Answer:
A
Explanation:
Today, the atmosphere holds about 21 per cent oxygen. ... When the first simple organisms appeared in the oceans more than 3.5 billion years ago, the atmosphere was mostly nitrogen, hydrogen, water vapor, and carbon dioxide
Sofia, a scientist, wants to change the DNA of a sexually reproducing organism and have the
new DNA present in every cell of the organism. In order to do this after fertilization, she would
change the DNA in which of the following?
A. Zygote
B. Placenta
C. Testes of the father
D. Overuse of the mother
Sofia, a scientist, wants to change the DNA of a sexually reproducing organism and have the
new DNA present in every cell of the organism. In order to do this after fertilization, she would
change the DNA in which of the following?
A. Zygote
B. Placenta
C. Testes of the father
D. Overuse of the mother
Answer :C. Testes of the father
ありがとうございました!
Explanation:Men determine the sex of a baby depending on whether their sperm is carrying an X or Y chromosome. An X chromosome combines with the mother's X chromosome to make a baby girl (XX) and a Y chromosome will combine with the mother's to make a boy (XY)
Explain why the accidental and intentional introduction of new pests is likely to be an ongoing problem for future agriculture, and include possible approaches to solving the problem.
The introduction of pests in a new geographic region may have devastating consequences on crop yields. Invasive pest species often don't have natural predators or exhibit higher adaptive fitness.
Invasive species represent an important subject of concern in agriculture because they have the potential to drastically reduce crop yields.
Generally, invasive pest species don't have natural predators or exhibit higher adaptive fitness compared to well-established natural pest species.
In consequence, these species (invasive species) may cause considerable harm to crops.
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Carla was recently diagnosed with a brain tumour and has since completely lost
her appetite. The brain tumour is likely located in her:
dorsal hypothalamus
lateral hypothalamus
ventromedial hypothalamus
medial hypothalamus
Answer:
hypothalamus
Explanation:
Hunger is partly controlled by a part of your brain called the hypothalamus, your blood sugar (glucose) level, how empty your stomach and intestines are, and certain hormone levels in your body. Fullness is a feeling of being satisfied.
Definition Of polar molecules and nonpolar molecules please?
Answer:
Non polar molecules are symmetric with no unshared electrons. Polar molecules are asymmetric, either containing lone pairs of electrons on a central atom or having atoms with different electronegativities bonded.
Explanation:
When things are different at each end, we call them polar. Some molecules have positive and negative ends too, and when they do, we call them polar. If they don't, we call them non-polar. Things that are polar can attract and repel each other (opposite charges attract, alike charges repel).
Only 3% of the water on earth is fresh water, the kind we need for drinking and growing food. Of that 3% , how much is locked in ice caps, and permanent snow.
Answer:
2.5%
Explanation:
Based on the chart, describe the trends that can be observed in animal and plant fossils as they evolved over time. Use evidence from the chart to support your conclusions.
Based on the chart, we can conclude that the first vertebrates were fish. Moreover, the chart also shows that flowering plants are the last plant taxonomic group that emerged on Earth.
In this case, the chart suggests that the earliest vertebrates (fish) evolved during the Ordovician period.
The main animal groups that emerged during vertebrate evolution include (in this order) amphibians, reptiles, mammals, birds and finally humans.
Moreover, according to the chart, the latest major group of plants to evolve were flowering plants during the Cretaceous period.
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Choose ALL of the correct answers.
Which of the following must be true in order for natural selection to occur?
Group of answer choices
There must be variation in traits in the population
The trait must cause the individual to evolve
The trait must have no other advantage in fitness
The trait must be for the good of the species
The trait must be heritable
The trait must advance the goal of evolution
Answer:
For natural selection to occur, it is true that there must be genetic variation in the population.
Explanation:
According to evolution, natural selection implies the changes that occur in the genotype of a species, due to the effect of environmental factors, and which guarantee its survival through adaptive evolution.
For natural selection to occur, three fundamental conditions must exist:
A trait that can be inherited from one generation to another.
The trait is subject to variability between subjects of the same species.
Genetic variability can determine the possibility of reproductive success and survival.
Therefore, a necessary factor for natural selection to occur is that genetic variability exists in the population.
For natural selection to occur :-
There must be variation in traits in the population.The trait must cause the individual to evolve.The trait must be for the good of the species.The trait must be heritable.The trait must advance the goal of evolution.What is Evolution?It is the change in the characteristics of a species over several generation.It relies on the process of natural selection.
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Explain the difference between the inner core and outer core. What Earthly feature do they produce that protects Earth from solar weather?
The Earth core has two layers: the outer core, and the inner core. Moreover, the magnetic field protects Earth from solar weather.
The Earth's magnetic field is an invisible layer that protects life from the majority of the solar wind blast.
The magnetic field covers us from charged solar particles that crash into it and then flow around it.
Moreover, the Earth core has two layers: the outer core and the inner core, which are separated by a boundary known as the Bullen discontinuity.
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1. There are two birds that live in the same type of tree, same climate, and eat the same type of fruit. However, one is nocturnal (awake at night) and the other is diurnal (awake in the day). Explain why these two birds are considered to have different niches.
Answer: different species
Explanation: They live in the same community like a Gouldian finch and a Double-Barred finch but are different species
However, one is nocturnal (awake at night) and the other is diurnal (awake in the day) as it consist of different species and they live in the same community like a Gouldian finch and a Double-Barred finch but are different species.
What shows the low light in the evening?The hours of low light in the evening shows that it would be when humans would be most at risk from dangers. Species might make sense to seek shelter during this period.
As a result of their divergent evolutionary paths, various species have evolved in various ways to adapt to their habitats. The reason a certain species is nocturnal or diurnal has a variety of different potential causes. Perhaps at night, when light levels are low, when humans would be most exposed to dangers. The decision to seek sanctuary during this time may therefore be justified. Considering the various predatory dangers that mice and rats encounter, it is possible that being active at night reduces the threat posed by predators like birds who utilize their visual senses to identify prey.
Therefore, However, one is nocturnal (awake at night) and the other is diurnal (awake in the day) as it consist of different species and they live in the same community like a Gouldian finch and a Double-Barred finch but are different species.
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Which of the following are consequences of the Dust Bowl of the 1930s?
I. Banks extended loans to farmers to help rebuild impacted area
II. New policies to prevent the dust bowl from happening again
III. Mass migrations and widespread poverty and lack of food
I only
III only
I and II
II and III
Answer:
I think it is the first one
Explanation:
I
A researcher sequences the genome of a variety of bacterial and eukaryotic cells. She finds that the bacterial genome is smaller, but that there are more genes for a given number of base pairs in the eukaryotic cells. In other words, there are fewer genes per unit of length of DNA in the eukaryotic cells. What do you predict she will find if she examines the DNA more closely
From this observation, it is possible to conclude that there are more repetitive sequences in the eukaryotic DNA than in the bacterial DNA. Prokaryotic genes do not contain introns.
Introns are internal non-coding segments of eukaryotic genes that must be removed to produce the final mature mRNA.
In prokaryotic genomes, there are no introns, and genes are expressed in groups known as operons.
Eukaryotic genomes contain highly repetitive intergenic (regulatory) and intragenic (introns) non-coding regions.
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please help me :(
Which of the following describes the intention of the original farm bill?
to raise the values of agricultural products
to expanding incomes of large private sector firms
to regulate options trading on the financial markets
to reduce commodities prices for consumers
Answer:
To regulate options trading on the financial markets .Explanation:
Hope this helps
Answer:
To expanding incomes of large private sector firms.Explanation:
The farm bill connects the food on our plates, the farmers and ranchers who produce that food, and the natural resources – our soil, air and water – that make growing food possible.Hope this helps you !!The core of the immune system is made up of
red blood cells.
platelets.
white blood cells.
intact skin.
intact mucus membranes.
Answer:
red blood cells
Explanation:
white blood cells are used for fighting against diseases
-. What describes the conversion of ADP to ATP?
Answer:
Two processes convert ADP into ATP: 1) substrate-level phosphorylation; and 2) chemiosmosis. Substrate-level phosphorylation occurs in the cytoplasm when an enzyme attaches a third phosphate to the ADP (both ADP and the phosphates are the substrates on which the enzyme acts).
Explanation:
How can accidental transfer of DNA impact a crime scene investigation? In addition, explain why accidental DNA transfer cannot be used as an excuse to throw away all DNA evidence found at a crime scene?
Answer:
orensically valuable DNA can be found on evidence that is decades old. However, several factors can affect the DNA left at a crime scene, including environmental factors (e.g., heat, sunlight, moisture, bacteria, and mold). Therefore, not all DNA evidence will result in a usable DNA profile.
Explanation:
what are the three parts of the data analysis section of a lab report?
Answer:
1) rough reading
2)initial reading
3)final reading
Explanation:
those three are always important for every lab report
Cells use ------ to take in large molecules or other cells
Answer:
Active transport by endocytosis. there is your answer. Explanation :Phagocytosis is the process by which cells ingest large particles, including other cells, by enclosing the particles in an extension of the cell membrane and budding off a new vesicle. During pinocytosis, cells take in molecules such as water from the extracellular fluid.
process of diffusion
How does the environment influence the traits of an individual?
Answer:
If an organism is living in an unhealthy environment, that could lead to hunger, dehydration, no shelter, and possibly death.
Explanation:
please help me i’ll give you brainlist
Answer:
B) Daughter Cells
Explanation:
When a cell divides, the parent cell divides to form two daughter cells.
Answer:
The answer is daughter cells.
Hope that helps. x
narvez 5. Everyone in Dobby's family has a long nose and they brag that they are from a purebred line. Viola has a stubby nose. Draw a punnett square to determine the possible types of noses their children could have had. (Use the genotypes from #2) a. List the possible genotypes and phenotypes for their children. b. What are the chances of a child with a long nose? out of or % c. What are the chances of a child with a stubby nose? out of st or__% d. Would their children be considered purebred like Dobby? Explain:
Assuming a single diallelic gene coding for the trait and expressing complete dominance, the phenotypes, genotypes, and probabilities of getting each of them vary according to the parentals' genotypes. See the options below.
