Answers
Answer:
These are the steps in order
The DNA double helix unzips
Complementary RNA nucleotide are paired with one strand of DNA
The 2 strands are rejoined
The completed RNA molecule detaches from the DNA
Explanation:
Related Questions
HELPPP!!!! Which element is also an air
pollutant?
A. copper
B. lead
C. silver
D. zinc
Answers
Answer:
lead
Explanation:
Lead element is also an air pollutant. Thus option B is correct.
What are the air pollutants?
Any physical, chemical, or biological changes in air due to contamination by incorporation of harmful gases, dust, and smoke causes air pollution.
The imbalance in the gaseous concentration in air lead to global warming.
There are two major types of air pollutants such as Primary and Secondary Pollutants,
Primary pollutants cause air pollution directly and secondary pollutants are generated by intermingling of primary pollutants.
Lead, Fly Ash, Metallic Oxides, Nanoparticles, Carbon monoxide (CO), Carbon dioxide (CO2), Chlorofluorocarbons (CFCs), Ozone (O3), Nitrogen oxide (NOx), Sulphur dioxide (SO2) are some examples of air pollutants.
A hazardous heavy metal called Lead can cause serious damage to different physiological system of the human body like nervous system damage, Digestive system, affect kidney.
It can also cause cumulative food poisoning. Hence, Lead was banned to add fuels. Thus option B is correct.
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BRAINLIEST!! 5 STARS AND A THANKS!!
Who finally provided enough evidence for the theory of plate tectonics to be widely accepted, and where was this evidence found?
Answers
Answer:
Alfred wegener was the one that provided the evidence for plate tectonics
Answer:
Alfred Wegener
Explanation:
German meteorologist Alfred Wegener is often credited as the first to develop a theory of plate tectonics, in the form of continental drift.
A student claims that the lac operon is an example of a mechanism that an organism uses to conserve energy. Evaluate the validity of the student's claim. The claim is invalid because the lac operon requires a bacterial cell to produce extra regulatory proteins and regulatory segments of DNA. The claim is valid because the lac operon allows a bacterial cell to shut down a metabolic pathway if it is not immediately needed. The claim is valid because the lac operon allows a bacterial cell to maintain constant levels of enzymes even when they are not immediately needed. The claim is invalid because the lac operon requires a bacterial cell to constantly produce the lac repressor protein even when lactose is not present.
Answers
Answer:
The claim is valid because the lac operon allows a bacterial cell to shut down a metabolic pathway if it is not immediately needed.
Explanation:
The lac operon is a cluster of genes which contain the same promoter sequence and are transcribed as a single messenger RNA (mRNA). This operon is inducible because the presence of lactose in the cell influences its transcription. Lactose can bind to the repressor of this operon, leading to a conformation change in the repressor, thereby preventing the repressor from binding to the operator and thus allowing transcription of the structural genes. After lactose addition, the β- galactosidase enzyme can break this carbohydrate into glucose and galactose, thereby there is no lactose able to bind with the repressor and therefore this operon shuts down. During transcription, the promoter of the lac operon binds both RNA polymerase and catabolite activator protein (CAP) and cyclic AMP (cAMP) complex.
1. There are
domains.
1
2
3
4
Answers
Answer:
3
Explanation:
There are three domains of life, the Archaea, the Bacteria, and the Eucarya.
Answer:
There are 3 domains
Explanation:
the Archaea, the Eucarya, the Bacteria.
Difference between phagocytes and red blood cells
Answers
Why is taxonomy important to scientists?
Answers
Which period of time had MORE carbon: pre-industrial or post-industrial revolution?
Answers
Evidence exists that during the millions of years in which the Grand Canyon formed, the canyon divided a single population of tufted-eared squirrels into two populations. One of these squirrel populations, the Kaibab squirrel, now lives in isolation from the other tufted-ear squirrels on the North Rim of the canyon. The other population, the Abert's squirrel lives on the South Rim. Some biologists think that the two populations of squirrels have evolved into two separate species. Other biologists think that the Kaibab squirrel is a subspecies of the Abert's squirrel.
Answers
Answer:
A few of the squirrels manage to cross the canyon and breed with the squirrels on the other side.
Explanation:
The formation of the canyon divide the population of the tufted ear squirrels into two different population or species of the squirrels. One is the Kaibab squirrel which lives in the north Rim of the canyon while the other is the Albert's squirrel that lived in the South Rim.
