Answer:
B.
Explanation:
B. is the standout of all the other choices. Apoptosis is basically the self-destruct mechanism for a cell, whether it be because it isn't needed or it was exposed to toxins and needs to break down. Apoptosis doesn't maintain the immune system at all.
Answer:
The answer is A
Explanation:
I just did it
Biodiversity can be studied at which of three levels?
Answer:
genetic diversity, species diversity, and ecosystem diversity.
Explanation:
Answer:
Biodiversity is usually explored at three levels - genetic diversity, species diversity and ecosystem diversity.
Explanation:
Frances hits a cue ball into a rack of billiard balls, sending the balls in many
different directions. After a few seconds, all the balls on the table stop
moving.
Answer:
Left and right
Explanation:
The genetic code is thought to have evolved to maximize genetic stability by minimizing the effect on protein function of most substitution mutations (single-base changes). We will use the six arginine codons to test this idea. Consider all of the substitutions that could affect all of the six arginine codons.
Part A How many total mutations are possible?
Part B How many of these mutations are "silent," in the sense that the mutant codon is changed to another Arg codon
Part C How many of these mutations are conservative, in the sense that an Arg codon is changed to a functionally similar Lys codon?
Answer:
The 4 codons that code for Alanine are :-
GCU ; GCC ; GCA ; GCG ;;
codon for Valine :-
GUU ; GUC ; GUA ; GUG
Part A. Total number of possible mutations are 36.
GCU
GCU --> GCC , GCA , GCG
GCU --> GUU , GAU , GGU
GCU --> UCU , CCU , ACU
GCC
GCC --> GCU , GCA , GCG
GCC --> GUC , GAC , GGC
GCC --> UCC , CCC , ACC
GCA
GCA --> GCU , GCC , GCG
GCA --> GUA , GAA , GGA
GCA --> UCA , CCA , ACA
GCG
GCG --> GCU , GCC , GCA
GCG --> GUG , GAG , GGG
GCG --> UCG , CCG , ACG
Part B. Silent mutations occur when the last base of the codon is substituted with other bases.
Thus, the Total number of silent mutations are 12.
Part C. Conservative mutations occur when the second base of the codon is substituted to a "U".
Thus, the Total number of conservative mutations is 4.
A rat population has an average weight gain between weeks 2 and 4 of 10 grams, and the narrow-sense heritability of the weight gain between 2 and 4 weeks is 25%. What average weight gain would be expected among the offspring of parents whose average gain was 15 grams?
Answer:
The correct answer is - 11.25
Explanation:
Given:
Average weight gain between weeks 2 and 4 = 10 grams
The narrow-sense heritability of the weight gain between 2 and 4 weeks
= 25%
Then
Average weight gain would be expected among the offspring of parents whose average gain was 15 grams-
by the formula:
Average weight gain between weeks + (h) (Average weight gain between weeks - parents average gain )
= 10 + 0.25 (15-10)
= 10 + 0.25 (5)
= 10 + 1.25
= 11.25
Thus, the correct answer is - 11.25
In an ecosystem, only 10% of the energy in one trophic level is transferred to the level above it. The rest of the energy is lost to the environment. If the first trophic level (green plants) contains about 250,000 kcal of energy, how much energy is lost when energy is transferred from lizards to snakes?
A.
2,250 kcal
B.
2.25 kcal
C.
225,000 kcal
D.
22.50 kcal
Answer:
B - 2,250 kcal
Explanation:
When transferred from lizards to snakes 2,250 kcal is lost due to only 10% of energy being transfeered to each tropic level, hence option a is correct.
How energy is transferred?
At any given trophic level, only 10% of the energy is transmitted to the next level the remaining 90% is primarily wasted as heat during metabolic activities.
The amount of energy transferred from one trophic level to the next is typically only about 10%, so 2,250 kcal energy is lost when transferred from lizards to snakes.
The number of trophic levels that an ecosystem can maintain, as well as the energy it can store, is constrained by what is known as the 10 percent rule.
Therefore 10% is transferred to the next trophic level, hence 2,250 kcal is lost when transferred from lizards to snakes.
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The Frank-Starling law of the heart states that stroke volume is proportional to ________.
Answer:
end diastolic volume
Explanation:
The Frank-Starling Law states that the stroke volume of the left ventricle will increase as the left ventricular volume increases.
What kind(s) of cells can develop from totipotent stem cells?
