Answer:
The steps that can be seen in this story are observation and the questioning phase, which can also be called elaboration of the problem.
Explanation:
The scientific method is a set of phases that are able to guide researchers to the creation of scientific knowledge, through an experiment. This method is essential for conducting scientific research, allowing an experiment to be managed in a way that promotes answers to scientists' questions. The scientific method presents the phases called observation, questioning (or elaboration of the problem), elaboration of hypotheses, experimentation, analysis of the results and conclusion.
In the story shown in the question above, we can see the phases called observation and questioning. The observation takes place the moment Fleming noticed a fungus capable of growing on colonies of bacteria that cause throat infections, killing them. This observation made him enter the questioning phase, when he wondered if the fungus was able to prevent the growth of these bacteria.
The TAS2R38 gene encodes a receptor protein that influences the ability to taste bitterness. The gene has two alleles: a dominant, wild-type allele that enables an individual (taster) to taste bitterness and a recessive, mutant allele that interferes with the ability of an individual (nontaster) to taste bitterness. In a sample of 2,400 people, 1,482 were found to have the dominant (taster) phenotype. Assuming that the population is in Hardy-Weinberg equilibrium, approximately how many individuals in the sample are expected to be heterozygous for TAS2R38
Answer:
The correct answer is - 1133.
Explanation:
According to H-W equilibrium;
p2 +2pq + q2 = 1 ........... eq.1 and
(p+q)2 = 1 ..............eq.2
Here q = frequency of the recessive allele,
and p = frequency of the dominant allele in the population
The genotype of p2 + 2pq shows the dominant(taster) phenotype.
The genotype of q2 shows the recessive(non-taster) phenotype.
q^2 = (2400 - 1482)/2400
= 0.3825
= 0.618
using eq. 2 we get p= 1-q
=0.382
2pq = No. of heterozygotes/2400
No. of heterozygotes = 1133.1648
Describe what happens to DNA during the S stage of interphase.
True or False - Deoxygenated blood is blue
Answer:
True beoxygenated blood is blue
Which of the following is an example of genomic imprinting in humans? Which of the following is an example of genomic imprinting in humans? A random pattern of autosomal allele inactivation is observed. In some allele pairs, only the paternal sourced allele is expressed, and in others, only the maternal sourced allele is expressed. The maternal and paternal alleles of a gene pair are both expressed. Human males have only one Y-chromosome and one X-chromosome. One of the two X-chromosomes in females is randomly expressed and the other is repressed.
Answer:
In some allele pairs, only the paternal sourced allele is expressed, and in others, only the maternal sourced allele is expressed.
Explanation:
Genomic imprinting is an epigenetic phenomenon where alleles are differentially expressed depending on their parental origin (for example, paternally expressed when it is inherited from the father). Genomic imprinting is controlled by epigenetic modifications (for example, DNA methylation, histone acetylation, etc) which works together to preferentially activate the expression of the allele inherited from one parent and simultaneously silence or “imprint” the expression of the allele inherited from the other parent. In humans, an example of genomic imprinting is the case of the insulin-like growth factor 2 (Igf2) gene, which is maternally imprinted (repressed), thereby this gene is only expressed from the paternal allele.
In the logistic growth model, as a population approaches the carrying capacity, what happens to its growth rate?
A
becomes exponential
B
doubles
C
increases
D
slows to zero
In the logistic growth model, as a population approaches the carrying capacity, the growth rate of the population will slow down to zero. Thus, the correct option is D.
What is Logistic growth model?The logistic growth model is a parameter which represents the rate at which the population would grow if it were unencumbered by the environmental degradation. A second parameter, that is K, represents the carrying capacity of the system of species which are being studied.
In logistic growth, a population's per capita growth rate gets smaller and smaller as the population size when it approaches a maximum imposed by the limited resources in the environment, known as the carrying capacity (K). Exponential growth model produces a J-shaped curve, while logistic growth produces an S-shaped curve.
Therefore, the correct option is D.
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2.The horned lizard is often called a horned toad because of its short, fat body and small tail.
When this lizard finds a coyote, it will spray blood from its eyes at the coyote. Then the lizard will run a short distance and stay very still to blend into the background.
Why does the horned lizard do this?Lector inmersivo
(1 Punto)
Horned lizards do this to play with the coyote.
Horned lizards do this to attract other horned lizards.
Horned lizards do this to catch and eat the coyote.
Horned lizards do this to escape from the coyote.
why is the air temperature in the rain forest of Peru so warm?
Answer:
Because Peru is located between the equator and Tropic of Capricorn. Since it is in the tropics, one might expect Peru to be a country of extreme heat and heavy vegetation.
Explanation:
Which of the following are similarities between meiosis and mitosis?
Check all that apply.
2 points
There are two rounds of division
DNA gets replicated during S stage of interphase
prophase, metaphase, anaphase, and telophase occur in that order
four haploid daughter cells are produced
Answer: DNA gets replicated during S stage of interphase
prophase, metaphase, anaphase, and telophase occur in that order
four haploid daughter cells are produced
Explanation:
PLEASE HELP FAST!!!!
