when two strains of bacteria with genotypes abcd and abcd are grown together in the lab, a small number of bacteria with the genotype abcd eventually arise. how does this likely occur?
Answer:
These enzymes work in two ways. Some are pre-replicative and search the DNA for nucleotides with unusual structures
Explanation:
This happened through a lateral transfer of genes.
We can arrive at this answer because:
Lateral gene transfer is a system for exchanging genetic material between unrelated bacteria.Bacteria are beings that reproduce without the exchange of genetic material, but in some cases, this can be done with the lateral transmission of genes.This transmission can be done through the process of conjugation, translation, or transformation.The result is that new bacteria are created with a mixture of genes from two unrelated bacteria.
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How did the floating rubber ducks get from the coast of Japan all the way across the Pacific Ocean to Canada and Alaska?
Answer:
id say the tides, but i dont know your answer choices. If you post them i could help more.
Explanation:
summarize the effects of mutations on organisms?
Answer: Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is a cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.
Explanation: Hope this helped!
Mrs. Blue and Mrs. Green had babies at the same hospital and at the same time. Mrs. Blue took home a girl and named her Nancy. Mrs. Green took home a boy and named him John. However, Mrs. Green was sure she had a girl and brought suit against the hospital. Blood tests showed that Mr. Green was type O, Mrs. Green was type AB, and Mr. and Mrs. Blue were both type B. Nancy was type A, and John was type O.
Required:
Was there a mix-up at the hospital?
Answer:
no there was not
What caused the stickleback population to have less armor and become faster?
Answer:
the changes were caused by different genes in each species.
Explanation:
the cell cycle represents the coordinated sequence of events in the life
Explanation:
The cell cycle represents the coordinated sequence of events in the life of a cell from its formation to its division into two daughter cells. Most of the key events of the cell cycle are restricted to a specific time within the cycle. In this exercise, you will identify when various events occur during the cell cycle.
how can different amino acids affect secondary structure
Answer:
Exposure to positively charged amino acids (arginine and lysine) is found to clearly stabilize the secondary structure. Kinetically, each amino acid promotes folding by generating a large increase in the folding rate with little change in the unfolding rate.
máu thuộc loại mô gì
máu là Mô liên kết!!!!!!!!!!!!!!!!!!!!!!!
what will be the result if a eukaryotic cell completes mitosis but does not undergo cytokinesis?
A cell that completed mitosis but does not undergo cytokinesis PRODUCES one cell with two nuclei, each identical to the nucleus of the parent cell. Cytokinesis is the last phase of cell division.
Cytokinesis is the process by which a parental cell divides its cytoplasm to produce two genetically identical daughter cells, each one containing one cell nucleus.
Cytokinesis occurs in both types of cell division, i.e., mitosis and meiosis.
In animal cells, cytokinesis occurs by the emergence of a contractile ring that appears just beneath the cell membrane.
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WHAT IS OSMOREGULATION
Answer:
Osmoregulation is the process by which an organism regulates the water and electrolytic balance in its body to maintain homeostasis.
a bacterium has positively supercoiled dna. this is likely because
Answer:
A bacterium has positively supercoiled DNA. This is likely because? A. The bacteria don't normally express their genes. B.
Explanation:
The bacteria normally grow in high temperature condition. So, the correct option is D.
What is Bacteria?Bacteria are defined as tiny, single-celled organisms that are millions of different types of bacteria. Many can be found in and on the body and are beneficial to us. Bacteria lack a membrane-bound nucleus and other internal structures, so they are classified as unicellular life-forms called prokaryotes.
The bacteria in our bodies help break down the food we eat, provide us with nutrients and neutralize toxins that play an essential role in preventing infection by protecting colonized surfaces from invading pathogens.
Thus, the bacteria normally grow in high temperature condition. So, the correct option is D.
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Your question is incomplete, most probably the complete question is:
A bacterium has positively supercoiled DNA. This is likely because
A. It doesn't matter if the supercoiling is positive or negative as long as it compresses the DNA
B. The bacteria need most of their genes to be active
C. The bacteria don't normally express their genes
D. The bacteria normally grow in high temperature condition
Can someone help me please this is my last question Ill give brainly when 2 people
answer you have 20 mins!!!
