Antibiotic resistance can vary within a population of bacteria. The diagram below represents the changes in a population of bacteria as a result of exposure to antibiotic over time.
Explain how this is an example of natural selection, and why we can use this as evidence that evolution occurs.
Answers
Answer:
The resistance that some bacterial populations develop to an antibiotic is an example of natural selection because the individuals with more resistance are those that survive, being an evidence of evolution since resistance can be inherited to the following generations.
Explanation:
The resistance to antibiotics that bacteria develop is the best example of how natural selection and evolution occurs, especially because of the fast and easy reproduction of these microorganisms.
In the example it can be seen that only the the most resistant bacterial populations to the antibiotic survive over time. Antibiotic resistance is due to mutations developed by bacteria that modify their structure and function so that they are not affected by an antimicrobial. According to natural selection, these mutations make resistance an inherited trait, and future generations will not be sensitive to the effect of the drug.
Why does natural selection occur? Only resistant individuals survive the effect of the antibiotic.
How do you explain evolution? Successive generations of bacteria have evolved, through mutations, to resist the effect of an antibiotic.
Related Questions
Help please I’ll give brainliest only if you are right
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Answer:
1 st question ) Lack of food and oxygen and the presence of wastes limit their growth.
Please can someone help I’ll do anything:(
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Which three minerals are most commonly found in the igneous rock granite?
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Answer:
Granites and rhyolites consist predominantly of quartz and potash feldspar; gabbros and basalts, predominantly of pyroxene and plagioclase feldspar. Other rock types have intermediate mineral compositions.
Explanation:
It is made up of sodium feldspar, potassium feldspar, and coarse quartz grains (10–50%). More than 80% of the rock is composed of these minerals.
What is igneous rock granite?Granite is a pale-colored plutonic rock that is mostly found in mountainous regions of the continental crust.
Quartz and potash feldspar make up the majority of granites and rhyolites, whereas pyroxene and plagioclase feldspar make up the majority of gabbros and basalts. Other types of rocks contain mineral compositions that are in between.
Magma, which is a molten substance that flows and hardens underground while slowly cooling, is the source of intrusive rocks.
Therefore, the majority of the continental crust is composed of granite, the most common kind of igneous rock, intrusive igneous rock is granite.
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Which of the following best describes the relationship between the endoplasmic reticulum and the plasma membrane in eukaryotic cells?
Answers
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, there is a distinct relationship between the endoplasmic reticulum and the plasma membrane. The endoplasmic reticulum are responsible for protein synthesis which are used by the remaining organelles (including the membrane) to function. The endoplasmic reticulum is also involved in lipid synthesis and has a network of tubules (which are used for carrying materials throughout the cell) that can deliver lipids into the cell membrane. These lipids are responsible for the semi-permeability function of the cell/plasma membrane.
What is the endocrine system
Answers
Answer:
The endocrine system is responsible for being the chemical messenger of the body and controlling metabolism and respiration.
Where does replication occur?
Answers
Answer:
in the cytoplasm of prokaryotes and in the nucleus of eukaryotes.
Explanation:
this only occurs in replication of the DNA
Which of the following is not true about DNA replication?
a
The new DNA molecule has two newly-made strands.
b
It occurs in the nucleus of eukaryotic cells.
c
It must occur before a cell can divide.
d
The double strand unwinds and unzips while it is being duplicated.
Answers
Answer:
A. the new DNA molecule has two newly-made strands
Help MEEEE PLEASEE........
Answers
Answer:
Z
Explanation:
Because it includes various other ecosystems
Explanation:
* earth science
MULTIPLE CHOICE
As Keisha heats up water for hot chocolate, the molecules
Answers
Answer:
the molecules expand
Explanation:
When water is heated, it expands, or increases in volume. When water increases in volume, it becomes less
What were the major contributions of the H.M.S. Challenger to the study of oceanography? How did its expedition contribute to future studies of the ocean?