As humans continued to burn more and more oil and natural resources what has happened
to the world's carbon dioxide output?
Answer:
Global warming 100% one of them. And Air pollution.
Explanation:
Good luck
Which statement best explains the economic drawback of using geothermal energy over energy generated by fossil fuels?
More cost-effective over time
Higher installation costs than fossil fuel plants
More energy plant locations available
Less pollution than fossil fuel plants
Answer:
More cost-effective over time
Answer:
Could it be the higher installation costs than fossil fuel plants????
Explanation:
The wings of butterflies and birds are ----------- structures because, although they are used for the same purpose (flight) they have very different structural compositions. Bird wings are made of bones and feathers while butterfly wings are made from chitin and are part of the insect’s exoskeleton.
A) homologous
B) analogous
C) vestigial
Bird wings are made of bones and feathers while butterfly wings are made from chitin and are part of the insect’s exoskeleton.
B. They are analogous structures because they share the same function, but not fully the same structural characteristics.
What are examples of analogous?Analogous Structures are:
Bird, Insect and Bat Wings. Duck and Platypus Bills.Thus, option "B" is correct answer.
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Describe DNA synthesis in detail
Answer:
DNA synthesis is the biological process by which a deoxyribonucleic acid (DNA) molecule is created. In the cell, each of the two strands of the DNA molecule acts as a template for the synthesis of a complementary strand.
Answer:
The discovery of the double-helical nature of DNA by Watson & Crick explained how genetic information could be duplicated and passed on to succeeding generations. The strands of the double helix can separate and serve as templates for the synthesis of daughter strands. In conservative replication the two daughter strands would go to one daughter cell and the two parental strands would go to the other daughter cell. In semiconservative replication one parental and one daughter strand would go to each of the daughter cells.
Through experimentation it was determined that DNA replicates via a semiconservative mechanism. There are three possible mechanisms that can explain DNA's semiconservative replication.
(a) DNA synthesis starts at a specific place on a chromosome called an origin. In the first mechanism one daughter strand is initiated at an origin on one parental strand and the second is initiated at another origin on the opposite parental strand. Thus only one strand grows from each origin. Some viruses use this type of mechanism.
(b) In the second mechanism replication of both strands is initiated at one origin. The site at which the two strands are replicated is called the replication fork. Since the fork moves in one direction from the origin this type of replication is called unidirectional. Some types of bacteria use this type of mechanism.
(c) In the third mechanism two replication forks are initiated at the origin and as synthesis proceeds the two forks migrate away from one another. This type of replication is called bi-directional. Most organisms, including mammals, use bi-directional replication.
5. What does EGS stand for in geothermal energy?
A) Engraved Geothermal System
B) Enhanced Geothermal System
C) Exhaust Gas System
D) Engineered Geophysical System
(EGS) stands Enhanced Geothermal Systems which can greatly increase geothermal energy utilization. Therefore, option (B) is correct.
What is EGS?Enhanced Geothermal Systems (EGS), which are also referred to as engineered geothermal systems on occasion, present a significant opportunity for significantly broadening the application of geothermal energy.
In an EGS, fluid is injected into the subsurface under conditions that are carefully regulated. This causes previously closed cracks to reopen, which in turn creates permeability in the rock. The increased permeability of the rock makes it possible for fluid to move freely within the newly fractured rock and for heat to be transported to the surface, where it can be used to create electricity.
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Fill in the Venn diagram with the items below
Answer:
Prokaryotes : DNA in cytoplasm
Eukaryotes : DNA in nucleus
Prokaryotes and Eukaryotes :
- contain cystol
- bound by membrane
- ribosomes
How are the outputs (Carbon dioxide water and energy) of respiration used
Answer:
During the process of cellular respiration, carbon dioxide is given off as a waste product.
This carbon dioxide can be used by photosynthesizing cells to form new carbohydrates.
Also in the process of cellular respiration, oxygen gas is required to serve as an acceptor of electrons.
answers to ten and tweleve please giving brainlist
Answer:
A and D
Explanation:
the Calvin cycle in photosynthesis doesn't need sunlight and this worksheet seems to focus on energy from the sun and how it is used in plants
Help pls.....................
Answer:
a force that attracts objects to one another.
A brown guinea pig mates with a white guinea pig. All of the babies have tan, or light brown fur. The hair color trait in guinea pigs is probably ____.
1. Sex linked
2. Recessive
3. Incomplete dominance
4. Codominant
Answer:
It would be sex linked.
Explanation:
As you know (if you do), when two animals mate, they combine their genes to make a baby. So of their skin colors are different like one is brown and one is white, then you get a baby that would look brownish white or have spots that are brown or white.
PLEASE HELP!!! WILL GIVE BRAINLIEST!!!
Answer:
the answer is B
Explanation:
As it releases so does the potassium ions
is not sleeping bad for u
hi I didnt sleep for 16 hours and I have messed up sleep pattern
will i commit no alive
Answer:
It depends. 16 hours is a long time not to sleep. You need to sleep though. Your body needs at least 8 hours of sleep. But you need at least 5 to 6 hours of sleep. So your body can regenerate itself.
