Answer: TRUE
Explanation:
The cell division that takes place during the growth and development of an organism is in an as MITOSIS. Mitosis takes place in somatic cells that is, body cells that are not involved in the production of gametes. The difference stages of mitosis were originally defined by cellular features observable through a LIGHT MICROSCOPE. These stages includes:
--> PROPHASE: when viewed under a light microscope, each chromosome shortens and thickens and is seen to consist of two chromatids. The Centriole begin to separate.
--> METAPHASE: The nuclear membrane disappears, a spindle forms, the chromosomes line up across the middle of the cell and become attached to the spindle fibres at their centromeres.
--> ANAPHASE: The sister chromatids are pulled apart to opposite ends of cell as the spindle fibres contract.
--> TELOPHASE: A nuclear membrane forms around each set of chromatids, and the cell divides into two daughter cells.
Please help I’ll mark you as brainliest if correct! #10
Answer:
H dominant
Explanation:
If a trait has two possible outcomes and one is expressed over the other, it means one is dominant and the other is recessive. Dominant traits are expressed when there is at least one dominant allele (can be Aa or AA). Recessive traits are expressed only if both the alleles are recessive (has to be aa). If the trait is being expressed over the other one it is a dominant trait.
Crossing over plays a critical role in increasing the genetic variation among offspring of sexual reproduction.
a. True
b. False
Answer:
T
Explanation:
I Got It Right.
Pls help I’m failing
Answer:
C.
Explanation:
Not A. because it didn't mention that (and it's not true)
Not B. because that wasn't mentioned (and common sense tells you it incorrect)
C. because it was mentioned (differently) and it made perfect sense
Not D. because it didn't even talk about how many letters (or sounds) there was to be true (plus look at A. above)
in a microscope never use the _____with ________when you are done
Answer:
In a microscope never use the __scope___with ___high power_____when you are done
Explanation:
The antibiotic rifampicin blocks transcription in many bacteria. In the presence of the antibiotic, adding sigma factor has no stimulating effect on RNA synthesis. A footprinting experiment on a rifamycin treated sample shows that the polymerase remains located at the promoter site in the presence of eNTPs and Mg2 ion. What step of transcription is rifamycin likely to block
Answer:
transcription initiation
Explanation:
Transcription is a process by which genetic information from DNA is used to synthesize an RNA molecule, usually, a messenger RNA (mRNA), which is subsequently utilized to synthesize a protein by a process called translation. Transcription in prokaryotes has three steps:
1-Initiation: the RNA polymerase is a multisubunit enzyme (holoenzyme) composed of two α, one β, one β’ and one ω and σ subunits (α2ββ’ωσ). This holoenzyme binds to the promoter region of the template DNA strand.
2-Elongation. The sigma σ factor of the holoenzyme is released and the complex and the core enzyme (α2 ββω) moves along the template strand, thereby producing an mRNA sequence
3-Termination. This step can be Rho-dependent, where a protein named "Rho" recognizes the termination site and stop transcription, and Rho-independent (transcription continues until the termination sequence is reached).
In consequence, Rifamycin is likely to block the initiation of transcription because the core RNA enzyme needs to bind the sigma factor (σ) for initiation of transcription in bacteria.
A marsupial mole has claws for burrowing, a keen sense of smell, and reduced vision in its eyes. The placental mole, a mammal on a
different branch of the mammalian evolutionary tree, has claws for burrowing, a keen sense of smell, and reduced vision in its eyes.
Which statement(s) describe the relationship between these two moles? Select ALL that apply.
A)
Convergent evolution occurred in these two mammalian species.
B)
These two species evolved under similar environmental pressures.
C)
These two species do not have a common ancestor, but evolved from
separate lineages.
D)
Identical mutations occurred within the two different lineages creating
identical phenotypes.
E)
These two species share a more recent common ancestor than they do with
other mammalian species.
Answer: a and b
Explanation:
i just took it
The relationship between these two mammalian species is that Convergent evolution occurred in these two mammalian species. That is option A.
What is Convergent evolution?Convergent evolution is the type of evolution where distantly related organisms evolve similar traits to adapt to similar environmental conditions.
The marsupial mole and the placental mole are distant species with similar features.
Therefore, the relationship between these two mammalian species is that Convergent evolution occurred in these two mammalian species.
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3.Some plants have structures or features that protect them from harm.