No Bots Or I Will Report!!!!
Answer:
i do not your question I'm sorry
Tại sao con người chúng ta lại sốt nhiều lần như vậy?
Answer:
Fever is an elevated temperature of the human body that is substantially beyond the normal range. Normal body temperature fluctuates daily from about one degree below 98.6 degrees Fahrenheit to one degree above that number. Lower body temperatures usually occur before dawn; higher temperatures in the afternoon.
Body temperature also varies slightly depending on where on the human body it is measured. Rectal (internal) temperature tends normally to be higher than skin (surface) temperature. Oral and armpit temperatures can approximate actual body temperature and are more convenient to measure.
which solution is hypertonic?
Answer:
the beaker
Explanation:
the beaker (0.5 m salt) has more solvent than the red blood cell (0.1 m salt). Therefore, it means that the red blood cell is hypotonic (more water/solute), and the beaker is hypertonic (more solvent/salt).
hope this helps! <3
Recently you submitted your "bucket list" of 10 places you would like to visit/see/explore on Earth or Space . I want you to review that list and if you could only pick one place to go in your life-time where would you choose to go? Why?
Answer:
This is a personal question.
Explanation:
Explain how kinetic energy affects each object as it changes its state of matter:
A) Water boiling:
B) Popsicle freezing:
C) Water condensing on the side of a water bottle:
Answer:
Explain how kinetic energy affects each object as it changes its state of matter:
A) Water boiling:
B) Popsicle freezing:
C) Water condensing on the side of a water bottle:
Explanation:
A) A water boiling will result in evaporation, therefore the particles will move extensively faster than liquid due to it being vapor.
B) A popsicle freezing is originally a solid so it'll have the least amount of kinetic energy as the particles remain fairly slow.
C) Due to the fact that water is condensing, while turning into a liquid. The water condensing on the side of the water bottle would produce a lower kinetic energy level due to the fact that it's becoming a liquid. Though liquids have higher kinetic energy than solids, as gases have a higher kinetic energy compared to liquids.
Evaporation from boiling water causes the particles to move much more quickly than they would in a liquid state.
What is Kinetic energy?A popsicle is initially a solid, it will have the least kinetic energy because the particles are still moving slowly. Because water is condensing as it transforms into a liquid.
Because it is turning into a liquid, the water that is condensing on the water bottle's side would have less kinetic energy.
Gases have a higher kinetic energy than liquids, despite the fact that liquids have a higher kinetic energy than solids.
Therefore, Evaporation from boiling water causes the particles to move much more quickly than they would in a liquid state.
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name a difference between a plant cell and an animal cell.
Answer:
the cell wall, chloroplasts
Explanation:
plant cells have a cell wall, but animal cells do not
plant cells also have chloroplast, but animal cells don't
Sulfur dioxide _____.
A.) creates a reddish-brown haze in the sky
B.) is a secondary air pollutant
C.) has an irritating odor and is colorless
D.) is relatively harmless to the environment
Answer is C
Answer:
C.) has an irritating odor and is colorless
Explanation:
Sulfur dioxide is a chemical compound that's very toxic, non-flammable, colorless, and has a pungent odor. It's chemical formula is [tex]SO_2[/tex].
Please help !! 100pts
1.
Which of the following best summarizes why the technological invention of microscopes was important to biology?
It created public interest and support for research.
It created a means of funding for cell research.
It allowed for development of the cell theory.
It proved that cells could form spontaneously.
2.
Which of the following best compares the structures found in plant cells and animal cells?
Plant cells have rigid cell walls and do not contain mitochondria or ribosomes while animal cells do.
Plant cells contain rough endoplasmic reticulum and a Golgi apparatus while animal cells contain smooth endoplasmic reticulum surrounded by lysosomes.
Animal cells do not contain chloroplasts, cell walls, or a large central vacuole while plant cells do.
Animal cells contain cell walls and a large central vacuole while plant cells contain cell membranes and many small vacuoles.
