Answer:
A stem cell is A. a specialized cell that can divided limitlessly
Explanation:
sorry if i keep answering ur questions im j good at this stuff lol
Answer:
D.
Explanation:
Stem cells differ from other kinds of cells in the body. All stem cells—regardless of their source—have three general properties: they are capable of dividing and renewing themselves for long periods; they are unspecialized; and they can give rise to specialized cell types. Stem cells are unspecialized.
I hope this helps! ^^
please help me with this , thank you so much
Answer:
1)mitosis 2)meiosis 3)mitosis 4)meiosis 5)meiosis 6)mitosis 7)mitosis 8)meiosis specifically in prophase 1
Explanation:
gizmos Student Exploration: Photosynthesis Lab answer key pleaseeeee
What are Hydrothermal Vents? Do they contribute to the saltiness of the sea? Why or why not?
Answer:
These vents contribute dissolved minerals to the oceans, which is one reason the oceans are salty. Rivers and surface runoff are not the only source of dissolved salts. Hydrothermal vents are recently-discovered features on the crest of oceanic ridges that contribute dissolved minerals to the oceans.
Hydrothermal vents form at locations where seawater meets magma
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How would you compare
and contrast physical and chemical properties?
Answer:
The Answer is in the Explanation Bellow
Explanation:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
Answer: Chemical change produces a new substance, while a physical change does not. A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced.
Explanation:
Consider, pea plants, for which green color is dominant to yellow color, and two leaves are dominant to three. A cross between two plants that are heterozygous green and heterozygous tall is completed. What is the phenotypic ratio? 1:1:1:1
9:3.3:1
1:3:3:9
9:1:3:3
Answer:
The phenotypic ratio is 9:3:3:1
Explanation:
Available data:
green color (G-) is dominant to yellow color (gg)G allele is dominant. g allele is recessivetwo leaves (T-) are dominant to three (tt)T allele is dominant, t allele is recessiveCross: between two plants that are heterozygous green and heterozygous tall
Parentals) GgTt x GgTt
Phenotype) Green color Green color
Two petals Two petals
Gametes) GT, Gt, gT, gt GT, Gt, gT, gt
Punnett Square) GT Gt gT gt
GT GGTT GGTt GgTT GgTt
Gt GGTt GGtt GgTT Ggtt
gT GgTT GgTt ggTT ggTt
gt GgTt Ggtt ggTt ggtt
F1) Genotype:
1/16 GGTT
2/16 GGTt
1/16 GGtt
2/16 GgTT
4/16 GgTt
2/16 Ggtt
1/16 ggTT
2/16 ggTt
1/16 ggtt
Phenotype:
9/16 G-T- --> Green-colored and two-leaved plant
3/16 G-tt ----> Green-colores and three-leaved plant
3/16 ggT---> Yelow-colores and two-leaved plant
1/16 ggtt ---> Yeloow-colores and three-leaved plant
why is graphing scientific data important?
Ecologists are interested in quantifying different kinds of biodiversity. In each of the two studies outlined here, which kind of biodiversity are ecologists studying?
a. Ecologists draw blood samples from basking shark (Cetorhinus maximus) specimens caught from a single large population in the Atlantic Ocean. From each blood sample, the ecologists isolate DNA. Comparing several DNA sequences across the individuals that were sampled, the ecologists are able to estimate the variation in DNA sequences in the entire population.
b. Ecologists establish 20 small areas, called plots, randomly scattered across a California grassland. They count the number of different plant species present in each plot. By noting how many species appear in the plots, the ecologists are able to estimate the number of species in the entire grassland.
Answer:
The correct answer is -
A. Genetic diversity.
B. Species diversity
Explanation:
In the first study, ecologists are studying the DNA sequences of the basking sharks and comparing the DNA they collected from the blood sample for finding the variation in DNA. The study of DNA and comparing the variations of DNA of a species is studying the genetic diversity of the species.
In the second study, the ecologists tried to study the different types of species present in small patches or plants, they created small patches of land, it is the study of species diversity.
In RNA processing, the coding sequence that remains
in the final mRNA.
A. exons
B. operon
C. genome
D. diploid
E. nucleosome
F. recessive
G. restriction enzyme
H. haploid
I. dominant
J. gel electrophoresis
Answer:
The answer is A. exons.
Explanation:
Exons-In RNA processing, the coding sequence that remains in the final mRNA.
How does carbon dioxide leave the atmosphere?
A women has blood type o, her baby has type a: is it possible that a man who has the blood type ab could be the father?
Answer: Yes it could
Explanation: type o is the type that can be donated to anyone and it is a rare kind and it's also dominated the father type ab is a type where it's not as dominant but it can take over there for the baby could be type a cause type o is rare to get.
Agriculture has only a positive impact on the land.
True or False?
False; Agriculture can negatively impact the environment when fertilizer enters the water, contaminating it. Agriculture can also lead to deforestation, the lack of trees will lead to erosion.
What is a real world example of a molecular pump in the human body?
Answer:
The most common example of a molecular pump in the human body is the pump for sodium and potassium.
Explanation:
Sodium ions and ATP bind to the pump to use energy to change the shape. The sodium then leaves and the potassium can now bind due to the shape change. The potassium ions are then released and the pump goes back to normal for the cycle to repeat again.
What are four conditions in the body related to maintaining homeostasis?
Answer:
Regulation of body temperature, blood pressure, PH and glucose concentration are four examples of how the body maintains homeostasis. hope this helps
Need some quick help with this:
Answer:
Explanation:
D
Answer:
option C
Explanation:
cellular respiration is the correct answer of this question.
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Why are fossils not found in igneous rocks?
Igneous rocks are too dark in color to contain fossils.
Igneous rocks are found too deep underground.
Igneous rocks are made from cooling of lava or magma.
Igneous rocks are too dense to contain fossils.
Answer:Igneous rocks are made from cooling of lava or magma.
In actuality, the DNA sequence of the human genome is NOT random. Some sequences, including some very large sequences, are repeated many times throughout the human genome. Write two ideas you have for how this fact complicates the use of CRISPR gene-editing technology in humans.
Answer:
repeated DNA sequences decrease the target specificity of the CRISPR-Cas system, and may lead to off-target effects
Explanation:
The CRISPR-Cas system is a versatile and powerful tool for gene editing. This gene-editing tool consists of a single guide RNA (sgRNA) that guides the Cas endonuclease protein to the appropriate genomic locus, where Cas generate a double-strand break in the DNA and thus induces DNA repair either by Non-homologous end joining (NHEJ) or Homologous Recombination (HR) repair pathways. The sgRNA consists of a 17-20 nucleotide sequence which is complementary to the target DNA, this sequence is called crispr RNA (crRNA). The existence of repeated DNA sequences hampers the specificity of the CRISPR-Cas tool because a particular sgRNA is able to guide Cas9 to different genomic loci that have the same (repeated) nucleotide sequence complementary to the crRNA. In consequence, repeated DNA sequences may lead to undesired off-target effects, i.e., unintended cleavage (and therefore unintended mutations) at untargeted genomic sites.
Severe storms all have extremely strong winds that can cause a lot of environmental damage.
Which storm below has the strongest winds?
O cyclone
O hurricane
O thunderstorm
O tornado
The storm that has the strongest winds is TORNADO.
A tornado can be defined as a narrow-violent rotating column of air in contact with the ground, which is often attached to the base of a thunderstorm.It is hard to observe a tornado unless it forms a condensation vertical wind tunnel composed of water droplets and dust. In the most violent tornadoes, wind speed may reach 300 miles (480 kilometers) per hour.In conclusion, the storm that has the strongest winds is TORNADO.
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Answer: its tornado i just took the test on edge2020 on the storm assignment.