Answers
Answer:
The H.M.S. Challenger embarked from Portsmouth, England on December 21, 1872 and changed the course of scientific history. Physicists, chemists, and biologists collaborated with expert navigators to map the sea. This interdisciplinary spirit has continued to the present day. During the 4 year journey, the voyages circumnavigated the globe, sounded the ocean bottom to a depth of 26,850 feet, found many new species, and provided collections for scores of biologists.
C. Wyville Thomson led the expedition but died of exhaustion from the journey, which ended on May 24, 1876. The Challenger had zig-zagged around the globe and had visited every continent, including Antarctica.
The reports of the Challenger expedition were supervised by Sir John Murray, whose biological conclusions were of great importance to the later development of marine biology. He concluded, for example, that the deep-sea fauna was not "ancient," in that it did not resemble the faunas found in ancient fossil deposits.
Explanation:
Answer:
The H.M.S. Challenger changed the course of scientific history. The expeditions circumnavigated the world, sounded the ocean floor to a depth of 26,850 feet. Itdiscovered numerous new species, and supplied collections for hundreds of researchers over their four-year adventure. The Challenger was a corvette, a military ship that went by sail but had auxiliary steam power to help steady the ship during sampling. The expedition was commanded by C. Wyville Thomson, who died of fatigue on May 24, 1876, at the end of the voyage. The Challenger has zig-zagged its way around the world, stopping at every continent except Antarctica. Sir John Murray oversaw the Challenger expedition's reports, and his biological results were crucial to the eventual development of marine biology. For example, he decided that the deep-sea fauna was not "old" since it did not reflect faunas found in ancient fossil beds.
Explanation:
Here's a shorter paraphrased response
Translation involves _______ a form of RNA that brings amino acids to the ribosomes to be assembled into proteins.
Answers
Answer:
transfer RNA
Translation occurs on ribosomes and involves tRNA (transfer RNA), a form of RNA that brings amino acids to the ribosomes to be assembled into proteins. Each mRNA condon must join with the anticondon of the proper tRNA
Answer:
The answer is tRNA
Explanation:
edge2021
Invertebrates have a higher net production efficiency than mammals. Which statement most likely explains this observation? A. Invertebrates are more abundant than mammals in an ecosystem. B. Mammals maintain their body temperature; invertebrates don't. C. Most mammals are secondary consumers. Most invertebrates are primary consumers. D. Invertebrates have smaller bodies than mammals.
Answers
Answer:
C. Most mammals are secondary consumers. Most invertebrates are primary consumers.
Explanation:
Net production efficiency (NPE) refers to how efficient an organism at one trophic level is in utilizing and transferring energy to the next trophic level. Consumer organisms obtain energy (from biomass) when they feed on other organisms. They then use this energy for their metabolic activities and transfer the rest when eaten or fed on.
The net production efficiency decreases with increasing trophic level because higher organisms use more energy than lower ones. In this case, invertebrates use energy they obtained lesser or more efficiently than mammals, hence, making them have a HIGHER net production efficiency than mammals. Therefore, invertebrates are mostly primary consumers and utilize energy lesser than mammals which are mostly SECONDARY CONSUMERS.
Which is a part of interphase?
A. prophase
B. G1 phase
C. Cytokinesis
D. Teleophase
Answers
Answer:
An Interphase is made up of of G1 phase,S phase,andG2 phase. So i believe the answe would be B!
**A Punnett square should be used to find each answer.**
1. What is the chance that their child would have unattached earlobes? ¬¬¬_____
2. Beyonce has a straight hairline, which is a recessive trait. Bruno also has a straight hairline. What is the chance that their child would have a widow’s peak? _____
3. Beyonce has no dimples (Dd). Bruno has dimples, which is a recessive trait. What is the chance that their child would have dimples? _____
4. Beyonce has a cleft chin (CC). Bruno has a smooth chin, which is a recessive trait. What is the chance that their offspring would have a smooth chin? ____
5. Beyonce and Bruno are both heterozygous for brown eyes. What is the genotypic ratio for their offspring?
Answers
Answer:
100%
100%
50%
100%
75%
Explanation:
dont use the exact words so u can avoid plagerism lol
Complete dominance occurs when the dominant allele completely masks the recessive allele in heter0zyg0us individuals. 1) 100% / 2) no chance / 3) 50% / 4) no chance / 5) 1:2:1.
