R, S, and T always have the same percentage composition, while X, Y, and Z always have the same percentage composition. Chargaff's rule is then a viable theory that can be used in this situation.
The DNA of any species of any organism must have a 1:1 stoichiometric ratio of the purine and pyrimidine nucleotides, according to Chargaff's principles. More specifically, the ratio of guanine and adenine to cytosine and thymine must be the same. This pattern is present in both the strands of the DNA.The formula comes as A + G = T + C = 1In this universe there are six base pairs R,S,T,X,Y and Z. composition of R,S and T is always same thus these can be considered the purines.The percentage composition of X,Y and Z is always the same thus these can be considered the pyrimidines.applying Chargaff's rule to these bases:R + S + T = X + Y + Z
= 1:1
Thus, the nucleic acid will contain six base pairs where bonds are formed between RX, SY and TZ.
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Which of these provides evidence of the common ancestry of all life?
A.Ubiquitous use of catalysts by living systems
B.Near universality of the genetic code
C.Structure of the nucleus
D.The flow of genetic information from DNA to RNA to protein
E. The directionality of protein synthesis
Answer:d
Explanation:
The organism is made of genetic material that it inherits from the parent cell. The universality of the genetic code provides evidence of the common ancestry of all life. Thus, option B is correct.
What is a genetic code?A genetic code is a triplet of nucleotides that are also defined as codons that characterizes a specific amino acid produced through the process of translation. It consists of the DNA or RNA as the base that forms the codons.
The codons have been unambiguous for a type of amino acid it codes, universal for all living organisms irrespective of the kingdom, and redundant. They are crucial evidence that supports the common originality theory of organisms.
Therefore, option B. the universality of the genetic code is evidence that supports the theory of common ancestry.
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Can diffusion and osmosis take place at the same time?
Answer:
yes
Explanation:
8
Two women gave birth in the same hospital on the same afternoon. Their babies were taken
away, and then brought back to them one hour later. One of the women was worried that
she had been given the wrong baby. She asked for blood tests to be carried out. The hospital
found that she was group A and her husband was group O. The other mother was group
AB and her husband was group A. The woman with blood group A had been given the baby
with blood group O. The woman with group AB was given the baby with blood group B. Use
genetic diagrams to determine whether the women had been given the right babies.
Answer:
Explanation:
If the Husband of Woman One had group O blood, than It would be hard for Woman 2's baby to have group O blood, because the Parents of Baby 2 are AB and A. So the hospital did give the woman the right babies
Answer:
They were given the right baby cause the women who was worried her husband was group o and the baby they got was group o and the other women had a child with group b and her blood was a and b so yes it’s correct
Explanation:
What type of cells are undifferentiated, but can come specialized
Answer:
Stem cells
Explanation:
|| isolated from embryos or from adult tissue || are immature progenitor cells with the capability to differentiate into a variety of specialized cells that form tissues and organs ||
How would you describe Lysine? (Select all that apply)
a. It is a fairly large amino acid
b. It is a relatively small amino acid
c. It is flexible
d. It is very rigid
e. It is polar (partial charges only)
f. It is nonpolar
g. It is fully charged
Answer:
Lysine is one of nine essential amino acids in humans required for growth and tissue repair, Lysine is supplied by many foods, especially red meats, fish, and dairy products. Lysine seems to be active against herpes simplex viruses and present in many forms of diet supplements.
Explanation:
Which graph best represents directional selection?
Original population
Onginal population
Original population
Population
after
selection
Population
after
selection
Proportion of individuals
Population
after
selection
Trait Value
Trait Value
Trait Value
Graph A
Graph B
Graph C
COMPLETE
Answer:
Explanation:
I can't help you I can't see the graph
Explanation:
There you go its a for me not b
Question 7 of 10
Our ability to be conscious of some aspects of our environment while
ignoring others is called:
A. the conscious mind.
B. the two-track mind.
C. selective attention.
O D. preconscious attention.
SUBMIT
Selective attention is our ability to be conscious of some aspects of our environment while ignoring others. Therefore, the correct statement is option C.
What is selective attention?
Selective attention is the ability of our mind to be conscious of some aspects while ignoring others. In selective attention, our mind focuses on a certain aspect of the environment and filters out the rest of the aspects. Selective attention is useful as it allows one to focus only on the useful information and responds to an important stimulus in an environment.
