Answer:
36
Explanation:
A two-point test-cross is a cross between an individual with a double heterozygote genotype and a homo-zygous recessive individual in order to determine the recombination frequency between two linked genes. In genetics, one map unit (m.u.) can be defined as the measure of the distance (i.e., genetic distance instead of physical distance) between genes for which one (1) product of meiosis in one hundred (100) is recombinant. In this case, 36 of the offspring have the recombinant phenotype, while the remaining 64 offspring are not recombinant, and therefore both genes are separated by 36 mu (64 + 36 = 100 >> 36 mu).
The distance between two genes is usually expressed in map units. In the exposed example, 36 MU separates the two loci.
----------------------------------
The map unit is used to express the distance between a pair of genes.
To interpret it, we need to consider that for every 100 meiotic products, one of them results in a recombinant product.
The genetic distance will result from multiplying the recombination frequency by 100 and expressing it in map units (MU).
To calculate the recombination frequency we will use the next formula:
P = Recombinant number / Total of individuals.
We know that
Recombinant number = 36Parental number = 64Total number of individuals = 36 + 64 = 100 individualsSo now, all we need to do is to replace the terms by their values
P = Recombinant number / Total of individuals
P = 36 / 100
P = 0.36 ⇒ Recombination frequency
Now we need to get the distance between genes, expressed in Map Units.
P = 0.36
Distance in MU = P x 100 = 0.36 x 100 = 36 MU.
So, 36 MU separates the two loci.
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Tiffany wants to know the effect of eating sugary snacks on
performance in PE class. She decides to set up an experiment to find
out. Which of the following groups of individuals is the experimental
group? *
Students who take a PE class at their school.
Students who take a PE class and who will not be eating sugary snacks before PE
class.
Students who take a PE class and who will be eating sugary snacks before PE class
Students taking any class at school eating any food.
Answer:
students who take a PE class at their school.
evolution by natural selection is an example of a scientific
Answer:
Ideas aimed at explaining how organisms change, or evolve, over time date back to Anaximander of Miletus, a Greek philosopher who lived in the 500s B.C.E. Noting that human babies are born helpless, Anaximander speculated that humans must have descended from some other type of creature whose young could survive without any help. He concluded that those ancestors must be fish, since fish hatch from eggs and immediately begin living with no help from their parents. From this reasoning, he proposed that all life began in the sea.
Although ____________ is the most efficient and sometimes least-costly way to cut trees, it can also harm an ecosystem by causing increased erosion, sediment pollution of nearby waterways, and losses in biodiversity.
Answer:
Clear cutting.
Explanation:
Clear cutting is the most efficient and less costly way to cut down the trees. This practice of cutting trees can harm an ecosystem by increasing erosion, sediment pollution of waterways, and losses in biodiversity that lives there before the cutting of trees. This clear cutting destroy the habitat of thousand of organisms and erosion of the productive layer of soil occurs that is depleted due to heavy rainfall and wind.
Plz answer this. I miss typed it as advanced placement.
Answer:
option 1
Explanation:
Answer:
a and R
are correct
Explanation:
what is reflex action
A action that has came in result of an event
A projectile is fired vertically upward at an initial velocity of 100 m/s. How high will it rise? How long will it take to reach that height?
The question is solved using the equations of motion
According to the equations of motion:
[tex]v^2 = u^2 -2gh[/tex]
v = final velocity
u = initial velocity
g = acceleration due to gravity
h = height
Note that at the maximum height, the final velocity (v) = 0 m/s
so we can write:
[tex]u^2 = 2gh[/tex]
[tex]h = \frac{u^2}{2gh}[/tex][tex]h= \frac{100^2}{2 * 10}[/tex]
h = 500 m
The time taken is obtained from:
[tex]v= u - gt[/tex]
since v= 0 at maximum height
[tex]u = gt\\\\t= u/g\\\\t= 100/10\\t = 10 s[/tex]
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Which actions could be categorized in the “aerobic” section of the Venn diagram?
Check all that apply.
consists of three stages
yields 36 ATP molecules
does not require oxygen
produces lactic acid
starts process with a glucose molecule
Identify the stage of cellular respiration in which each of the following takes place.
Produces 32 ATP molecules
Creates four ATP molecules, but then gains overall only two
Gives off carbon dioxide
Gives off water
Produces two ATP molecules
Answer:
start process with gulcose
Explanation:
simple
What statements are true about glycolysis?
Select all that apply.
it consumes some ATP as well as producing it
it produces ATP that can be directly used by cells
o it does not directly require oxygen to operate
o it produces more ATP than any of the other respiration reactions
Answer:
true it consumes some ATP as well as producing it
true it produces ATP that can be directly used by cells
true it does not directly require oxygen to operate
false it produces more ATP than any of the other respiration reactions
Glycolysis consumes some ATP as well as producing it, it produces ATP that can be directly used by cells and it does not directly require oxygen to operate. Hence option A,B and C is correct.
What is ATP?ATP stands for adenosine triphosphate. It is defined as an organic substance that fuels a variety of functions in living cells, including chemical synthesis, condensate dissolution, nerve impulse transmission, and muscular contraction. It is a byproduct of the photophosphorylation, cellular respiration, and fermentation processes and serves as the primary energy currency of the cell.
Glycolysis is defined as a chain of events that convert glucose into two pyruvate molecules, which have three carbons each. Glycolysis is a cytoplasmic process that breaks glucose down into two molecules with three carbons apiece and releases energy. Hexokinase, a phosphorylating enzyme, assists in the phosphorylation process that traps glucose.
Thus, glycolysis consumes some ATP as well as producing it, it produces ATP that can be directly used by cells and it does not directly require oxygen to operate. Hence option A,B and C is correct.
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Which type of graph could be easily converted into a pie chart?
Answer:
bar graph can be easily converted to pie chart
What is mean by photosynthesis?
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.
Hey there!
Photosynthesis is the reaction that converts light energy to chemical energy in sugar and carbohydrates. Humans can't eat sunligh, so we eat the plants. Plants convert the energy in the sunlight into chemical energy using chlorophyll. Chlorophyll is a molecule produced by plants, algae and cyanobacteria, which aids in the conversion of light energy into chemical bonds. It is the reen pigment found in the chlorookasts of higher plants. They are a part of our ecosystem, and they are lower on the food chain.
Hope this helps! I promise I did not copy or anything like that from the internet.
Have a great day! :)
Which of the following situations would most likely lead to a stable population size?
Answer:
A. The rates of birth and immigration were balanced by the rates of death and emigration.
11
Select the correct answer.
Which part of an atom has most of its mass?
A.
electrons
B.
neutrons
Oc.
nucleus
OD.
protons
Reset
Answer:
C NUCLEUS
Most of an atom's mass is in the nucleus—a small, dense area at the center of every atom, composed of nucleons. Nucleons include protons and neutrons. All the positive charge of an atom is contained in the nucleus, and originates from the protons.
why must the composition of the dialysis fluid be similar to that of the blood
Answer:
Because the purpose of dialysis is to mimic blood and clean the blood because the persons kidneys dont work. If it is not similar to blood it wont work
Explanation:
What is the scientific term used for the chemical reaction when a fuel burns? (Hint: your answer should be one word.)
Answer:
Combustion
Explanation:
Combustion is the chemical reaction that happens when fuel burns.
Read the paragraph. [1] Our house was once a stop on the Underground Railroad. [2] It was common for an enslaved person to stop there on their way to the North. [3] The Underground Railroad were a network of hiding places. [4] The cellar beneath our house has a secret door that was installed to trick slave catchers. Which sentence has a subject-verb agreement error? sentence 1 sentence 2 sentence 3 sentence 4
Answer:
sentence 3
Explanation:
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In sentence 3 'The Underground Railroad were a network of hiding places' a subject-verb agreement error is observed.
What is a subject-verb agreement?In a sentence when the subject of the sentence does not accept in number with the verb, the sentence misses subject-verb agreement.
In the given sentence 'The Underground Railroad were a network of hiding places' the verb “were” is not matching the subject, it is a subject-verb agreement error.
There would be, 'was' is used as a verb in sentence three, correctly sets the subject-verb agreement. The subject of this sentence is the singular “one,” not the plural “Railroads.” This suggests the verb should also be singular.
Therefore, sentence three correctly depicts the subject-verb agreement error.
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Biomass is a :
(a) Dry weight of living organism
(b) Fresh weight of living organism
(c) Dry weight of dead organism
(d) Fresh weight of dead organism
(1) only a (2) a,b (3) c,d (4) only c
Answer: 1. only A
Explanation: bio means living
Answer:
(a) Dry weight of living organism
hope this help you
define zygote as it is used in biology
Answer:
fertilized egg
Explanation:
Zygote, fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm). In the embryonic development of humans and other animals, the zygote stage is brief and is followed by cleavage, when the single cell becomes subdivided into smaller cells.
Britannica
Answer:
A zygote is a eukaryotic cell that is produced when two gametes fertilize each other. The genome of a zygote is made up of the DNA from each gamete and includes all of the genetic information needed to create a new person. The zygote is the most basic developmental stage of multicellular organisms.
OAmalOHopeO
Please list answers below
How do temperature and concentration of monounsaturated phospholipids change the rate at which molecules permeate the plasma membrane?
Answer: At low temperatures the fluidity of the membrane decreases and it favors fluidity. The higher the concentration of unsaturated fatty acids, the less tightly the phospholipids can bind and the more fluid (more permeable).
Explanation:
The plasma membrane is a lipid layer that delimits the entire cell, dividing the extracellular medium from the intracellular (the cytoplasm of a cell). They are composed of phospholipids, which are molecules composed of glycerol, a phosphate group and two lipid chains (such as fatty acids). Glycerol is a three-carbon molecule that functions as the backbone of this membrane. A geometry is formed that allows the phospholipids to line up side by side to form broad sheets. They are insoluble in water, but their unique geometry causes them to aggregate in layers without any energy input, as they possess a hydrophilic phosphate head and a hydrophobic tail consisting of the two fatty acid chains. The hydrophilic heads of the phospholipids in a bilayer membrane face outward and are in contact with the aqueous fluid inside and outside the cell. Because water is a polar molecule, it readily forms electrostatic (charge-based) interactions with the phospholipid heads.
Selective permeability is a property of the plasma membrane and other semipermeable membranes that allow only certain particles to pass through them. In this way, those particles that are needed by the cell can enter the cell and those that are not useful to the cell are prevented from entering. In the same way, the cell can eliminate the particles it has produced as waste. In this way, the entry and exit of substances through the membrane is regulated and the correct functioning of the cell is achieved.
For a particle to be able to cross the plasma membrane it must have a size equal to or smaller than the pores of the membrane, it must have the opposite charge to the charge of the membrane or simply have a neutral charge, and if it is larger than the pores it must be dissolved in a solution, decreasing its size and thus be able to enter the cell through the membrane.
Plasma membranes are fluid and this fluidity depends on their lipid composition and temperature. Depending on the temperature, membrane lipids can be found in two different states or phases: gel (solid-like, with more rigid hydrocarbon chains) and liquid crystal (more fluid, with more mobile hydrocarbon chains). At low temperatures the fluidity of the membrane decreases and in these conditions the increase of its concentration favors fluidity. The temperature at which the transition from one state to the other occurs is the phase transition temperature (Tc). At values below Tc, the bilayer is in the gel state and at higher values it passes to the liquid crystal. It should be noted that there is an equilibrium between the gel state and the liquid crystal state and that the characteristics of the lipids of the bilayer condition the transition temperature. In the case of bilayers consisting of only one type of lipid, the Tc is well defined. But biological membranes are complex lipid mixtures and the transition from one state to another occurs over a range of temperatures. The presence of short-chain or unsaturated fatty acids reduces the transition temperature, while saturated fatty acids and the increase in the length of the hydrocarbon chains cause this temperature to rise. Then, phospholipids with unsaturated fatty acid tails cannot bind as tightly due to the bent structure of their tails. For this reason, a membrane of unsaturated phospholipids remains fluid at lower temperatures than a membrane of saturated phospholipids.
The fluidity of a membrane is the ability of a molecule to move through it. In short, the higher the concentration of unsaturated fatty acids, the less tightly the phospholipids can bind and the more fluid (more permeable) the membrane will be even at low temperatures. However, at low temperatures the fluidity of the membrane decreases (lower permeability) but the effect will depend on the composition of the fatty acids. To determine the exact permeability, it is necessary to relate the concentration of unsaturated bonds and the length of the fatty acids in the phospholipids and the temperature.
What would happen if there were no condensation stage in the water cycle?
Answer:
Choice A. Water could not convert from a gas to a liquid.
Explanation:
Condensation is the process of cold humid air (gas) coming into contact with a surface and collects water droplets (liquid) on it.
Answer:
A
Explanation:
Which best describes the processes of mitosis and meiosis?
Cells in mitosis go through the PMAT stages twice to produce diploid cells while cells in meiosis go through PMAT stages once to produce haploid cells.
Cells in mitosis and meiosis go through the PMAT stages twice to produce haploid cells.
Cells in mitosis go through the PMAT stages once to produce diploid cells while cells in meiosis go through PMAT stages twice to produce haploid cells.
Cells in mitosis and meiosis go through the PMAT stages once to produce diploid cells.
Answer:
cells in mitosis go through the PMAT stages twice to produce diploid cells while cells in meiosis go through PMAT stages once to produce haploid cells, is. the best answer
Answer:
The Answer is A.) Cells in mitosis go through the PMAT stages twice to produce diploid cells while cells in meiosis go through PMAT stages once to produce haploid cells.
Explanation:
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How are mitosis and binary fission similar?
A. They produce identical daughter cells.
B. They occur only in prokaryotes.
C. They involve division of nuclei as well as cytoplasm.
D. They occur only during sexual reproduction.
Answer:
They produce identical daughter cells.
Which of the following is found in the 'rungs' of a DNA strand?
A. Phosphate
B. Thymine
C. Uracil
D. Deoxy Ribose
Important steps in sequencing pure proteins include all of these except: a. Determining the amino acids on the ends of the smaller peptides b. Determining the isoionic pH of the protein c. Determining the amino acids on the ends of the protein d. Breaking the protein into smaller peptides e. Determining the amino acid composition
Answer:
b. Determining the isoionic pH of the protein
Explanation:
The sequencing of pure proteins is nothing more than the analysis of the amino acids present in isolated proteins. This analysis is composed by the study of the sequence that the amino acids assume within the protein, the amino acids present in the extremities and the constitution of each one of these amino acids. In summary, we can state that protein sequencing refers to the constitution of these proteins. In this case, the isotonic pH of these proteins is not relevant information.
hello!!
What´s Antibiotic
Antibiotics are drugs that are able to fight diseases caused by bacteria. Besides, it is a "golden solution" that can kill harmful bacteria (pathogenic bacteria such as fungi, actinomycetes, ...), has the effect of inhibiting the growth and spread of of these bacteria.
Answer:
antibiotics mean a type of antimicrobial substance against bacteria.
Whiteflies are common pest insects found on cotton, tomato, poinsettia, and many other plants. Nymphs are translucent and mostly sessile, feeding on their host plant's phloem (sap) from the undersides of leaves. They undergo incomplete metamorphosis into winged adults. Because whitefly nymphs cannot escape predation by moving, you hypothesize that their translucent bodies make them hard to spot by predators. How could you directly test this hypothesis?
Answer: Comparing the rates of predation on whitefly nymphs coated with a nontoxic dye versus the undyed whitefly nymphs.
Explanation:
A hypothesis refers to an assumption, which is proposed for the sake of an argument which is tested to ascertain if it's true.
The hypothesis can be tested by comparing the rates of predation on whitefly nymphs coated with a nontoxic dye versus the undyed whitefly nymphs.
Using your observations and knowledge of galaxies, is there a pattern or organization to how the billions of stars are arranged in a single galaxy or do you feel it is random?
Billions of stars in a single galaxy are arranged in : Pinwheel pattern with four major arms
What is a galaxy ?A galaxy is a collection of, billions of stars, dust and gases. galaxies are arranged in the universe in gravitational bound clusters. While the billion stars in a singles galaxy are arranged in pinwheel pattern with four major arms.
Hence we can conclude that Billions of stars in a single galaxy are arranged in : Pinwheel pattern with four major arms
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for fun
if you had to choose what animal would you be^-^
Answer:
Husky. Why not?
Explanation:
Beth broke her ankle bone. The doctor gives her a
brochure on foods she can eat to help restore the
health of her bones. Which element will help Beth
strengthen the bone?
Answer:
Calcium
Explanation:
Calcium is the healthy bone mineral. About 99% of the calcium in the body is stored in the bones and teeth. It's the mineral that makes them hard and strong. The remaining 1% is needed for many activities that help keep the body functioning normally.
Answer:
Phosphorus will strengthen her bones.
Explanation:
There are a wide number of dietary minerals that are involved in the strengthening of bones. But among all of them, calcium and phosphorus are the key minerals that play an active role in providing strength to the bones. Phosphorus keeps the bones healthy and strong. It also helps in the growth of bones.
Low amounts of phosphorus can lead to thinning of the bones, a disease termed as osteoporosis.
Helpppppp!!!
Which of the following is an example of a hormone?
Adrenaline
Blood
Calcium
Thyroid
Answer:
Adrenaline is an example of a hormone. Hormones are chemical messengers in your body, which carry around messages. Adrenaline is a hormone that is released when you are in fear, stress, or doing something dangerous.
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