Sarthaks.com -
Explanation: