The diagram below represents some changes that took place in a bacterial population recently exposed to an antibiotic.Which statement would best explain the presence of bacteria on day 4?A) A bacterial population cannot survive exposure to antibiotics.B) This bacterial population cannot survive exposure to this antibiotic.C) Bacteria can change whenever it is necessary to survive antibiotic treatment.D) Some of the bacterial population was resistant to this antibiotic.
About the question:
You will find the diagram used to answer the question in the attached files.
Answer:
D) Some of the bacterial population was resistant to this antibiotic.
Explanation:
The term resistance refers to an inheritable change in a population sensitivity, reflected through the consecutive failure of the chemical effects, correctly used to reach a desired effect on the target population.
The excessive use of antibiotics on the bacteria population leads to the fixation of new mutated genes -by natural selection-. The mutated genes make these cells even more resistant to the drug.
In the exposed example we have,
Day 1 ⇒ a big population of white bacteria and only one black cell, probably carrying mutated genetic material.The population was treated with antibiotics.
Day 2 ⇒ there are fewer white bacteria and three black cells. This means that white bacteria are dying, while the black ones are reproducing.The mutated phenotype gets to survive under the effects of the chemical.
Day 3 ⇒ There are no more white bacteria. Only the black population survived and keeps reproducing.The mutated bacteria reproduce with the capability of tolerating the antibiotic dose that is usually used to destroy a population of white bacteria.
Day 4 ⇒ Black bacteria got to survive a produce a big population. Remember that bacteria follow the exponential growth model, meaning that their reproductive rate is too high. This black population survived the antibiotic action and reproduced at high rates.1. What is the solid portion of smog called?
air pollution
dirt
oxygen
particulates
Answer:
particulates
Explanation:
maybe you could give that a second guess....
Answer: particulates
Explanation: i took the quiz
In horses, black coloring (B) is dominant, and chestnut coloring (b) is recessive. What percentage of offspring are expected to be chestnut?
Answer:
This question is incomplete, the complete question is as follows:
- In horses, black coloring (B) is dominant, and chestnut coloring (b) is recessive. A homzygous black horse crosses with a chestnut horse.
What percentage of offspring are expected to be chestnut?
The answer is 0%
Explanation:
This question involves a gene coding for color in horses. The allele for black coloring (B) is dominant over the allele for chestnut coloring (b) is recessive.
According to this question, if a homzygous black horse (BB) crosses with a chestnut horse (bb), the following gamete will be produced by each parent;
BB - B only
bb - b only
Using these gametes in a punnet square, the following proportion of offsprings will be produced:
Bb, Bb, Bb, Bb
All of these offsprings are phenotypically black colored although heterozygous in genotype. Hence, 0% of offspring are expected to be chestnut.
Answer:
its 0% love
Explanation:
Dont waste answers Its biology
Answer:
1. The process shown is Biological Process
2. Planting seeds
3. Lichens, mosses, algae etc.
4. Hardwood forest stage
5. 10 - 20 years
HELLPPPP ITS THE HIGHLIGHTED ONE
I think it would be the first ones with lower o2 because fish dont breathe oxygene
Answer:
it would be the one with more oxygen because they would thrive more
Explanation:
Describe the difference in how energy is transferred to producers and consumers
Answer:
Producers create their own energy using photosyntehsis. They absorb light and water to make glucose. Consumers have to eat, they can't make their own energy.
Explanation:
If a red cow (hom0zygous dominant) is crossed with a white cow (hom0zygous dominant), what alleles will the offspring have?
Rw
RW
rW
rw
Answer:
RW
Explanation:
Captial letters are dominant and because both cows are hom0zygous dominant, the offspring will inherit one white dominant allele and one dominant red allele.
Answer: The answer is B: RW
Explanation: Edge 2021
While all zebras have stripes, no two zebras share the same stripe pattern. adap
you have to addd more
Explanation:
you have to add more to your question, its is hard to answer
What produces enzymes?
~There are 8 letters
~ 2nd letter is an “A”
~ 5th letter is a “R”
Answer:
Pancreas
Explanation:
What does bile help absorb into the bloodstream?
Guard cells
2 points
1. Series of reactions in which a molecule of glucose is broken down.
2. Stomata are flanked by them, and they swell or shrink by taking in or losing water.
3. Process that doesn't need oxygen.
4. Plant capable of synthesizing its own food from simple organic substances.
What happens when cells grow out of control?
what happens when a light beam passes from air in water?
A The light speeds up
B all of the light is absorbed
C The light is bent and transmitted
D The light is reflected
Answer:
Refraction
Explanation:
C. The light is bent and transmitted
what happens if an event is so frequent or so dramatic that the ecosystem can not recover
Global economic development has led to an increase in the use of fossil fuels
worldwide. Which of the following would be the best solution to this global
economic problem?
A. Encouraging developing countries to participate in global trade
B. Establishing international agreements to prevent overfishing
C. Forming strict regulations on greenhouse gas emissions
D. Creating an international seed bank to protect biodiversity
SUBMIT
Answer: C
Explanation: I think it’s C because there were like strict regulations on greenhpuse gas emissions.
1. John and Aubrey are trying to decide where to go for dinner. John says he wants Chinese. He
knows Aubrey doesn't really like Chinese but he is in the mood for it. Aubrey tells him she'd
rather have something else. John gets agitated and starts telling her she is just being selfish.
Aubrey backs down and agrees to eat Chinese just so he will stop yelling at her. John then kisses
her, smiles, and says, “I knew you loved me". This is an example of an abusive relationship.