O A. Only cells that are identical to the original stem cell
B. Only cells that are closely related to the original stem cell
C. Any cells of the human body, but not cells of the placenta
D. Any cells of the human body or the placenta
Answer:
D.
Explanation:
Totipotent cells can make any of the 220 cell types in an embryo, as well as the cells found in a placenta!
Any cells of the human body or the placenta can develop from totipotent stem cells. Therefore, the correct option is D.
Totipotent stem cells have the unusual ability to differentiate into any type of human body cell, including placental cells. They have the ability to generate all types of cells, including endoderm, mesoderm, and ectoderm, the three basic germ layers. Because of their potential for development, totipotent stem cells can produce both extra-embryonic and embryonic tissues. Although cells produced from totipotent stem cells can differentiate into any cell type, due to maturation and specialization processes, they are not always identical to the original stem cell.
Therefore, the correct option is D.
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Which describes bedrock? consists of solid rock lies directly above the soil layer does not contain weathered rock forms from decomposed material
Answer:
consists of solid rock
Explanation:
Bed rock are solid rock material usually below the soil surface.
They are found at the ocean floor under sediment and other solid materials. Saprolite are bed rocks that have been weathered they are found above the bed rock overlaining it,
saprolite have different composition because it has gone through chemical weathering.
Above saprolite are soil and other loosed particle.
when the depth and structure of a bed rock is determined it help tell about the history of a place.
Answer:
a
Explanation:
In which would you be most likely to find plants and animals that are adapted to survive in extremely cold temperatures
This question is incomplete because part of the content is missing; here is the complete question:
In which biome would you be most likely to find plants and animals that are
adapted to survive in extremely cold temperatures?
A. Desert
B. Savanna
C. Rain forest
D. Tundra
The correct answer is D. Tundra
Explanation:
Tundra biome is one of the coldest biomes on Earth, indeed, the temperature in this biome can be as low -50° C in some zone. At this extremely cold temperature, animals and plants have adaptations to survive in these climatic conditions. For example, animals such as the arctic hare or the polar bear that are found mainly in the tundra biome have thick fur that helps them keep body temperature despite low temperatures in their environment. Thus, the biome in which you would most likely find species adapted to extremely cold temperatures is the Tundra.
ASAP Which of the following is true about DNA in a prokaryotic cell? A. Wound tightly in the nucleus. B. Connected to protein that help it condense. C. It is coiled into a genophore, but not inside a nucleus. D. Made of only a single strand instead of double.
Answer:
C. It is coiled into a genophore, but not inside a nucleus.
Hope this helps.
difference between plant and animal Glycolysis
Answer:
no difference
Explanation:
There is no difference between plant and animal glycolysis. Glycolysis is an important step of respiration and refers to the break down of glucose molecule for the generation of energy in the form of ATP. Both plant and animal glycolysis occurs in the cytoplasm of the cell where glucose molecule is broken down and produces 2 molecules of pyruvate and 2 molecule of ATP. This process occurs without the use of oxygen molecule.
QUESTION 9
The physical or psychological treatment that contains no active ingredient but produces an effect because the person receiving it believes it will is
called a
a. placebo
b. prescription
c. an anti-real pill
d. med
Answer:
A.placebo
Explanation:
......
.....................
..
One reason the skeletal system is important is because __________. A. without the skeletal system, an individual would not have enough calcium to live B. the skeletal system creates the connective tissue and tendons that allow the body to move C. the skeletal system is solely responsible for housing the body's immune system D. the skeletal system is responsible for controlling functions of the entire body Please select the best answer from the choices provided. A B C D
Answer:
b
Explanation:
One reason the skeletal system is important is because the skeletal system creates the connective tissue and tendons that allow the body to move, hence option B is correct.
What is skeletal system?The skeletal system is an arrangement of numerous components that cooperate to support your movement.
Your bones, which are solid objects that form the skeleton of your body, make up the majority of your skeletal system. The skeleton of an adult human has 206 bones.
Your body's skeletal system serves as a support system for it. It offers protection for organs, generates blood cells, gives the body its structure, enables mobility, and stores minerals.
Therefore, the skeletal system creates the connective tissue and tendons that allow the body to move.