Selective attention can be affected by various factors such as our dedication to particular interests and goals. For example, while we are driving in heavy traffic, we will only focus on the potential hazards and ignores all the other information, such as education, career, etc.
Selective attention involves top-down and bottom-up processing. Top-down processing involves the use of information, such as knowledge, goals, etc. to retain our attention, while bottom-up processing involves the use of sensory information to capture our attention.
Therefore, selective attention is our ability to focus on only certain aspects of the environment.
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1pt Salts dissociate into component ions when placed in
A. a flame.
B. a basic solution.
C. a neutral solution.
D. water.
Answer:
D. Water
Explanation:
the covalent bonds of water are stronger than the ionic bonds in the salt molecules so they dissolve.
You are trying to find which wavelength of light would allow algae to do photosynthesis the worst (you want to prevent algal growth in your pond). Describe your experiment setup:
hypothesis (1 point)
independent variable (1 point - you can choose anything)
dependent variable (1 point) and how you will measure the dependent variable (1 point)
variables you will keep constant (1 point)
Answer:
The light reactions of many algae differ from those of land plants because some of them use different pigments to harvest light. Chlorophylls absorb primarily blue and red light, whereas carotenoids absorb primarily blue and green light, and phycobiliproteins absorb primarily blue or red light. Since the amount of light absorbed depends upon the pigment composition and concentration found in the alga, some algae absorb more light at a given wavelength, and therefore, potentially, those algae can convert more light energy of that wavelength to chemical energy via photosynthesis. All algae use chlorophyll a to collect photosynthetically active light. Green algae and euglenophytes also use chlorophyll b. In addition to chlorophyll a, the remaining algae also use various combinations of other chlorophylls, chlorophyllides, carotenoids, and phycobiliproteins to collect additional light from wavelengths of the spectrum not absorbed by chlorophyll a or b. The chromophyte algae, dinoflagellates, cryptomonads (class Cryptophyceae), and the class Micromonadophyceae, for example, also use chlorophyllides. (Chlorophyllides, often incorrectly called chlorophylls, differ from true chlorophylls in that they lack the long, fat-soluble phytol tail that is characteristic of chlorophylls.) Some green algae use carotenoids for harvesting photosynthetically active light, but the Dinophyceae and chromophyte algae almost always use carotenoids. Phycobiliproteins, which appear either blue (phycocyanins) or red (phycoerythrins), are found in red algae and cryptomonads.
Explanation:
sana makatulong
2. How does a generator create current?
It is important to understand that a generator does not actually 'create' electrical energy. ... This movement creates a voltage difference between the two ends of the wire or electrical conductor, which in turn causes the electric charges to flow, thus generating electric current.
Please help me I will offer brainliest.
Answer:
NASA using aeroplanes.
Explanation:
I think its only NASA.
The purpose of "crossing over" is
A. to add genetic diversity
B to pull the chromosomes away from each other
C to make identical copies of the parent cell
D to help dissolve the nuclear membrane
A student is studying the amino acid sequence of a protein shared by four organisms. The student wants to know which organism is most closely related to organism A. The student has data that shows the number of amino acid differences between organism A and each of the other organisms. Study the data in the chart. Organism Number of Difference in Amino Acid Sequence from Organism A B 3 C 5 D 1 Which organism does this data suggest is most closely related to organism A? C B D
Answer:
it's D i just took the test
what are the similarities between a grasshopper and a toad
Well the similarities between them is that both are unicellular organisms... both of them do digestion process as well as excretion i.e perform metabolic axtivites..
both of them are part of eco system and as well as food chain...
and the most funny pne they produve sound by vibrating their vocal chord
Does soy milk have lactose?
Answer:
Because it comes from plants, soy milk is naturally free of cholesterol and low in saturated fat. It also contains NO lactose. Soybeans and soy milk are a good source of protein, calcium (when fortified), and potassium.
Answer:
no it doesn't have lactose
Explanation:
because it comes from plants it's naturally free of cholesterol and low in saturated fats.
Which of the following decreases the population size?
a. favorable light and temperatures
b. adequate food supply
c. unable to compete
d. able to migrate, hide, or defend
e. able to resist disease
Explanation:
able to migrate,hide or defend
define dorsiventral leaf
A dorsiventral leaf, also known as a bifacial leaf, is a type of leaf structure characterized by having distinct upper and lower surfaces with different functions and structures.