---------------------------------
Since I do not have the genotypes from #2, I will provide different potential scenarios for this question.
I advise you to check on them and see which one matches the genotype from #2.
Let us assume a single diallelic gene is coding for the trait and expresses complete dominance.
SCENARIO 1 ⇒ long nose is the dominant traitLet us say that
L is the dominant allele and codes for long nosel is the recessive allele and codes for stubby noseSince long nose is dominant over stubby nose
LL and Ll ⇒ long nosell ⇒ stubby noseIf Dobby comes from a purebred family and has long nose, his genotype must be LL.
And if Viola has stubbi nose, her genotype must be ll.
Cross 1
Parentals) LL x ll
Gametes) L L l l
Punnett square) L L
l Ll Ll
l Ll Ll
F1) Genotype ⇒ 100% heter0zyg0us Ll
Phenotype ⇒ 100% long-nosed
There is 100% chances for a child to have a long noseThere is 0% chances for a child to have a stubby noseThese children are not purebred**********
SCENARIO 2 ⇒ Stubby nose is the dominant traitLet us say that
S is the dominant allele and codes for stubby noses is the recessive allele and codes for long noseSince stubby nose is dominant over long nose
SS and Ss ⇒ stubby nosess ⇒ long noseIf Dobby comes from a purebred family and has long nose, his genotype must be ss.
And if Viola has stubbi nose, her genotype must be either SS or Ss.
There are two possible crosses.
Cross 1 : Violet is h0m0zyg0us dominant SS
Parentals) SS x ss
Gametes) S S s s
Punnett square) S S
s Ss Ss
s Ss Ss
F1) Genotype ⇒ 100% heter0zyg0us Ss
Phenotype ⇒ 100% stubby-nosed
There is 100% chances for a child to have a stubby noseThere is 0% chances for a child to have a long noseThese children are not purebredCross 2: Violet is heter0zyg0us, Ss
Parentals) Ss x ss
Gametes) S s s s
Punnett square) S s
s Ss ss
s Ss ss
F1) Genotype ⇒ 50% heter0zyg0us Ss and 50% h0m0zyg0us recessive ss
Phenotype ⇒ 50% stubby-nosed and 50% long-nosed
There is 50% chances for a child to have a stubby noseThere is 50% chances for a child to have a long noseThese children are not purebred----------------------------
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What is the usual tone of a argumentative essay?
Answer:
I would say that what the essay is about they're most likely going to be biased disagreeable or agreeable. The tone may be mad.
Explanation:
A change in the sequence of bases in a DNA molecule is know as
Answer:
A point mutation is a change in the base sequence of a DNA molecule.
Explanation:
1. The nose helps the body keep its balance.
a. True
b. False
Answer:
false
Explanation:
The ears help the body keep it's balance. Most issues with the balance arise from conditions affecting the inner ear.
Heeeeeeeeeeeeelp please help me with this now
Answer:
1. Temperature of the Earth over time
2. warm
4. That’s you.but I personally think it’ll gradually go up
5. Depends how you answered it, tell me if you need help or not
Explanation:
1.It talks about the overall graph
2.The Line shows and is labeled Average, the straight line shows the average temperature (is that confusing?)
4-5.Global warming and the graph helps show the increase of temperature so far and it’s educated guess
Which of the following describes the impact on human health from global climate change?
Excess greenhouse gases will cause competition among vectors for hosts, and the vectors will die off.
Global climate change will result in the warming of cooler regions and will increase the spreading of disease.
Melting glaciers will keep regions too cold and prevent vectors from migrating to these regions.
Warmer climates will prevent vectors from traveling to new regions and infecting more humans.
Answer:
B - Global climate change will result in the warming of cooler regions and will increase the spreading of disease.
Global climate change will result in the warming of cooler regions and will increase the spreading of disease. Thus, the correct option is B.
What is global climate change?Global climate change is defined to as the average long-term changes over the entire Earth. These include warming temperatures and changes in precipitation, as well as the effects of Earth's warming, such as rising sea levels. Shrinking mountain glaciers.
Climatic change has become a global issue over the last few decades. Besides, these climatic changes affect life on the earth in various ways.
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What pattern would you expect to see in measurements taken in the Southern Hemisphere over course of a year?
Answer:
The CO2 concentrations would be lowest in April-May and highest in September-October.
Explanation:
What is the haploid number of this species ?
Answer: 3
Explanation:
why is the dominant allele seen in a heterozygous individual
Answer: Since it's the DOMINANT allele that means that it will take over reccesive allele that's why it's shown.
Explanation: A heterozygous individual is an individual where the have both the dominant and reccesive allele for a trait. The dominant allele will always be stronger than the reccesive allele. This results in the dominant allele being shown.
scientists have discovered a mutation that prevents the formation of which are responsible for separating chromosomes
The chromosomes are separated by a structure called the mitotic spindle. The mitotic spindle is made of many long proteins called microtubules, which are attached to a chromosome at one end and to the pole of a cell at the other end. The sister chromatids are separated simultaneously at their centromeres