3.
Which equation describes what happens in photosynthesis?
CO2 + O2 + H20 + energy → CH2O5
6CO2 + 6H2O + energy → C6H12O6 + 6O2
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy
C6H12O6 + H20 → CO2 + energy
4.
Early elements of the cell theory followed soon after the development of Hooke’s light microscope. What does this relationship suggest about the evolution of the cell theory since Hooke?
Progress on the cell theory was delayed by a lack of technological progress.
Scientists needed to focus less on cells and more on microscope development.
Isolated scientists contributed pieces of the cell theory to form the whole.
Improvements in technology are closely related to changes in the cell theory.
5.
Oxygen is a product of photosynthesis. The primary role of this oxygen in cellular respiration is to
combine with lactate, forming pyruvate.
combine with carbon, forming CO2.
yield energy in the form of ATP as it is passed down the respiratory chain.
act as an acceptor for electrons and hydrogen, forming water.
6.
Some proteins catalyze biochemical reactions. If a genetic defect prevented a protein catalyst from being produced, which of the following do you predict would happen in the cell?
The reverse reaction of the one the protein catalyzes would begin to proceed.
The reaction the protein catalyzes would only occur in some places in the cell.
The cell would find a different type of protein to catalyze the reaction.
The reaction the protein catalyzes would proceed very slowly or not at all.
7.
Which statement best compares a eukaryote and a prokaryote?
Eukaryotes use active transport to move substances across the cell membrane, while prokaryotes use facilitated diffusion.
Eukaryotes have membrane-bound organelles, while prokaryotes have few specialized structures.
Eukaryotes use flagella to move themselves through substances, while prokaryotes are not able to move.
Eukaryotes have a cell wall, while prokaryotes have a cell membrane.
8.
What are the reactants for cellular respiration?
H2O and O2
Glucose and O2
Glucose and CO2
H2O and CO2
9.
Which of the following best compares the membranes found in different types of cells?
Animal cells have cell membranes and cell walls, but plant cells do not have cell membranes.
Prokaryotes and eukaryotes both have cell membranes, but eukaryotes also have membrane-¬‐bound organelles.
Animal cells have membrane-¬‐bound organelles, while plant cells carry out the functions necessary for life in the cytoplasm.
Prokaryotes have only cell membranes, while eukaryotes have both cell walls and cell membranes.
10.
Which of the following characteristics defines a cell as a eukaryote?
Having ribosomes
Being able to move
Having a nucleus
Being able to reproduce
11.
Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?
Harmful organisms living in water would reproduce at a rapid rate.
Organisms that are sensitive to changes in temperature would die.
Flooding would occur and animals would be forced to migrate.
Plants would not have enough water to effectively carry out photosynthesis.
12.
Which of the following best describes a result of the polar nature of water molecules?
Ionic compounds dissolve easily in water.
The volume of water decreases by nearly half when it is frozen.
Water molecules repel each other.
Water molecules repel most other substances.
Explanation:
1. It allowed for development of the cell theory.
2. Animal cells do not contain chloroplasts, cell walls, or a large central vacuole while plant cells do.
3. 6CO2 + 6H2O + energy → C6H12O6 + 6O2
4. Improvements in technology are closely related to changes in the cell theory.
5. Yield energy in the form of ATP as it is passed down the respiratory chain.
6. The reaction the protein catalyzes would only occur in some places in the cell.
7. Eukaryotes have a cell wall, while prokaryotes have a cell membrane.
8. Glucose and O2
9. Animal cells have cell membranes and cell walls, but plant cells do not have cell membranes.
10.Having a nucleus
11. Plants would not have enough water to effectively carry out photosynthesis.
12. Ionic compounds dissolve easily in water.
I hope this helps!
Which statement is true of X chromosomes?
A. Women have two of them.
B. Half of the babies born do not save them.
C. Only women have them.
Đ. Only men have them
What can you conclude about two thermometers, one which is at 25 ˚C and the other which is at 20 ˚C?
SELECT AN ANSWER
A- The kinetic energy of the 20 ˚C thermometer is greater than the kinetic energy of the 25 ˚C thermometer.
B- The particles in the 20 ˚C thermometer are moving faster than in the 25 ˚C thermometer.
C- The particles in the 25 ˚C thermometer are moving faster than in the 20 ˚C thermometer.
D- Both thermometers have particles moving at the same speed.
SUBMIT
0%
Which example is an internal stimulus? help plz
For example one of the internal stimuli is hunger which is the sign of low energy in the body. It stimulates us to eat something to regain the needed energy. Blood Pressure: Blood pressure is an internal stimulus of mammals that is measured by receptors in arteries.
Answer:
Thirst, Anyone who has ate contaminated food are examples.
Explanation:
Internal stimulus is the change That happens inside the body.An example of an internal stimulus for a Lion is hunger.Help fast pls
Which statement describes the process of osmosis in an animal cell?
A)
Sugar molecules move across the plasma membrane until the cell has
enough energy to
grow in size and dividel
B)
Water molecules move across the plasma membrane until solute
concentrations are equal
on both sides of the membrane.
C)
Tons move across the plasma membrane until the inside of the cell has a
higher
concentration of positive charges.
D
Enzymes move across the plasma membrane until the cell has completed
metabolism
Answer:
hi b is the correct one<3 have a good day
Explanation:
Water molecules moving across the plasma membrane until solute concentrations are equal on both sides of the membrane best describes the process of osmosis in an animal cell .
Osmosis is the process in which molecules move from a region of higher concentration to that of a lower concentration across a semi-permeable membrane.
Osmosis provides a balance between the elements in which organisms are exposed to. A very high concentration may cause cells to shrink and die hence the reason to maintain a balance for optimal functions and survival.
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Four people are spaced at different distances from where a dog is barking. The barking will sound the loudest to the
person who is standing
4 m away
o 15 m away
0 1 m away
O 12 m away
Answer:
C
Explanation:
Four people are spaced at different distances from where a dog is barking. The barking will sound the loudest to the person who is standing near the dog that will experience loud barking voice of dog. Thus the correct option is C that is 1m.
What is sound frequency?
Frequency is referred to as pitch that is the number of times per second that a sound pressure wave repeats itself.
The units of frequency are known as hertz (Hz). Humans can hearing can hear sounds between 20 Hz and 20,000 Hz.
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If 2x 2 + 13x – 7 = 0, then x could equal to which of the following?
Answer:3/13
Explanation:
Answer:
x = 1/2 and x = -7
Explanation:
you need to factor
multiply 2 x -7 to get -14
then find factors of -14 that add to give you 13
14 and -1 work
now rewrite the original equation but replace 13x with 14x - 1x
so 2x^2 + 14x - 1x -7 = 0
now factor by grouping
(2x^2 + 14x) (-1x - 7) = 0
factor the greatest common factor out of each group
2x(x + 7) -1(x + 7) = 0
the factors are (2x - 1) (x + 7) = 0
set each factor equal to zero and solve both for x
2x - 1 = 0 x + 7 = 0
+1 +1 - 7 - 7
2x = 1 x = -7
÷2 ÷2
x = 1/2
How might the Earth's surface change because a volcano erupts?
How does the human immune system work
Answer:
The acquired immune system, with help from the innate system, produces cells (antibodies) to protect your body from a specific invader. These antibodies are developed by cells called B lymphocytes after the body has been exposed to the invader. The antibodies stay in your child's body.
What is the total number of particles inside the cell
Which is not some other occurs in translation?
Explanation: Translation has pretty much the same three parts, but they have fancier names: initiation, elongation, and termination. Initiation ("beginning"): in this stage, the ribosome gets together with the mRNA and the first tRNA so translation can begin.
I guess this helped you
El ARNm inmaduro de un gen eucarionte presenta 5 intrones. El tamaño total de los exones es de 3000 bp (pares de bases). ¿Cuántos exones tiene este gen? ¿Cuántos aminoácidos tiene la proteína codificada por este gen?
Answer:
I
Explanation:
tree