The upper surface of a dorsiventral leaf is called the adaxial surface, while the lower surface is called the abaxial surface. The adaxial surface is usually dark green and is exposed to more sunlight, while the abaxial surface is typically lighter in color.
This structural asymmetry allows for efficient photosynthesis on the upper surface while minimizing water loss through stomata on the lower surface.
Dorsiventral leaves are commonly found in dicotyledonous plants and contribute to their overall shape and function in terms of light absorption, gas exchange, and transpiration.
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Why is diffusion such an efficient process
for all cells?
A. It does not require energy.
B. It occurs so quickly.
C. The high amount of energy used during diffusion is offset by
the amount it creates.
Answer:
A.
Explanation:
Diffusion does not require energy. It's depends on the concentration gradient of the two molecules.
Diffusion is such an efficient process for all cells because it does not require energy. Thus, the correct option is A.
What is Diffusion?Diffusion may be defined as the migration of substances from a region of higher concentration to a region of lower concentration through a semi-permeable membrane.
Diffusion does not require any type of energy for the movement of ions, molecules, or substances. It is a very feasible form of migration of substances.
Diffusion is a type of passive transport and hence takes place in a dropping manner without any expenditure of energy.
Therefore, Diffusion is such an efficient process for all cells because it does not require energy. Thus, the correct option is A.
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Describe environmental and health problems caused by polluted air.
Answer:
long terms lung disease and heart problems
Explanation:
structures of bacterial cells.
what are the major macromolecule for Capsule, gram-positive cell wall, endospore, pilus, fimbriae, plasmid, plasma membrane, and ribosomes?
Answer:
Explanation:
Bacteria capsule contain poly-γ-d-glutamic acid and also possesses antiphagocytic properties .
Gram positive cell wall peptidoglycan.
Fimbriae contain adhesin which make them to attach to a base and counter shear force and obtain food.
Pili contain oligomeric proteins which is hair like structure.
Endospores consists of DNA, ribosomes and dipicolinic acid.
RIBOSOMES consist of ribosomal RNA and proteins.
Plasmid consist of circular DNA.
Plasma membranes consist lipid bilayer.
When a roller coaster is at the bottom of the hill it has
a. Potential energy
b. Kinetic energy
c. Both Potential and Kinetic Energy
d. Chemical energy
Place the following images in the chronological order that represents the process of pollination.
Question 4 options:
2, 3, 1, 4
3, 2, 4, 1
1, 2, 3, 4
2, 3, 4, 1
Answer:
2341
Explanation:
I assume this is the answer. I hope it helped you
Pollinization is the transference of pollen grains to the stigma. Fertilization occurs when pollen grains move to the ovary and gametes meet. Option D. 2,3,4,1
What is pollinization?
Pollinization is the pollen transference from the masculine organs to the feminine organs of the flower. It might involve the same flower or different flowers, the same plant or different plants.
What are the Feminine reproductive structures?The central structure is known as a carpel, also recognized as the pistil.The base of the carpel forms the ovary, in which the eggs are produced and where the zygote develops.The opposite extreme of the carpel is the stigma, in the superior part. The stigma is a sticky surface where the pollen grains get attached.The style is the filament structure that connects the ovary and the stigma.What are the Masculine reproductive structures?The pollen grains, or male séx cells, are produced in the stamens.The stamen has an anther where the pollen is produced, and a filament that provides support.What is fertilization?Fertilization is the gamete fusion, which involves the mature germinated pollen grain and the ovule.
During fertilization
1) The mature pollen grains are driven to the stigma of the same flower or other flowers of the species, where they stick.
2) Once in the stigma, the pollen grain germinates.
3) A thin structure named pollinic tube forms. It goes from the stigma along the style and ends in the flower ovary.
4) The pollen grains move along the tube forward to the ovary, where they meet the egg and fertilize.
5) Once in the ovary, the pollen grains get in touch with the ovule. They have double fertilization.
6) The zygote develops in the ovary.
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According to this framework, the correct option is d) 2, 3, 4, 1
Volcanic eruptions can — (1 point)
O draw animals to the area.
O add nutrients to the surrounding soil.
O increase biodiversity.
O drastically alter the ecosystem.
Answer:
Add nutrients to the soil
Explanation:
Plants are destroyed over a wide area, during an eruption. The good thing is that volcanic soil is very rich, so once everything cools off, plants can make a big comeback!
Hope it helped!!!
Answer: Drastically alter the ecosystem
Explanation:
I took the quick check
Which of the following is transported throughout the body by the circulatory system?
What technique do forensic scientists use to make more DNA?
Answer:
Explanation:
Rather than use X-ray-based gel electrophoresis, today's forensic scientists measure the size of DNA fragments with a technique called capillary electrophoresis. Small fragments travel more quickly than large fragments through a gel-like material.
Popcorn and potato chips are two of the most popular snack foods. One serving of the typical microwave popcorn and one serving of regular potato chips provide about the same amount of calories. However, one serving of popcon is 4 cups, while a single serving of chips is only about a cup. A group of biology students decides to explore the question of whether the type and amount of a snack a person eats affects how much they eat at their next meal using popcom and chips as the snacks. Which of the following hypotheses could address this question?
A. People who consume one serving of chips eat the same volume of food at their next meal as people that have one serving of popcom for a snack.
B. Consuming one cup of chips as a snack decreases the number of calories a person consumes at their next meal more than a snack of one cup of popcom.
C. Eating one serving of popcorn reduces the volume of food a person consumes at their next meal more than eating one serving of chips
D. People who consume 4 cups of popcom as a snack eat more calories at their next meal than people who eat 4 cups of chips as a snack
E. All of the above
Answer:
c
Explanation:
Do you think the human species is part of the Earth’s ecosystem?
Answer:
I think that humans would be part of the ecosystem because we produce carbon dioxide for plants, and without carbon dioxide, plants couldn't function. (This is just my opinion on the matter, but if this was a test question, I'd say yes.)
Explanation:
Answer:
Hmmm that's a tough question. In my opinion I believe that they are because they some of us choose to have a role in the ecosystem by helping the Earth become more "green". Maybe think about this, how did we end up here on Earth? (This might go against your science class but we ended up here because God created us all.) I don't know if this helped but I hope that it did. I apologize if it didn't.
White flower color is recessive to purple flower color in pea plants. If a pea plant has white flowers, what is
the genotype and phenotype of the pea plant
Answer:
An organism's genotype is its specific combination of alleles for a given gene. So, for example, in the pea plants above, the possible genotypes for the flower-color gene were red-red, red-white, and white-white. The phenotype is the physical manifestation of an organism's allelic combination (genotype).
Explanation:
hope this helps sorry if it doesn't have a good rest of your night :) ❤
The genotype and phenotype of the pea plant - pp - white flower
According to Mendel, there are two or more alleles (normally two) are responsible for the expression of a trait encoded by the gene.
One allele of the particular gene has the ability to mask the phenotypic expression of the other if present in a genotype together.The allele that masks another is called the dominant allele while the allele being masked is the recessive allele.The recessive allele express their effect only if they are present with the same allele in the genotypeIn this case, a gene that codes for flower color in pea plants is involved.The purple allele (P) is dominant over the white allele (p).It is given that the pea plant has white flower color that is a recessive allele therefore, it is clear that it has two recessive alleles p in its genotype.Thus, the genotype and phenotype of the pea plant - pp - white flower
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Macronutrients can be stored by the body for later use when it enters into the fasted state.
a. True
b. False
Answer:
a. True
Explanation:
The statement being made is true. The Fasted State is where our bodies draw from glycogen and fat reserves in order to create energy. This happens only when we do not eat that we enter into this state. The body first needs to draw all the energy it can from the glycogen stores and then once that is depleted it then begins to draw from fat stores for energy. Using all the stored macronutrients and turning them into energy to sustain the body.
How do bird bones and mammal bones differ?
Answer:
The answer is that bird bones are denser than mammal bones, which makes them heavy even though they are thin and sometimes even hollow.
Explanation:
Hope This Helps!!
(brainliest please, if possible)
Answer:
The answer is that bird bones are denser than mammal bones, which makes them heavy even though they are thin and sometimes even hollow.
Explanation:
What this means is that the birds bone are made for flight. That is the reason that they are more dense.
Hope this helps =)