Explanation: :)
EMB agar is a medium used in the identification and isolation of pathogenic bacteria. It contains digested meat proteins as a source of organic nutrients. Two indicator dyes, eosin, and methylene blue inhibit the growth of gram-positive bacteria and distinguish between lactose fermenting and non-lactose fermenting organisms. Lactose fermenters form a metallic green or deep purple colonies, whereas the non-lactose fermenters form completely colorless colonies. EMB agar is an example of which of the following?
a. a selective medium onlyb. a differential medium onlyc. a selective medium and a chemically defined mediumd. a selective medium, a differential medium, and a complex medium
Answer:
a selective medium, a differential medium, and a complex medium
Explanation:
EMB Agar (Eosin Methylene Blue Agar) is both a selective and differential culture medium that slightly inhibits Gram-positive bacteria and can be used to distinguish bacteria capable of fermenting lactose from those that are unable to ferment this disaccharide. This medium is commonly used for isolation and differentiation of coliforms (i.e., bacteria found in the soil and water samples) and fecal coliforms (bacteria found in the gut and feces samples). In EMB agar, lactose-fermenting-gram-negative bacteria (e.g., E. coli) will form colored colonies, while non-lactose-fermenting-gram-negative bacteria will form colorless colonies (e.g., Salmonella). EMB agar is composed of lactose, gelatin, methylene blue dye and eosin Y dye ( a xanthene dye) .
Knowing that the genetic code is universal, scientists use molecular biological methods to insert the human beta-globin gene into bacterial cells, hoping the cells will express it and synthesize functional beta-globin protein. Instead, the protein produced was nonfunctional and is found to contain many fewer amino acids than does beta-globin produced by eukaryotic cells. Explain why.
Answer is given below :
Explanation:
When the beta-globin gene is inserted into the bacterial chromosome, during insertion, beta-globin forms a stop codon between the coding sequences of beta globin, resulting in a reduced amino peptide. Acid on translationFurthermore beta-globins form a tertiary protein complex with alpha-globin, which in addition to the ham-subgroup forms functional hemoglobin. Since we only put the beta-globin gene on the bacterium-chromosome that is not enough to make a functional protein, we found a non-functional proteinI GIVE OUT BRAINLIEST
How is the nitrogen cycle important to humans?
OS
It produces free nitrogen that humans can breathe.
It converts nitrogen into a form that humans can obtain by eating other organisms.
It produces nitrogen compounds that humans can breathe.
It converts nitrogen into a form that humans can obtain by absorbing it through their skin.
Answer:
B. It converts nitrogen into a form that humans can obtain by eating other organisms.
Explanation:
Right for e2020
The _____ strand of the opened DNA is easily replicated, but the ______ strand must be replicated in pieces because of it's orientation.
a. lagging; leading
b. leading; lagging
c. bottom; top
d. top; bottom
Answer:
B. Leading; lagging.
Explanation:
The leading strand is made as a continuous piece. The the lagging strand is made in small pieces.
I give you brilliant
Answer:
Adenine and Guanine
Explanation:
These two bases are included in the 4 types of nitrogenous bases. Which are the two purine bases (which are Adenine and Guanine)
Which element is the basis for all living things and can combine with other elements in many ways?
phosphorus
carbon
oxygen
sulfur
Answer:
Carbon is the most important element to living things because it can form many different kinds of bonds and form essential compounds.
Believe this ITS CARBON NOT OXYGENNNNN
Carbon is the basis for all living things and can combine with other elements in many ways. Hence, option B is correct.
What is the role of carbon in living organisms?Plants employ carbon to create their leaves and stems, which animals then eat and use for cellular growth. Gases like carbon dioxide are among the forms of carbon that are stored in the atmosphere. Additionally, many different marine species catch it and store it in the oceans.
Carbon serves as the fundamental building block for the majority of cells in the human body. The regulation of the body's physiology is another job for carbon. There are important biological activities that involve carbon in both plants and animals.
Thus, carbon is the basis for all living things and can combine with other elements in many ways. Hence, option B is correct.
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What happens during Go phase of the cell cycle?
O A. The cell splits in two.
B. The cell starts to die.
O c. The cell continues to live.
D. The cell makes new chromosomes.
Explanation:
The answer is C. because this is a new cell that is not preparing to divide or die..
Is colorblindness inherited from a persons parents or do they get it from the environment?
Answer:
The most common kinds of color blindness are genetic, meaning they're passed down from parents. If your color blindness is genetic, your color vision will not get any better or worse over time. You can also get color blindness later in life if you have a disease or injury that affects your eyes or brain.