If a plant has bitter-tasting leaves, what would this most likely protect the plant against?Lector inmersivo
(1 Punto)
caterpillars that would eat the plant
cold weather that would cause the plant to freeze
people who would pick the plant for its pretty flowers
hot weather that would cause the leaves to dry up
Answer:
Caterpillars that would eat the plant
Explanation:
Which of the following statements correctly describes the relationship between erosion and deposition?
A.
Erosion breaks rocks into pieces, and deposition moves the pieces.
B.
Deposition and erosion both involve the movement of small pieces of rock from one place to another.
C.
Erosion is the movement of small pieces of rock from one place to another, and deposition is when the rock settles in a new location.
D.
Deposition and erosion break rocks into smaller pieces, but the rocks remain in place.
Answer:
I think It's A
Explanation:
I hope I helped :)
What is the answer to that question
Answer:
D. Steps to use for doing the Heimlich maneuver
Explanation:
That's what the section is talking about.
The diagram below, best represents.
Answer:
B. An Ecosystem
Explanation:
A C and D do not fit the picture.
following the laws of Convervation of matter, 10 grams of iron combined with 5 grams of sulfur will yield _____ grams of iron sulfide
Answer:
15
Explanation:
Since the law of conservation of mass applies to all the chemical reactions this will also end in 10+5 equalling 15 grams
Where would you expect to find humans with the darkest skin color in the Northern Hemisphere (from 10°N to 60°N)?
Answer: Australia
Explanation:
State and discuss two types of immunity.
Answer:
How Does the Immune System Work?
Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection. ...
Adaptive immunity: Adaptive (or active) immunity develops throughout our lives. ...
Passive immunity: Passive immunity is "borrowed" from another source and it lasts for a short time.
[15 POINTS!!]
The diagram below shows a food web.
How would the removal of the rabbit population affect the other populations in the ecosystem?
A. The field mouse population will decrease.
B. The snake population will increase
C. The lizard population will increase.
D. The tree population will decrease
Answer:
C. because the grasshopper will have less competition to eat Grass letting them reproduce more, since the grasshopper's population increases there will be more food for the lizards helping them reproduce more.
how do you survive in mars
What process takes place in meiosis but not mitosis?
A.
sister chromatids separating
B.
crossing over
C.
DNA replication
D.
DNA condensing into chromosomes
Answer:
A. sister chromatids separating
Answer:
will go for b. crossing over
Explanation:
"The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred. The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads."
m/forms/d/e/1FAIpQLSf1siktOoZRkggNo-AzHPw62091WglmEyyJt30t8yy3LbzpVQ/viewform
15. When two similar unicellular organisms fuse and exchange nuclear materials,
it is known as
O A. Haploidy
B. Conjugation
O .
C. Meiosis
D. Nuclear growth
What is the speed of a runner who travels 20m in 10s?
Answer:
2m/s
Explanation:
speed =distance ÷time
can you heat alcohol over an open flame. Give reason for your answer
Answer:
No, you cannot. The problem is that alcohol fumes are flammable. If you heat over an open flame you risk igniting the fumes which will start a chain reactions.
Explanation:
ggl and knowledge
What is the name of the atmosphere we live in, which is about 5-9 miles thick,
depending on where you are on Earth.
A.) The Stratosphere
B.) The Exosphere
C.) The Mesosphere
D.) The troposphere
Answer: d
Explanation: The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.
What is the correct equation for the breakdown of ozone? please answer quick
Answer: This electricity converts the oxygen molecule to ozone. Our equation is as follows: 3O2 + energy = 2O3.
The correct equation for the breakdown of ozone can typically occur in a series of two steps known as the destruction of ozone. It is illustrated thus;
Cl + O3 ⇒ ClO + O2ClO + O ⇒ Cl + O2The net reaction of the above process is the reaction of an oxygen atom with an ozone particle to form two molecules of oxygen.
The catalyst in this reaction is chlorine because it undergoes changes as the process continues while ozone is removed in the process. In the presence of sunlight, atomic oxygen is formed.
This entire process is referred to as the destruction of ozone.
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what is Classification?
Take 50 points
Answer:Classification, in biology, the establishment of a system of categories on the basis of presumed relationships among organisms. The science of biological classification is commonly called taxonomy.
Answer:
Thanks
Explanation:
Thanks
Which of the following is NOT an example of a pre-zygotic barrier?
behavioral isolation
hybrid sterility
habitat isolation,
mechanical isolation
Answer:
isolating mechanisms The reproductive characteristics which prevent species from fusing. Individuals mate in their preferred habitat, and therefore do not meet individuals of other Genomic incompatibility, hybrid inevitability or sterility. show that there is little behavioural, mechanical, or post-mating isolation
Explanation:
i hope all help full
8. In a population of beetles, there is a gene for color with two codominant alleles. The allele R leads to red beetles and the allele B leads to blue beetles. Heterozygous beetles are red and blue spotted. A heterozygous beetle mates with a red beetle. What is are the genotypic and phenotypic frequencies of their offspring? Please show all of your work. (2)
Answer:
The genotypic frequency = 1:1
The phenotypic frequency = 1:1
Explanation:
Given that:
The allele → R = Red beetles
The allele → B = Blue beetles
Since the gene color shows a codominant allele
The Red Beetle = RR
The blue beetles will be = BB
The heterozygous beetle will be = RB
∴
The punnet square showing the crossing of RB × RR is:
R B
R RR RB
R RR RB
The result shows that we have two red beetles and two heterozygous beetles.
Hence;
The genotypic frequency = 1:1
The phenotypic frequency = 1:1
2. How much is the average temperature at depth of 10 km of earth surface?
A) 200 °C
C) 650°C
B) 900°C
D) 20°C
The average temperature at depth of 10 km of the earth's surface is 200°C. Thus, the correct option is A.
What is the average temperature?An average temperature may be defined as the annual mean temperature of any geographical location which is estimated approximately by the average temperature of the maxima and minima for the warmest and coldest months of the year.
It is the principle that the increase in the depth below the surface of the earth ultimately leads to the rising of average temperature. This is due to the process of apparent heat.
It may be possible that higher or lower temperatures also occur. but the average temperature at depth of 10 km of earth surface should approximately remain 200°C. It is a factual type of question.
Therefore, the average temperature at depth of 10 km of the earth's surface is 200°C. Thus, the correct option is A.
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please help me it’s due in 20 minutes
Answer:
ok
Explanation:
1. p
2. n
3. n
4. p
5. n
6. p
7.p
8. n
Which of the following is true about pea
plants?
A. They produce a small number of offspring.
B. They produce asexually.
C. Their female parts can be artificially pollinated.
D. They don't have many contrasting characters.
The statement true about pea plant are as,
They produce a small number of offspring.Their female parts can be artificially pollinated.What is artificial pollination?The pollination which is carried by human is called artificial pollination.It is used to pollinate plants when natural pollination is insufficient and undesirable.The artificial pollination consider as mechanical technique.There is no requirement of insect and weather.The example of plant in which artificial pollination can occur is kiwifruit.To learn more about artificial pollination here.
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The fossil record indicates that in some cases reasonably well-defined species appear suddenly and remain unchanged for a long time before they become extinct. This phenomenon is referred to as
Answer:
The correct answer is - punctuated equilibrium.
Explanation:
The phenomena represent punctuated equilibrium, according to which the new well-defined species appear suddenly and quickly. These species remain unchanged for a long time as they occur because of mutations in genes.
This phenomenon suggests that once it made in the fossil record the population becomes stable for a long time until they become extinct and have to adapt to the changes take place to survive.
Drag each label to the correct location on the table. Sort the observations based on whether they are quantitative or qualitative.
Answer:
Qualitative observations are those that cannot really be counted or measured by empirical figures, but are rather described by the features they have such as their color or taste.
Quantitative observations can be measured and counted by empirical figures i.e. numbers such as age and temperature. Number operations such as addition can be performed on them as well.
Qualitative observations.
The shirt is soft and red.The river flows more quickly in the spring than in the summer.Quantitative observations.
There are eight elephants over the age of six at the zoo. It is 72 degrees Fahrenheit outside.Answer:
Quantitative observation:
There are eight elephants over the age of six at the zoo.
It is 72 degrees Fahrenheit outside.
Qualitative observation:-
The shirt is soft and red.
The river flows more quickly in the spring than in the summer.
Taking two aspects of their relationship, explain how the marriage of the Prophet and Khadija set a good example for Muslim marriages today?
Answer:
Due to their behaviour towards each other.
Explanation:
The marriage of the Prophet and Khadija set a good example for Muslim marriages today because their strong relationship and respect towards each other is the key to their beautiful marriage life. In marriage life, both husband and wife has great contribution to their relationship. If both husband and wife respect each other and support in every situation of life so their relationship will be strong and they live a beautiful marriage life so we can say that the marriage life of Prophet (S.A.W) and Khadija is a good example for all Muslims.