Explanation:
g It was noted in the Experimental Pathways feature in Section 10.4 that at least two- thirds of the human genome is derived from transposable elements. The actual number could be much higher, but it is impossible to make a determination about the origin of many other sequences. Why do you suppose it is difficult to make assignments about the origin of many of the sequences in the human genome
Answer:
TEs are repetitive and mobile elements, thereby it is hard to trace their origins
Explanation:
Repetitive elements are patterns of nucleotide sequences in the DNA characterized to have multiple copies throughout the genome. DNA mini-satellite and Transposable Elements (TEs) are some examples of highly repetitive DNA. TEs are repetitive mobile elements that have the ability to jump within the genome and occupy a major part of eukaryotic genomes. For instance, there is a type of TEs called retrotransposons which mobilize through a copy-and-paste mechanism, thus increasing their number in a genome. In consequence, TEs represent highly repetitive and dynamic genomic sequences, and thereby it is hard to trace their evolutionary histories.
what should be the daily routine labor requirements in the farm plot? Cite at least 5 daily labor requirements?
Answer:
Explanation:
Labor requirements are the tasks carry out in farms for effective production and these include;
1. Watering...the farmer or worker is expected to water the plants so that they will absorb water for effective growth..
2. Fertilization application for improve yield
3. Weeding to reduce competition for nutrients, space and water with crops.
4. Prunning
5. Harvesting of matured crops.
6 . Transporting of harvested crops.
5 daily requirements in a farm plot are:
Watering of plantsWeedingFertilizinguse of pesticidesTransportationWhat is a farm plot?This is an area of land that is used for agricultural purposes. A farm plot usually has one or more crops planted on the soil.
The farmers has to water the crops daily to ensure that the crops grow well. He also has to weed to reduce competition for the crops.
Using fertilizers helps to improve the yields and pesticides drives unwanted insects from the crops.
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Ecosystems can stay stable for hundreds of years, but loss of resources or addition of disease can quickly change the dynamics of said ecosystem.
True
OFalse
((I need the punnet square but not sure how to make it))
Answer:
i don't know why but you probably don't want to go to the link... sorry
Answer:
Explanation:
Okay, so the female's eyes will be Xx because she carries it and I am not sure if the male is a carrier as well or not so if he is it will be Xx on the top and Xx on the side of the male is not then it will be XX and Xx and it does not matter which is on top which is on the bottom. If the male is a carrier then the outcomes will be XX, Xx, Xx, xx so they will have a 1:4 chance of getting white eyes if the male is NOT a carrier then it will be XX+Xx = XX, XX, Xx, Xx with no chances of having white eyes
After synapsis, chromosomes may swap segments in a process called translocation.
True
False
Answer:
false
Explanation:
During synapsis, chromatids of homologous chromosomes exchange segments in a process called crossing over. This rearranges genetic info. As this phase continues the chromosomes coil tightly and a spindle forms.
An estuary collects sediments from the ocean and rivers that feed into it. The sediments swirl around and then settle to form a mudflat. Eel grass is then established on the mudflat. The ecosystem changes over time and ultimately develops into a salt marsh that contains mangrove trees.
Which of the following is likely NOT involved in this example of ecological succession?
A)
The rotting remains of plants add to the fertility of the soil.
B)
The soil becomes so fertile that eel grass is replaced by other plant species.
C)
The roots from plants help stabilize the sediment, keeping it in place.
D)
The concentration of salt becomes so high that all plant life is destroyed.
Can y'all included detail answers on why the other answers are incorrect
Please help asap (Photosynthesis, look at the image)
Answer:
A: store energy in the form of ATP
Some people think that one half of a sample decays after one half-life and the remaining decays after
another half-life so that there is no radioactive material remaining Explain why this is false
Answer:
yes it is false
Explanation:
correct
Factors that control traits are called?
a. genes.
b. purebreds.
c. recessives.
d. parents
Answer:
A. Genes
Explanation:
This is an example of which factor that affects biodiversity?
pollution
nonnative species
habitat destruction
poaching
Answer:
Several years ago, fish from Asia were introduced into ponds in the United States. They have rapidly grown in numbers and use up a lot of the food and habitats of other fish that are natural to the United States.
This is an example of which factor that affects biodiversity?
pollution
nonnative species
habitat destruction
(poaching)
Explanation:
Or you can just say D
Several years ago, fish from Asia were introduced into ponds in the United States. They have rapidly grown in numbers and use up a lot of the food and habitats of other fish that are natural to the United States. Thus, option "D" is correct.
Why Poaching is illegal?Poaching is the act of illegally killing an animal. The very prominent subject of poaching is the rhino, some species of which are now virtually extinct due to extensive illegal hunting. However, many other animals are also poached. For example, elephants are poached for the ivory in their tusks. Tigers are poached as trophy animals or for traditional medicine. Sea turtles and lemurs also suffer a similar fate for similar reasons.
Thus, option "D" is correct.
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