------------------------------------------------------------
Available data:
→ Six diallelic genes code for six different traits.
→ All genes express complete dominance, meaning that the dominant allele hides the expression of the recessive one.
→ Beyonce ⇒ ee ww Dd Hh cc Bb
→ Bruno Mars ⇒ ee ww dd Hh CC Bb
→ Cross: Beyonce x Bruno Mars
****************************
1) Earlobes
Parentals) ee x ee
Gametes) e e e e
Punnett square) e e
e ee ee
e ee ee
F1) 100% of the progeny is expected to have unattached earlobes, ee.
******************
2) hairline
Parentals) ww x ww
Gametes) w w w w
Punnett square) w w
w ww ww
w ww ww
F1) 100% of the progeny is expected to have straight hairline, ww.
There is no chance for their children to have widow’s peak because both of them are h0m0zyg0us recessive for the trait.
***********************
3) Dimples
Parentals) Dd x dd
Gametes) D d d d
Punnett square) D d
d Dd dd
d Dd dd
F1) 2/4 = 1/2 = 50% of the progeny is expected to have dimples, dd
2/4 = 1/2 = 50% of the progeny is expected to have no dimples, Dd.
***********************
4) Chin
Parentals) CC x cc
Gametes) C C c c
Punnett square) C C
c Cc Cc
c Cc Cc
F1) 100% of the progeny is expected to have cleft chin, Cc
There is no chance for their children to have smooth chin because one of them is h0m0zyg0us dominant and the other one is h0m0zyg0us recessive for the trait.
The whole porgeny is expected to be heter0zyg0us, Cc, expressing cleft chin.
***********************
5) Eyes
Parentals) Bb x Bb
Gametes) B b B b
Punnett square) B b
B BB Bb
b Bb bb
F1) 3/4 = 75% of the progeny is expected to have brown eyes, BB + Bb
1/4 = 25% of the progeny is expected to have blue eyes, bb
Genotypic ratio ⇒ 1:2:1Phenotypic ratio ⇒ 3:1-----------------------------------------------
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8.394 x 109
scientific notation
Answers
scientific notation : 8.394 x 10^9
Answer:
914.946
Explanation:
ahm Im not best math but I have learned this subjects I hope my answer is correct
PLEASE HELP QUICKLY: (FIRST ANSWER GETS BRAINLIEST)
The breakup of Pangaea occurred during the _____.
Cambrian period
Mesozoic era
Paleozoic era
Answers
Answer:
Mesozoic
Explanation:
The early jurassic is when it started to break
Answer:
How did the breakup of Pangaea affect land organisms during the Mesozoic Era? The breakup of Pangaea into Laurasia and Gondwanaland resulted in climate change. Only the animals that were able to adapt to the new climate conditions survived the mass extinction.
Explanation:
right on edg
What affect do enzymes have on chemical reactions?
Answers
Answer:
Increases reaction rate by lowring its activation energy.
Explanation:
i.e If the chemical reaction completes in 5 hours it means that reaction's activation energy is very high.This factor causes decrease in rate of reaction so to increase reaction rate and to decrease activation energy enzymes or catalyst are added so now reaction will be completed in half hour.This is the importance of enzymes/catalysts.Enzyme and catalyst cann't start reaction but they increase rate of reaction and decrease time to reach equillibrium.
HELP ME NOW PLEASE !!Mangrove trees are an important part of a mangrove wetland community. Other populations of plants and animals in this community rely on mageove trees for food & shelter. Which of these is a limiting factor on mangrove community populations that is unrelated to the density of mangrove trees?
**look at abcd in the picture**
Answers
Answer:
climate, salt water, tidal fluctuation and soil type
Explanation:
Climate, salt water, tidal fluctuation and soil type are the limiting factors for the mangrove wetland community. mangrove plants only present on wetland regions where the climate is humid. It also grow on the land where saline soil is found but excess saline conditions reduces its normal growth and development. For better growth of mangrove plants, soils made up of sand, silt and clay which are rich in organic matter.