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Which of the following is the muscle action that results in exhalation and causes the air pressure inside the lungs to be higher than outside the chest cavity?
a) Contraction of internal intercostals
b) Relaxation of the diaphragm
c) Contraction of the diaphragm
d) Relaxation of the external intercostals
Answer:
the correct option is: b) Relaxation of the diaphragm
Explanation:
During exhalation or exhalation ALL the muscles of the thorax cavities relax, unless it is a forced expiration there they will not be relaxed, but this is a voluntary and infrequent process.
The relaxation of the diaphragm is what generates an increase in intrapulmonary pressure and therefore it is forced to release its pressure by releasing air through the respiratory tube.
Although it is also valid to say that the internal intercostals are relaxed, since it is true! And it would also be considered as correct, but the diaphragm being a muscle of greater size and greater power generates a more significant effect on the exhalation, that is why it was decided to choose that as the correct option.
Answer:
Relaxation of the diaphragm
Explanation:
Below is a partial DNA sequence used to answer the following questions.
5' - TATGCAGCACATT - 3' 3' - ATACGTCGTGTAA - 5'
If transcription occurred from left to right, which strand is the template strand?
a. 3' - TATGCAGCACATT - 5'
b. 5' - TATGCAGCACATT - 3'
c. 5' - ATACGTCGTGTAA - 3'
d. 3' - ATACGTCGTGTAA - 5'
Answer:
d. 3' - ATACGTCGTGTAA - 5'
Explanation:
The template strand refers to the strand in which the mRNA is developed in the DNA strand as it involves the transcription for template
In the given situation, since there is a partial DNA sequence mentioned plus it the transcription has also occurred from left position to the right position i.e
5' - TATGCAGCACATT - 3'
So it would be
3' - ATACGTCGTGTAA - 5'
Hence, the correct option is d.
An athlete has an enhanced genotype for carbohydrate utilization, however they feel sluggish after they eat carbohydrates, which of the following should the trainer consider?
a. The type of carbohydrates being consumed
b. Decrease the carbohydrate intake
c. Add more caffeine to the daily diet
d. They are likely over trained and tired
Answer:
Carbohydrates’ bad reputation ignores the benefits they can offer
sooo i would say it is B. i think....
What is the name of this tree?
Answer:
pond apple..is the name of that tree.
In the active site of the enzyme lotzase, a mutation of lysine 132 toaspartic acid causes a loss of lotzase function. Lotzase is most catalytically active at pH 7. Which is the following is the best reason why this might occur?
a. a negative charge is needed for substrate binding.
b. a positive charge is needed for substrate binding.
c. a general acid is needed for catalysis to occur.
d. more than one of the following can be a good reason.
Answer:
B. positive charge is needed for substrate binding
C. a general acid is needed for catalysis to occur
Explanation:
A mutation of lysine 132 toaspartic acid causes a loss of lotzase function as a result of the enzyme lotzase being most catalytically active at pH 7( neutral).
This condition is however achieved under conditions such as a positive charge being involved in the substrate binding and a general acid being involved in the catalytic process.
_____ combines the isolated gene of one organism with the DNA of a different organism.
Answer:
A transgenic, or genetically modified, organism is one that has been altered through recombinant DNA technology, which involves either the combining of DNA from different genomes or the insertion of foreign DNA into a genome.
Explanation:
Answer:
Recombinant DNA
Explanation:
During the early stages of meiosis, two chromosomes in a homologous pair may exchane
segments, producing genetic variation in sex cells. This process of exchange is called
Select one:
a. crossing over
b. nondisjunction
c. transcription
O d. genetic shuffling
Check
Answer:
The answer is option A.
crossing over
Hope this helps you
An organism that carries on photosynthesis in each cell is called: 1.cactus 2.bacteria 3.coleus 4.algae
Answer:
Algae
Explanation:
Blue-green algae (which are prokaryotic) carry-out the photosythesis reactions in the cytoplasm.
Answer:
Algae! 67% Sure it's correct.
A portion of the linkage map of chromosome 2 in the tomato is illustrated here. The oblate phenotype has flattened fruit, peach results in hairy fruit (like a peach), and compound inflorescence means clustered flowers.
o(oblate) ci (compound inftluorescence) p (peach)
15 cM 20 cM
Among 1,000 gametes produced by a plant of genotype o ci +/+ + p, what types of gametes would be expected, and what number would be expected of each? Assume that the chromosome interference across this region is 80%.
Answer:
Expected gametes : o+ ci+ p+,o- ci- pi-, o+ci- pi+,o- ci+ pi-, o+ci+ pi-, o- ci- pi+
Explanation:
Genetic distance between genes is equal to the recombination frequency, so the total number of recombinant gametes can find out by multiplying the recombination frequency of both sides to the total number of gametes.
Interference= .80;
Coefficient of incidence
= 1 - 0.80
= 0.20
15cM = 15% recombination,
20cM = 20% recombination.
Then, Number of recombinant offspring
= 15 x1000/100
= 150,
Gametes expected= o+ ci+ p+,o- ci- pi-, o+ci- pi+,o- ci+ pi-, o+ci+ pi-, o- ci- pi+
Which is a disaccharide?
Answer:
Disaccharidases are glycoside hydrolases, enzymes that break down certain types of sugars called disaccharides into simpler sugars called monosaccharides. In the human body.
Explanation:
Disaccharide, also called double sugar, any substance that is composed of two molecules of simple sugars (monosaccharides) linked to each other. ... The three major disaccharides are sucrose, lactose, and maltose.
Three common disaccharides:
#sucrose — common table sugar = glucose + fructose.
#lactose — major sugar in milk = glucose + galactose.
#maltose — product of starch digestion = glucose + glucose.
A disaccharide is a sugar that can be created when two monosaccharides are linked together with glycosydic. Disaccharides are soluble in water and a few examples of this are; maltose, sucrose, and lactose. Finally, they’re also one of four chemical linkings for carbohydrates.
Best of Luck!
A woman with hemophilia and a man without hemophilia are expecting a baby boy. What are the chances that their son will also have hemophilia?
Answer:It’s a 50/100 chance
Explanation:
Rafael models a longitudinal wave using a coiled-spring toy. If he wants to model a longitudinal wave that carries more
energy, how should he move the end of the spring?
:::
O side to side, using larger motions
O side to side, using smaller motions
O forward and back along the spring, using larger motions
O forward and back along the spring, using smaller motions
Answer:
O forward and back along the spring, using larger motions
Explanation:
Longitudinal wave that carries more energy, he move the end of the spring by pushing the spring forward and backward directions using larger motion that creates two regions in the spring, the crowded area known as compression and more distance between parts of the spring known as rarefaction. If there is more compression in the spring so there is a lot energy present in the spring. So it is only possible when using larger motions in the spring.
Answer:
C
Explanation:
edge 2023
The diagram below shows some ocean floor features. (4 points) Which of these statements is correct about the feature labeled A in the diagram? a. It is an underwater basin caused by subduction. b. It is a deep trench located on both sides of a mid-ocean ridge. c. It is an area where sea floor spreading occurs. d. It is the portion of the ocean floor where old crusts are eroded.
Answer:
it is a deep trench located on both sides of a mid_ocean ridge
Earth is comprised of four systems, or spheres. Give one example of how a change in one of these spheres of the Earth can affect one or more of the other spheres.
Answer:
Earth is comprised of four circles: the lithosphere, hydrosphere, atmosphere, and biosphere. Changes in any piece of the Earth's framework influences every single other circle.
For example, storms structure in the air which bring precipitation and leads to the rain. Rain influences the hydrosphere by expanding the measure of water in a river, which influence the progression or flow of the stream. flowing rivers change the outside of the lithosphere. Plants and creatures in the biosphere rely upon water to endure.
Blank provide energy to the ecosystem and convert carbon dioxide into oxygen
A predators
Bheterotrophs
C autotrophs
D consumers
Answer:
Autotrophs
Explanation: Pennfoster
Summarize the role of bacteria in keeping the nitrogen cycle balanced.
Answer:
dear user
the answer is given above
un caballo negro de antepasados desconocidos fue apareado con cierto numero de yeguas de color rojo deraza pura, estos apareamientos dieron 20 descendientes de colo rojo y 25 de color negros
Pregunta completa: un caballo negro de antepasados desconocidos fue apareado con cierto numero de yeguas de color rojo de raza pura, estos apareamientos dieron 20 descendientes de colo rojo y 25 de color negros.
A) cual de dichos caracteres fenotipicos es mas probable que este causado por un homocigoto recesivo?
B) segun su hipotesis cuantos individuos de cada clase habrian esperado
Answer:
A) El color rojo es causado por un genotipo homocigota recesivo
B) Se habrían esperado 22.5 individuos negros y 22.5 individuos rojos, que juntos sumarian un total de 45 individuos.
Explanation:
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