O true
false
Answer:
true
Explanation:
Just because he told she's being selfish ext.. lol it's not normal
Select all that apply: Meiosis increases diversity in a populations by way of *
Mutation
Independent Assortment
Crossing Over
Random Fertilization
what happens if i fail science eoc in 8th grade in florida
Answer:
Theyll make you take a course in summer school or pass you if your grade in the class is high enough speaking from experience middle school grades dont count
Explanation:
The EOC (end of course assessment) won't make you fail.
It's a test that lets the teachers see your performance and how well do you know what they taught you.
But still, be sure to do your best and answer what you know.
how would you check that the destarching had been effective
Answer:
Test a leaf or two for the presence of starch in order to determine whether the plant is completely destarched. If a positive result is obtained - leaves turn blue-black, the plant should be left under in the cupboard or under the coverd bell jar for longer, until a negative result- no colour change - is obtained.
name the nitrogenous Waste excreted by the following organisms;desert mole marine fish and tilapia
Answer:
Answer: Desert mole excretes concentrated urine with urea. Marine fish excretes urine with uric acid. Tilapia excretes dilute urine with amino acids.
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]
Desert mole excretes concentrated urine with urea. Marine fish excretes urine with uric acid. Tilapia excretes dilute urine with amino acids.
ThanksHope it helpsWhen a scientist uses radiometric dating to determine the age of a rock specimen, would he use a radioactive element with a short half life, say a half-life of less than 10,000 years, or a radioactive element with a long half-life, say a half-life greater than 1 billion years?
Answer:
He will use a radioactive element with a long half life of greater than 1 billion years
Explanation:
Rocks are an aggregation of solid mass which is usually rich in minerals. The age of rocks is established using radiometric dating method.
According to Oxford Dictionary, radiometric dating is "a method of dating geological specimens by determining the relative proportions of particular radioactive isotopes present in a sample."
The age of rocks can only be ascertained using isotopes that have very long half lives because many of these rocks are very old (aged billions of years) hence their age can only be determined using elements that has a half life greater than 1 billion years.
True of false? The most specialized cells, such as muscle cells and nerve cells, do not go through mitosis and do not divide at all.
True
False
The National Wildlife Refuge supports _______ wildlife refuges.
a.
150
b.
37
c.
550
d.
227
Please select the best answer from the choices provided
A
B
C
D
Answer:
answer b is the correct of this question
Very easy answer, I will give Brainliest! What is the name of this process? Click the picture above to view.
Answer: Not exactly sure of the specific name of the process, but the picture shows how the sun provides healthy sunlight with the ozone absorbing some of the radiation
Explanation:
Describe the lysogenic cycle. Write a paragraph. Please don't copy and paste answers. Thank you.
Answer:
The viral DNA is inserted into the DNA of the host during the lysogenic cycle; however, viral genes are not expressed. During each cell division, the prophet is transmitted to daughter cells. The prophet leaves bacterial DNA after some time and passes through the lytic cycle to create more viruses. hope this helps Explanation:
Answer:
I have absolutely no clue
Explanation:
Because i'm a friend and you'll love me anyways Unu
Please help me to solve this question.
Answer:
i. Liver
ii. Heart Muscle, involuntary
iii. The cardiac muscle cell has one central nucleus, like smooth muscle, but it also is striated, like skeletal muscle. The cardiac muscle cell is rectangular in shape. The contraction of cardiac muscle is involuntary, strong, and rhythmical.
Explanation:
Describe the importance of Tiktaalik roseae to the study of evolution.
Answer:The discovery of well-preserved pelves and a partial pelvic fin from Tiktaalik roseae, a 375 million-year-old transitional species between fish and the first legged animals, reveals that the evolution of hind legs actually began as enhanced hind fins.
Explanation:can i have brainless?
Tiktaalik roseae was famous for his discovery of well-preserved pelves and a partial pelvic fin in aquatic organisms. These structures support aquatic organisms to a large extent.
What is Evolution?Evolution may be defined as a methodology through which gradual changes in organisms may take place over many generations. Due to this, a species of animals, plants, or insects slowly change some of their physical characteristics and adapt to nature.
According to the context of this question, it was the time of about 3.75 million years ago, when the transition between fish and first-legged animals was observed. This observation clearly demonstrates that the evolution of hind legs in the animals was actually initiated through the hind fins of the fish.
Therefore, the importance of Tiktaalik roseae to the study of evolution is understood by the fact of describing well-preserved pelves and a partial pelvic fin in aquatic organisms.
To learn more about Evolution, refer to the link:
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Which type of energy does Earth receive from the sun?
A. Thermal
B. Kinetic
C. Chemical
D. Mechanical
Answer: it is A thermal energy
Explanation:
1. A protein in a cell membrane changed its
shape to move sodium and potassium ions
against their concentration gradients. Which on
molecule was most likely used by the protein
as an energy source?
A. ATP
B. ADP
C. catalase
D. amylase
Answer:
B. Lactic acid is produced
Fill in the gap to complete the sentence below. A mineral is an essential nutrient that is needed in ____ amounts.
Answer:
Considerate???
Explanation:
You cant have to many minerals and you cant have to little
In the statement, "A mineral is an essential nutrient that is needed in." the given blank can be filled with "small amount."
A mineral is an inorganic solid that forms in nature and has a distinct chemical makeup and crystalline structure.
The body requires trace amounts of minerals in order to function effectively. They play a role in several body processes, such as blood clotting, nerve health, and bone health.
Calcium, iron, magnesium, potassium, and zinc are a few of the essential minerals for human health. Fruits, vegetables, whole grains, dairy products, and other foods that contain these minerals.
Therefore, "Small amount" can be entered in the given blank.
Learn more about nutrient here;
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