Answer: B- severity of hurricanes
Explanation:
You learned in biology that a cell membrane has a phospholipid bilayer. Why, based on polarity, would this be possible?
Answers
Answer:
Explanation:
this phospholipid layer has 2 layers
hydrophilic head which can react with water " soluble in water "
and hydroPHOBIC tail which can't interact with water " insoluble in water"
Which term identifies a light-absorbing pigment?
photosystem
ferredoxin
thylakoid
chlorophyll
Answers
Chlorophyll is a light-absorbing pigment.
Chlorophyll, the inexperienced pigment commonplace to all photosynthetic cells, absorbs all wavelengths of seen mild besides inexperienced, which it displays. That is why vegetation appears inexperienced to us.
What's the mild absorbing pigment in chloroplast?Chlorophyll, the primary pigment utilized in photosynthesis, reflects inexperienced mild and absorbs pink and blue light most strongly. In flowers, photosynthesis takes region in chloroplasts, which contain chlorophyll.
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air pollution is a
__________ to survival
Answers
Answer:
needed
Explanation:
its pretty mandatory lol
What is the blood flow of the ventricular systole?
What is the blood flow of the diastole?
What if the blood flow of the antrial systole?
Answers
2. it occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body.
3. incorrect question
12 Which of the following describes a form of active transport?
F Oxygen transfers into red blood cells through small gaps in the cell membrane
from oxygen-rich environment surround the cells.
G Large molecules are brought into the cell by wrapping the cell membrane around
the molecules to form a vacuole.
H Water moves across the cell membrane from the side with high osmotic pressure
towards the side with low osmotic pressure.
) Membrane proteins provide a pathway for larger particles to move across the cell
membrane and bring the cell and environment closer to equilibrium.
Answers
Answer: 1. cell wall, membrane, and overall volume are enlarged; chromosomes are duplicated. 2. septum begins to form and chromosomes are pulled to opposite ends of the cell; components are randomly divided. 3. septum is completely formed and the cell membrane begins to patch itself. 4. daughter cells are divided.
Explanation: pls mark me brainliest
What is the process shown by letter A?
Answers
Answer:pensemos
Explanation:
Ajsjjs
Please hurry, I'll give brainliest.
using the chart above, what is the percent of Thymine found in the cow's DNA?
a. 42%
b. 28%
c. 31%
d 22%
Answers
Answer:
What percent of DNA is cytosine?
Together, adenine and thymine compose 70% of the segment. This means that 30% of the section is composed of guanine-cytosine pairs. Since these two bases will be equal in quantity, 15% of the DNA section will be cytosine bases.
Explanation:
Since there are no constructive (volcanic activity) or destructive (erosion) forces at work under the ocean, the ocean floor is flat.
True
False
Answers
False so false
Ik it cant be true because there are underwater volcanoes and the earths plates are constantly moving.
What is produced
during anaerobic
respiration within
human muscle cells?
Answers
Answer:
Without oxygen, pyruvate is converted to lactic acid in animals or ethanol in plants and yeast. It produces only about 10% of the energy released in the complete oxidation of glucose. Anaerobic respiration in humans takes place when muscle undergoes extreme contraction as in vigorous exercise
Explanation:
Hopefully this helped, if not HMU and I will try my best to get u a better answer!
The red structure represents a..... ANSWER AND I WILL MARK BRAINLIEST.
Answers
Answer:
I looked at the picture in your other question and those are chromosomes, so it would be c.
Explanation:
I just did something similar for biology and it had the chromosomes labeled so I'm pretty sure I'm right
Which is one way that the movement of matter through an ecosystem is different from the transfer of energy?
A. Only the movement of matter involves living things.
B. Only the movement of matter flows in one direction only.
C. Only the movement of matter occurs in an unending cycle.
D. Only the movement of matter involves feeding relationships.
Answers
in which states of matter will a substance have a fixed volume
Answers
Answer:
Matter in the solid state maintains a fixed volume and shape and Matter in the liquid state maintains a fixed volume, but has a variable shape that adapts to fit its container
Explanation:
