Answer: He used it to study the ancient cells in fossilized wood.
Explanation:
What are examples of molecules that can be used for molecular clock?
A. Mitochondrial DNA
B. Ribosomal RNA
C. Cytochrome C
D. Chloroplast DNA
Answer:
The biomolecular data used for such calculations are usually nucleotide sequences for DNA, RNA, or amino acid sequences for proteins.
Answer:
Examples of molecules that can be used for molecular clocks include: Mitochondrial DNA , Ribosomal RNA , and Cytochrome C.
Let me know if this helps!
"Crossing Over" is a key part of the process because it leads to:
a
the completion of mitosis
b
growth and repair of body cells
c
genetic variation
Answer:
d
Explanation:i just know
Scientists use the process of genetic engineering to
Answer:
Genetic engineering is used by scientists to enhance or modify the characteristics of an individual organism. ... For example, genetic engineering can be used to produce plants that have a higher nutritional value or can tolerate exposure to herbicides
Answer:
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What causes ocean water to be colder at the poles than at the equator
Answer:
Ocean currents warmed by the Sun's energy carry heat from the equator toward the poles as well. Evaporation of surface water, rain and other precipitation, wind and ocean currents move warm air toward the poles and bring cold air toward the equator.
Explanation:
HELP ME PLEASE BEEN LOOKING FOR AN ANSWER FOR HOURS
What materials do motor neurons need to survive and how do they get those materials?
Answer:
Neurons are made up of three major parts: a cell body, or soma The part of the neuron that contains the nucleus of the cell and that keeps the cell alive., which contains the nucleus of the cell and keeps the cell alive; a branching tree like fiber known as the dendrite, which collects information from other cells and sends the information to the soma; and a long, segmented fiber known as the axon, which transmits information away from the cell body toward other neurons or to the muscles and glands.
do you guys know what to do? because i definitely don’t. i’m stumped so 20 points if you guys can help me out.
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i
Select the correct response regarding the relationship between photosynthesis and cellular respiration. a The reactants and products of photosynthesis has no relationship with the reactants and products of cellular respiration.
A. The reactants and products of photosynthesis has no relationship with the reactants and products of cellular respiration.
B. The products of cellular respiration are the reactants of photosynthesis.
C. The reactants of photosynthesis are the reactants at cellular respiration.
D. The products of cellular respiration are the products of photosynthesis.
The correct response regarding the relationship between photosynthesis and cellular respiration is option B. The products of cellular respiration are the reactants of photosynthesis.
Photosynthesis and cellular respiration are two essential processes in autotrophs. These processes are opposite to each other as photosynthesis is an anabolic and respiration is a catabolic process.
In photosynthesis, carbon dioxide and water are reactants that are combined to form glucose. Light energy is stored in chemical energy in this process. In cellular respiration, glucose is oxidized in presence of oxygen and produces water and carbon dioxide as products, and releasing ATP is released as the source of energy.Thus, the correct answer is - option B. The products of cellular respiration are the reactants of photosynthesis.
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A cow has alleles for both black and
white fur that are codominant. What
would be the resulting appearance
of the cow?
A. a solid coat of gray fur
B. fur with areas of both black and white
C. it is impossible to determine
Answer:B
Explanation:
Codominant is when neither allele is recessive so they are both expressed in the phenotype
A cow having the codominant alleles for both white and black fur will appear to have fur with areas of both black and white fur. This is an example of co-dominance where both alleles are expressed in the different parts of the animal. So option B is correct.
What is codominance?In codominance, two different versions of a gene are expressed separately and they are expressed equally in different parts of the organism. As a result, the traits of both alleles are expressed simultaneously. The term co-dominant means that both alleles are dominant and one allele does not mask the expression of the other.
Co-dominance can easily be spotted in plants and animals. Codominance is observed in some traits that are less visible like blood type. The A and B alleles are codominant and they can be expressed simultaneously.
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What is the difference between ventilation, gas exchange and cell respiration?
5 facts about the L.A. flood of 1938
I will give you all my points!
Answer:
1. The Los Angeles flood of 1938 was one of the largest floods in the history of Los Angeles, Orange, and Riverside Counties in southern California.
2. The flood was caused by two Pacific storms that swept across the Los Angeles Basin in February-March 1938 and generated almost one year's worth of precipitation in just a few days.