The Kaibab squirrel has a black belly, white tails and tufted ears while the features of the Albert's squirrel is that it has white belly, white tail and tufted ears.
Now the factors that could make the evolution or the formation of the squirrel population in two different species less likely is the few of the squirrels might have crossed the Grand Canyon and moved to the other part and breeded with the squirrels there. So both the species have somewhat similar features.
in prophase 1 of meiosis, crossing over results in
Answers
Answer:
Crossing over results in Genetic Recombination.
Explanation:
Which is a valid claim about how meiosis I differs from meiosis II?
Answers
Answer:
Homologous pairs of cells are present in meiosis I and separate into chromosomes before meiosis II. In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.
Explanation:
Hope this helps pls mark brainliest!!!
Which of the following scenarios represents change to an ecosystem brought about by biotic factors?
a.
a wildfire caused by lightning striking a tree
b.
a flood caused by a severe storm
c.
a landslide caused by cattle overgrazing
d.
a volcano
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
C
Explanation:
Why is the pituitary gland called the master gland?
O It is the largest gland in the body.
It regulates the work of many glands in the body.
O It helps the brain master higher-level thinking processes.
It controls the heart, which is the master pumping organ in the body.
Answers
Answer:
THE CORRECT ANSWER IS B(It regulates the work of many glands in the body.)
Explanation:
Pituitary gland is known as the master gland because it influences the functioning of other glands like thyroid, testes, ovary etc for it's functioning as endocrine gland.
HOPE THIS HELPS!!!!!!
The pituitary gland called the master gland because it regulates the work of many glands in the body.
Why is the pituitary gland called the master gland?The pituitary gland is also called the "master" gland of the endocrine system because it controls the functions of other endocrine glands. The pituitary gland is located at the base of the brain.
So we can conclude that the pituitary gland called the master gland because it regulates the work of many glands in the body.
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ASAP Arizona deserts have been transformed by: chemical fertilizers use of pesticides irrigation canals recycling plants
this is all the points i have 88
Answers
Answer:
irrigation canals
Explanation:
Answer:
irrigation canals
Explanation:
Tsunami waves are caused by earthquakes in the ocean floor. As the waves approach the shore, they usually grow in height. When this occurs, which aspect of the wave is changing?
A.
amplitude
B.
direction
C.
frequency
D.
speed
E.
wavelength
Answers
Answer:
LETTER A. AMPLITUDE
Explanation:
Got it right on the test
What are some warming behaviors an animal might perform to warm its body temperature up?
Answers
Question 8
How can humans help to reduce ocean acidification?
a
Eat more fish so they will not breath so much carbon dioxide into the sea water.
b
Add chemicals to the ocean which will help to change the pH.
c
Reduce the amounts of fossil fuels used in industry and transportation.
d
Stop throwing plastics in the ocean.
Answers
Answer:
D
Explanation:
Because I learned this in Harvard
Answer:
C, Reduce the amounts of fossil fuels used in industry and transportation.
Explanation:
A makes no sense, B the chemcials can kill certain speices living in the ocean, and D plastic is oil, and oil isn't acidic (it's neutral- it isn't a base of an acid).
Products that we get from our ecosystems that we can use, buy, or sell; are which type of ecosystem service? Group of answer choices, Provisioning services, Supporting services, Cultural services, or Regulating services.
Answers
Answer:
Provision Services
Explanation:
A provisioning service is any type of benefit to people that can be extracted from nature. Along with food, other types of provisioning services include drinking water, timber, wood fuel, natural gas, oils, plants that can be made into clothes and other materials, and medicinal benefits.
New alleles can arise in both asexual and sexual reproduction.
Which of the following statements is TRUE based on the disadvantages of sexual and asexual reproduction.
A- Gametogenesis is the only source of genetic variation for sexual reproduction
B- This answer choice is wrong
C- Mutations are the only source of genetic variation for asexual reproduction
D- Meiosis is the only source of genetic variation for sexual reproduction
Answers
Answer:
C - Mutations are the only source of genetic variation for asexual reproduction
Mutations are the only source of genetic variation for asexual reproduction.
What is mutation?
A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Germline mutations (that occur in eggs and sperm) can be passed on to offspring, while somatic mutations (that occur in body cells) are not passed on.
A mutation is never so advantageous in real life that it makes someone a superhero or does anything strange like give them wings. There are numerous explanations for why mutations typically don't have significant effects.
Therefore, Mutations are the only source of genetic variation for asexual reproduction.
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What ratio of plants in the offspring would you predict from a Yy x Yy cross?
Answers
Answer:
The correct answer is -
The genotype of offspring - 1:2:1 (YY:Yy:yy)
The phenotype of offspring - 3:1 (dominant trait: recessive trait)
Explanation:
In this question, it is stated that there is a cross between Yy and Yy. By the genotype of the parents, we can say that Y is dominant for a particular trait and y is recessive and the parents are in the heterozygous condition in this cross. The gametes these parents will produce are - Y and y and Y and y
then the cross of Yy and Yy would be -
Y y
Y YY Yy
y Yy yy
Offspring from this cross are YY, Yy, Yy, and yy which means the genotypic ratio is - 1:2:1 and the phenotypic ratio is - 3:1 as three out of four are dominant.
What is NOT a solid waste ? A.Methane B.Grass clipping and leaves C.old cell phones
Answers
Answer:
A. Methane
Explanation:
Methane is a gas not a solid. Every other answer choice is a solid.
Why do ionic compounds conduct electric current when they are dissolved in water?
Answers
Describe the role that the protein INSULIN plays in a red blood cell
Answers
Answer:
helps maintain blood sugar
:)
Explanation:
The beta cells of the pancreas produce a peptide hormone called insulin. It is an anabolic hormone that regulates the activity of proteins, fats and carbohydrates in the body.
In blood cells insulin helps to:
Keep blood glucose levels
The role can be explained as:
Insulin is the anabolic protein that helps in breaking down carbohydrates, fats and proteins consumed in food. They signal the muscle and liver cells to absorb the glucose molecules present in the blood.They help the cells and tissues to regulate the glucose uptake for energy and also to store the excess glucose as a glycogen molecule.When there is an increased glucose concentration in blood cells then insulin cues liver cells to convert it into glycogen for future use.In the case of insufficient blood glucose it alerts liver cells to split the glycogen molecule into glucose for furnishing power and to counteract out the equilibrium in the body.Therefore, insulin regulates blood glucose levels.
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i just need these three labeled and i’m good lol
Answers
Which food preservation technique is Paul using?
Paul uses____ technique, which is the most modern technique of food processing and preservation. This technique uses____ rays to kills Insects, mlcrobes, bacteria, and fungi In food.
1. Freeze drying
2. Irradiation
3. Dehydration
__________
1. Alpha
2. Beta
3. Gamma
Answers
Answer:
Paul uses Irradiation. The technique uses gamma rays
Explanation:
Answer:
Agreed.
irradiation
gamma
Explanation:
What is the MAIN difference between prokaryotic (bacteria) cells and eukaryotic cells?
A. Presence of Cell membrane
B. Presence of Nucleus
C. Presence of Cell Wall
D. Single-Cell vs Multicellular organisms
Answers
Answer:
Single cell vs Multicellular organisms
Explanation:
A prokaryote is a single celled organism such as bacteria, whereas eukaryotes are multicellular beings, such as humans and other forms of life made up of multiple cells.
I hope this helps you.
The diameter of a circle is 6 miles. What is the circle's circumference?
Answers
Answer: C=18.85
Explanation: c/circle, hope this helped
Which of the following is a property of water? (4 points)
It can dissolve only acids.
It expands when it melts.
It exists naturally in only in two states.
It has a low surface tension.
It stores heat energy well.
Answers
Answer:
QUESTION NUMBER THREE DONEE YA BOIIIIIIIIII
Explanation:
write downany two organisms which shows binary fission
Answers
Answer:
Amoeba and Paramecium
Answer:
Amoeba,
Euglena
Explanation:
In biology, binary fission is a type of asexual reproduction where a parent cell divides, resulting in two identical cells, each having the potential to grow to the size of the original cell. ... Binary fission is common among prokaryotes, e.g. archaea, eubacteria, cyanobacteria, and certain protozoans (e.g. amoeba)
How can two physically healthy parents produce a child with Down syndrome and a second child with Klinefelter syndrome?
Answers
HELP ! can someone please explain to me on how to set it up ?
Answers
Answer:
The correct answer is -
4/4
100%
Explanation:
In this question, it is given that allele B (blue) is dominant over allele b (purple) and both Randal and cell have the same genotype of recessive alleles that is bb and bb.
The offspring of these two will be the same as the due to gametes Randall and cella produce are same which is b and b.
b b
b bb bb
b bb bb
here all four out of four have the same purple skin with 100% chances.