Answer:
yes ,mostly colorblindness is inherited
What are two ways selective breeding is helpful in agriculture? A. It can take many generations to get desired traits. B. It can cause animals to inherit two recessive alleles C. It can produce crops that are resistant to pests. D. It can result in animals that can produce more food.
The two ways in which selective breeding is helpful are that it can produce crops that are resistant to pests and animals that can produce more food; these are options C and D.
What is the importance of selective breeding?Selective breeding produces plants and animals that are genetically modified to have a specific trait, such as animals being modified to produce higher-quality milk and meat or plants being modified to produce pest-resistant foods. This type of breeding and its resultant product are different from the wild type, and generally, these products are made for the commercial purpose of feeding a large population.
Hence, the two ways in which selective breeding is helpful are that it can produce crops that are resistant to pests and animals that can produce more food; these are options C and D.
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A trait that makes an individual different from other members of it species is called
Answer: An inherited trait that makes an individual different from other members of its species is called a variation.
A trait that makes an individual different from other members of it species is called variation.
What is trait?
Trait is defined as the physical or behavioral traits that are impacted by an organism's surroundings and are handed down to it genetically or through observation.
It can also be defined as a simple trait, also known as a character state, is a specific variation of an organism's phenotypic characteristic that can be inherited or acquired by environmental factors, but it usually results from a combination of the two.
There are basically five types of traits.
Mendel's pea plant traitsDog coat traitsMonogenic traitsPolygenic traitsBehavioral traitsVariation is defined as any genetic variation or the impact of environmental circumstances on the development of genetic potential that results in a difference between cells, individuals, or groups of organisms of any species.
Thus, a trait that makes an individual different from other members of it species is called variation.
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It maintains homeostasis by working with all body systems
A. Musculatory
B. Skeletal
C. Nervous
D. Digestive
Answer:
The answer is C. Nervous
Blease give me BRAINLEST
Answer:
C
Explaination:
8. In snapdragons, red flower (R) color is incompletely dominant over white flower (1) color. The heterozygous (Rr)
plants have pink flowers.
A. If a red-flowered plant is crossed with a white-flowered plant, what are the genotypes and phenotypes
of the plants F1 generation?
B. What genotypes and phenotypes will be produced in the F2 generation?
C. What kinds of offspring can be produced if a red-flowered plant is crossed with a pink-flowered plant?
D. What kind of offspring is/are produced if a pink-flowered plant is crossed with a white-flowered plant?
Answer:
A. Genotypes: Rr
Phenotypes: All Pink
B. Genotypes in the F2 generation: RR, 2Rr, rr
Phenotypes: red, pink and white
C. 1RR (red): 1Rr (pink).
D. 1Rr (red) : 1rr (white).
Explanation:
This question involves one gene coding for flower color in snapdragon plants. The allele for red color (R) is incompletely dominant over the allele for white color (W), to form an intermediate pink color (RW).
A. If a red-flowered plant (RR) is crossed with a white-flowered plant (rr), the genotypes of the offsprings will be Rr with a pink color phenotype.
B. In the F2 generation i.e. Rr × Rr, the following will be produced: RR (red), 2Rr (pink), and rr (white).
C. if a red-flowered plant is crossed with a pink-flowered plant, the following will be produced: 1RR (red): 1Rr (pink).
D. if a pink-flowered plant is crossed with a white-flowered plant, the following will be produced: 1Rr (red) : 1rr (white).
Question 18 of 20 :
Select the best answer for the question.
18. How has the use of herbicides affected agricultural productivity?
O A. Fewer pesticides are needed because of parasitoids.
OB. Fewer people are needed to weed because of herbicides.
O C. Fewer crops are produced because of herbicides.
O D. Fewer crops are organic because of the use of Bt toxin.
O Mark for review (Will be highlighted on the review page)
Answer:
B. Fewer people are needed to weed because of herbicides.
Explanation:
Herbicides are chemical substances specifically used to control the widespread growth of weeds i.e unwanted plants. Using herbicides has been useful in eradicating the weeds that pose a great threat to agricultural productivity.
Since chemical control (herbicides) has proven to be a faster and effective method, fewer people are needed to involve in the physical control of weeds i.e. weeding. Hence, the use of herbicides has affected agricultural productivity by helping to reduce the amount of laborers.