3. The Los Angeles, San Gabriel, and Santa Ana Rivers burst their banks, inundating much of the coastal plain, the San Fernando and San Gabriel Valleys, and the Inland Empire.
4. Flood control structures spared parts of Los Angeles County from destruction, while Orange and Riverside Counties experienced more damage.
5. It caused $78 million of damage ($1.42 billion in 2019 dollars),[2] making it one of the costliest natural disasters in Los Angeles' history.[3] In response to the floods, the U.S. Army Corps of Engineers and other agencies began to channelize local streams in concrete, and built many new flood control dams and debris basins
Explanation:
can you please help me!?
Answer:
You need to compare the location of bands for X and X's child. X is the mother, so the child will have half of all its bands from its mother, and the other half must be from the father. Some bands that X and X's child have in common are at around 185bp and 130bp (it is difficult for me to determine the exact position). Then look at the bands which X and X's child do not have in common. Those bands must have come from the father. So now you compare the remaining bands to all the bands of Megabucks and see if they match up. You can see a band at around 60bp that the child has. The mother did not have this band, so it must have come from the father. Megabucks does not have this band, so he is not X's father.
Explanation:
I hope this has helped you a little. The main thing to know is that a child's bands come from their mother and father, so if half the bands match up to the mum, the other half have to match up to some of the father's bands. But a child will never have the same set of bands as one of their parents - it will be a mix of both parents' bands.
ill give you 100 points and brainliest
Answer:
I know it is A stating a range of movement possible at each type of joint.
Explanation:
100% sure and please give brainliest
Answer:
my answer got deleted so I'm going to it again I think it's A.
Explanation:
Helpppppppppppppppppppppp ! Its Not Hard
Answer:
cytoplasm, dna ,cell membrane
Explanation:
Hey I'm Chloe Can you help me, Thanks :)
What is it called when the movement of heat through a liquid or a gas; warm rises and cool sinks?
Answer:
convection
Explanation:
Convection is the transfer of heat by the movement of a fluid (liquid or gas) between areas of different temperature. I hope this is correct :)
What is the unknown substance? Be sure to explain how you know
Answer:
The last one
Explanation:
All other substances use their chemical name, not a generic name like the last one
5. Observe: Increase the Sim. speed by two levels. Click Play, and wait for a while. What occurs as ume goes by?
your question not correct
A glass is sitting on a table and does not move. Explain
the forces acting on the glass that does not allow it to move.
Use "net force" in your explanation.
Explanation:
For a stationery object on a surface, two forces are acting on the body, the weight of the object acts downward, and the reaction force of the table acts upward, thus following Newton's third law of motion. Also, since it's stationary, the net force is equal to zero
Explain the protective significance of chromosomes condensing into tight coils during mitosis.
Answer:
Chromosomes condense before mitosis to allow them the ability to move smoothly, without becoming entangled and breaking. (So, they are conveniently packaged for cell division, in which the chromosomes must move to both poles of the cell.)
Explanation:Otherwise it would be a mess as they get tightly packed
Some bacteria of the same species and genotype can reduce sulfur anaerobically for energy, depending on the environment. This
an example of...
A)growth and response
B)genotype mutation
C)phenotypic plasticity
D)inclusive fitness
Answer:
C) phenotypic plasticity
Explanation:
The ability of an organism to change phenotypically according to environmental conditions is known as Phenotypic plasticity.Organisms might adjust their morphology and physiology to a better performance in environmental heterogeneity.
Generalists species might present a higher magnitude of phenotypic plasticity than specialist species.
Sulfur-reduction bacteria are obligated anaerobic microorganisms, that are metabolically versatile. They might grow either as heterotrophs using organic molecules or as autotrophs using hydrogen and carbon dioxide.These bacteria are notoriously adaptable and might be found in many different environments (terrestrial and/or aquatics) where there is no oxygen due to aerobic decomposition of the organic matter.
They can be found in anoxic sulfuric environments. In the soil, in estuaries mud, in freshwater, in sewage systems, salty waters, thermal water, sulfur deposits, in oil and gas wells, and even in animals and insects intestine.
What causes diffusion? *
Answer: Diffusion occurs due to the random movement of particles. It usually happens due to a concentration gradient, meaning that molecules move from an area of high concentration to an area of lower concentration.
Explanation:
Answer:
first option
what economic benefits does species diversity provide for humans?
Answer:
Food production relies on biodiversity for a variety of food plants, pollination, pest control, nutrient provision, genetic diversity, and disease prevention and control. Both medicinal plants and manufactured pharmaceuticals rely on biodiversity
c) combines the isolated gene of one organism with the DNA of a different organism. (1 point)
Answer: Recombinant DNA is the correct answer
Answer:
Recombinant DNA
Explanation:
The muscle cells of an elephant contain 62 chromosomes. How many chromosomes are in an elephant egg cell?
Answer:
There are 23 chromosomes in an elephant egg cell.
Hope it helps!
Elephant egg cell has 31 chromosomes which is a result of meiosis.
What is chromosomes?"Chromosomes are structures found in the center (nucleus) of cells that carry long pieces of DNA."It contains genes (hereditary unit).What is meiosis?It is a type of cell division which occurs in reproductive cells."It reduces the number of chromosomes in the parent cell(2n) by half(n) and produces four gamete cells(each having n chromosomes)."Elephant parent cell has 62 chromosomes after meiosis gametes have 31 chromosomes.
Hence, 31 chromosomes are present in elephant egg cell.
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What is the word equation for photosynthesis?
Answer:
The photosynthesis equation is as follows: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen.
Which star has the greatest luminosity?
A)
Barnard's star
B)
Procyon
C)
Alpha Centauri
D)
Rigel
Answer:
c
Explanation:
Rigel, also known as Beta Orionis, is the star with the greatest luminosity. Therefore option D is correct.
It is a blue supergiant and one of the brightest stars in the night sky. Luminosity refers to the total amount of energy radiated by a star per unit of time.
Rigel's immense luminosity is a result of its massive size and high surface temperature. It is located in the constellation Orion and is approximately 860 light-years away from Earth.
Rigel's brightness and luminosity make it a prominent and significant celestial object, visible even to the eye, and it plays a vital role in the constellation's distinctive appearance.
Therefore option D is correct.
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Which type of mutation is shown here?
Original: A T A C A C
Mutant : T T A C A C
A.translocation
B.non-disjunction
C.frameshift
D.point
Answer:
d
Explanation:
that is an example of a point mutation. A point mutation is a mutation that causes only one nucleotide to change and in the example adenine changes to thymine
hope this helps (:
The mutation shown here is point mutation.
What is mutation?"A changes/alteration in nitrogenous bases sequence of DNA that can results in changes in the genotype and phenotype of an organism is known as mutation."It occurs due to: deletion, insertion, translocation and inversion.During insertion, an extra nitrogenous bases are added to the DNA sequence.During deletion, a nitrogenous bases are removed from the DNA sequence.During inversion, the sequence of nitrogenous bases gets inverted in a DNA strand.In translocation, a sequence of one DNA strand breaks off and attaches to another DNA strand.What is point mutation?"A point mutation occurs in a genome when a single base pair is added, deleted or changed."Here, the sequence of original strand is A T A C A C and the sequence of mutant one's is T T A C A C. The base A is changed into base T.
Hence, the correct option is: D. Point mutation.
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NEED HELP QUICK PLSSSS
Answer:
I didnt really know how to put it into words, so I filled in your chart for you. Hope you like it and that I was not too late in completing this.
orange: frontal lobe
blue: parietal lobe
green: temporal lobe
yellow: occipital lobe
the cerebellum is is white ball-like part
then the top box is the Pons while the bottom one is the brain stem
Explanation:
that's what I remember from my pltw class
help pls :’)
what are two ways people are trying to maintain biodiversity
Answer:
1.Support local farms. Regularly buying from small local farmers at stands or markets helps to keep dollars in the local economy and supports agricultural efforts to conserve biodiversity.
2.Habitat restoration.
Explanation:I look it up that what pop up
How is dna like a ladder
Explanation:
The structure of DNA can be compared to a ladder. It has an alternating chemical phosphate and sugar backbone, making the 'sides' of the ladder. ... These bases make up the 'rungs' of the ladder, and are attached to the backbone where the deoxyribose (sugar) molecules are located.
how does the mother’s body cycles through labor rhythmically
Answer:
One theory about what triggers labor is that the mother's body, specifically her pituitary gland, begins to secrete oxytocin when the baby is fully developed and ready to be born, according to Medical News Today. Oxytocin is the hormone that stimulates contractions, reading the cervix for labor.
Explanation:
This is all I know.
Hope it helps!!~