To create a knockout mouse, after introducing to ES cells a DNA construct in which a specific gene is mutagenized by the insertion of a drug resistance marker, the cells, that have incorporated the transgene by homologous recombination grow in the presence of the drug and these are injected into a host blastocyst. The correct option is A.
What is biological marker?A biomarker is an objective measure of what is going on in a cell or organism at any given time. Biomarkers can serve as health-related early warning systems.
To create knockout mice, researchers insert artificial DNA into the chromosomes contained in the nuclei of ES cells using one of two methods.
Both methods are performed in vitro, that is, on cultured cells grown in a laboratory setting.
After introducing a DNA construct into ES cells that mutagenizes a specific gene by inserting a drug resistance marker, the cells that have incorporated the transgene via homologous recombination grow in the presence of the drug and are injected into a host blastocyst.
Thus, the correct option is A.
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In order to conserve resources, Evelyn uses her old homework as scrap paper
and never throws away paper with writing only on one side,
What kind of conservation is Evelyn practicing?
A. Recycling
B. Waste
C. Renewal
D. Reuse
Answer:
Evelyn is using reuse as a form of conservation
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A species of reef fish,living in ideal conditions,has a new generation of offspring every three months. In the new generation,approximately 200 new fish are added to the population of 10,000 fish.
Answer:
.02
Explanation:
Which statement accurately describes a phyroclsstic flow
Answer:
Pyroclastic flows, which consist of basaltic lava infused with incandescent ash and lava fragments, can reach many miles away from their sources because they are nearly frictionless and are driven by gravity.
Explanation:
which part control one direction transmission of impulses
Definition of respiration
a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances
Answer:
A process of oracajsjsjsjsjsjjss
Explanation:
Nithingbs lol just for poimts
What are the possible blood types of children in the following families?
(a) Type A mother, Type A father
(b) Type A mother, Type AB father
(c) Type AB mother, Type AB father
(d) Type A mother, Type B father
Answer:
a) A and O
b) A , B and AB
c) A, B and AB
d) A, B , O and AB
Explanation:
Select all the correct
Images.
Select the atomic models that belong to the same element.
Answer:
Theres no image
Explanation:
F-R-E-E P-O-I-N-T-S FOR EVERYONE
Answer:
K- T-H-A-N-K-Y-O-U
Explanation:
:))))
Letter A represents a wave's _____.
A. wave height
B. crest
C. wavelength
D. trough
Explain how ocean temperatures affect the climate of coastal cities.
Answer:
Explanation: Warm ocean currents heat the air above the water and carry the warm air to the land, increasing the temperature of the coastal region. The same is true for cold ocean currents, except that they carry cooler air to the land and lower the temperatures of the coastal region.
Answer:
Warm and cold ocean currents can influence coastal climate, but only when local winds come in from the sea. Warm winds heat the air over the ocean, causing temperatures to rise over land. Cold currents will cool the air and add cooler temperatures to the land.
Explanation:
Flower color in the garden pea is due to two interacting genes, A and B. If either gene is recessive (aaB_, A_bb, or aabb) then the phenotype is white. A dominant allele must be present at both genes for flower color to be purple. After a testcross of an individual with a genotype of AaBb, what proportion of the progeny will have purple flowers
Answer:
4/16 = 1/4 = 25% of the progeny is expected to be purple (AaBb)
Explanation:
Available data:
Flower color in the garden pea is due to two interacting genes, A and BaaB_, A_bb, or aabb ⇒ white flower A dominant allele must be present at both genes for flower color to be purpleAABB, AaBb ⇒ purple flowerCross:
Parentals) AaBb x aabb
Gametes) AB, Ab, aB, ab
ab, ab, ab, ab
Punnett square) AB Ab aB ab
ab AaBb Aabb aaBb aabb
ab AaBb Aabb aaBb aabb
ab AaBb Aabb aaBb aabb
ab AaBb Aabb aaBb aabb
F1) Genotype:
4/16 = 1/4 = 25% of the porgeny is exected to be AaBb4/16 = 1/4 = 25% of the porgeny is exected to be Aabb4/16 = 1/4 = 25% of the porgeny is exected to be aaBb4/16 = 1/4 = 25% of the porgeny is exected to be aabbPhenotype
12/16 = 3/4 = 75% of the progeny is expected to be white(Aabb + aaBb + aabb)4/16 = 1/4 = 25% of the progeny is expected to be purple (AaBb)How can friction be lessened?
A). Add less force
B). Add more force
C). increase the speed
D). add wheels
Does a virus have DNA, RNA, or both to carry its genetic material
Answer:
it was one of either it depends so Both
Explanation:
Why is this flower able to self-pollinate?
O A. It has a pistil and anthers.
O B. It has stamens and anthers.
OC. It has a pistil and an ovary.
OD. It has stamens and an ovary.
Answer:
B
Explanation:
Why are members of the Kingdom Plantae important to members of other kingdoms?
Answer:
C
Explanation:
Plants have the unique ability of photosynthesis. this gives off oxygen to all other organisms
For the human population to increase in size, what must exceed the death rate?
birth rate
mortality
limiting factors
carrying capacity
Answer:
carrying capicity
Explanation:
the carrying capacity is the amount of species or organisms that can live in a given environment without altercations. So the carryong capicity would have to increase so that more organisms can occupy the given space.
Answer: Birth Rate
Explanation:
Which is true about the tundra biome?
a. It receives less direct sunlight than any other biome on earth.
b. It has more trees than any other biome on earth.
c. It can be found at low elevations all over the earth.
d. It has more types of plants and animals than any other biome on earth.
Explanation:
The answer is A. It receives less direct sunlight.
Answer:
For the fisr question it is A it recives less direct sunlight than other biomes .
For the secound question it is B because the source is warmer.
Explanation:
i hope this helped
15) Study the food web, What conclusions can be drawn from analyzing this food web?
l. All the energy contained within the organisms in the web comes from the sun.
II. The energy from the caterpillar is transferred to the plant.
lll. The hawk is the top predator.
IV. Energy is transferred from organism to organism in this food web,
V. The bunny is the organism that harnesses the energy from the sun.
A) I only
B) III and IV only
C) I, III, and IV only
D) II, III, and V only
Answer:
C) I, III, and IV only
Explanation:
l. All the energy contained within the organisms
lll. The hawk is the top predator.
IV. Energy is transferred from organism to organism in this food web,
Earthquakes occur along the San Andreas Fault. Which is an example of this type of plate boundary
female reproductive system (side view)
Answer:
.................................
Describe the pattern of inheritance that is most likely associated with a mutation in the MT-ND5 gene. Explain why individuals are not typically heterozygous with respect to mitochondrial genes.
Answer:
this gene is a mitochondrial gene and therefore it is maternally inherited
Explanation:
The MT-ND5 gene is a gene of the mitochondrial genome that provides instructions for synthesizing a protein called NADH dehydrogenase 5, which is part of the complex I (the first enzyme of the respiratory chain). In most multicellular organisms, the mitochondrial DNA (mtDNA) is inherited from the mother (i.e., maternally inherited), whereas nuclear DNA (i.e., nuclear genome) is inherited equally from both parents. For example, mitochondria in human sperm are usually destroyed after fertilization. In consequence, mitochondrial mutations are transmitted by maternal inheritance, and individuals, therefore, cannot be heterozygous for mitochondrial genes.
The pattern of inheritance that is most likely associated with a mutation in the MT-ND5 gene is
MT-ND5 is a mitochondrial genome coded gene responsible for the protein NADH-ubiquinone oxidoreductase chain V protein (ND5). ND5 is a sub-unit od NADH dehydrogenase, a mitochondrial protein. The mutant MT-ND5 will be transferred to the progeny via maternal mitochodral mtDNA.Individuals are not typically heterozygous with respect to mitochondrial genes because
Heterozygousity of alleles of a particular gene arises due to contribution of both maternal and paternal genes. This is what happens for nuclear chromosomes. Mitochondria is an organelle that contains its independent genome. Only maternal mitochondria gets selected and thus are successfully transferred to the next generation post fertilization.For more information on MT-ND5 gene
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a chemical reaction that removes electrons from an atom is call a blank reaction
Answer:
answer is b: oxidation reaction
Answer:
oxidation reaction
Explanation:
DNA and RNA are made of what 3 part structure?
1)nucleotide
2)codon
3)amino acid
4)nucleic acid
Answer: nucelotide
Explanation: Rna and dna are made up from nucelotides, they each have a five carbon sugar backbone, a nitrogen base and a phosphate group
What is the difference between genetic drift and natural selection?
Genetic drift is the random increase or decrease of certain genes in a population; natural
selection is not random.
Genetic drift is the selection of random traits in a population; natural selection is the
selection of specific traits.
Genetic drift is the frequency of genes in a population; natural selectic is the frequency
of adaptations in a population.
Genetic drift is the change in a population's genes over time; natural selection is the
evolution of a population over time.
how the cardiovascular, respiratory and digestive systems work together to provide cells with the raw materials they need to ensure healthy cell function
Explanation:
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
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Why is it more difficult for top carnivores to obtain sufficient energy resources than it is for animals lower on the food chain?
the trophic pyramid is the reason
what the trophic pyramid is: Trophic pyramid, also called an energy pyramid, showing the progression of food energy. The pyramid base contains producers, organisms that make their own food from inorganic substances. All other organisms in the pyramid are consumers
- predators get little energy from the prey they eat so they must consume multiple prey
It is more difficult for top carnivores to obtain sufficient energy resources than it is for animals lower on the food chain because the higher trophic levels have less energy than the lower ones.
The trophic levels of food chainThe food chain is defined as a feeding pathway that consists of similar organisms that are placed in the same trophic levels.
Trophic levels in a food chain are those levels that is occupied by a group of organisms that have a similar feeding mode.
The plants which are the producers are at the lower trophic level while the carnivores are at the higher trophic levels.
The carnivores eats meat from other animals but not plant or plant products which obtain direct energy from sunlight.
Therefore, It is more difficult for top carnivores to obtain sufficient energy resources than it is for animals lower on the food chain because the higher trophic levels have less energy than the lower ones.
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Describe the preservation principle of salting
Salting, especially of meat, is an ancient preservation technique. The salt draws out moisture and creates an environment inhospitable to bacteria. If salted in cold weather (so that the meat does not spoil while the salt has time to take effect), salted meat can last for years.☜(ﾟヮﾟ☜) (⌐■_■)
Why does the earth have different layers?
Answer:
The earth has different layers because as it formed, the lighter parts (like continental crust) floated to the surface, and the really heavy parts (like iron and nickel in the core) sank to the middle. It is just like when you mix oil and water: the oil will float to the surface because it is lighter (or less dense) than the water.
1 pc
Which structure does the following picture represent? *
Nitrogenous base
O Nucleotide
O Deoxyribose
Please no links ty