Answer:
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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.define and give an example of conduction and convection
Answer:
Conduction: This is a flow of heat by direct contact. Heat travels from a warmer object toward a colder object.
Convection: This is a transfer of heat by mixing a fluid. Convection occurs within liquids and gases. Examples include boiling water and when warm water mixes with cold water.
OAmalOHopeO
Soil organisms, such as mycorrhizal fungi, impact the rate of succession in ecosystems. Mycorrhizal fungi have a mutualistic relationship with various species of plants and increase the plant growth and survival. Sand dunes often lack mycorrhizal fungi, and a researcher wanted to determine the effect of adding mycorrhizal species to sand on disturbed beaches on grass growth. The researcher set up various mycorrhizal communities at disturbed beaches in different locations on the east coast of the United States. Identify the independent variable in the study.
Answer:
The amount (number) of mycorrhizal fungi
Explanation:
In a scientific experiment/study, the independent variable is the variable that isn't changed by other variables, while the dependent variable is the variable that is being measured during the experimental procedure. The independent variable is manipulated by the researcher (in this case, the amount of mycorrhizal fungi), thereby affecting the dependent variable (in this case, grass growth). In consequence, a variable is dependent because it 'depends' on the independent variable.
WILL GIVE BRAINLIEST IM ON A TIMER!!! A student completed a lab report. Which correctly describes the difference between the “Question” and “Hypothesis” sections of her report? “Question” states what she is asking, and “Hypothesis” states the result of her experiment. “Question” states what she is asking, and “Hypothesis” states what she thinks the answer to that question is in “if . . . then . . . because” format. “Question” describes what she is trying to find out, and "Hypothesis" states the procedures and methods of data collection. “Question” describes what she is trying to find out, and “Hypothesis” states any additional information or prior knowledge about the question.
question 2
Two abiotic resources that affect an ecosystem are:
A. temperature and animals
B. plants and animals
C. water and bacteria
D. soil and water
I'm giving my 1532 points away.
Identify the characteristics of animal-like protists. Check all that apply.
stationary
able to move using specialized structures
typically autotrophs
unicellular
(Answers: able to move using specialized structures, unicellular)
Answer:
able to move using specialized structures
Explanation:
Animal like protists have ability to move with short cilia and flagella. And they get energy from other source. Explanation: Euglena can moves through flagella and can produced its own food.
lol thanks.
Answer:
able to move using specialized structures, unicellular
Explanation:
easy
Which media format is most likely to be used for personal expression?
A) a blog entry
B) a textbook
C) a press release
Answer:
a
Explanation:
this is because it is based on what the writer wants to show the viewers and sharing opinions.
Answer:
Explanation:
D
WILL AWARD BRAINLIEST
How does evolution unify biological principles
Answer:
Evolution, which provides an explanatory framework for biological phenomena ranging from genes to ecosystems, is the single unifying theory of biology. Evolutionary science explains the unity of life by its history, whereby all species have arisen from common ancestors over the past 4 billion years.
Explanation:
i hope it helps:))
hii! i’ll give brainliest pls help
Answer:
Landslide!
Explanation:
Since the house is build on a hill there is the possiblitie that the house will fall so it has to be landslide. The trees will help the house stay put.
I hope this helped!!
How do fossils show evidence for evolution?
a. They show evidence of species that are now extinct
b. They are the primary source of evidence for natural selection
C. They show that ancient species share similarities of those alive on Earth today
d. Both A and C
When you are tanning yourself on the beach, which part of the atmosphere protects you from the harmful rays of the
sun?
A) stratosphere
B) troposphere
C) mesosphere
D) ionosphere
E) chronosphere
Answer:
b troposphere
Explanation: The Troposphere is level of atmosphere closest to Earth. The Ozone Layer is the part of the atmosphere that protects us from harmful UV rays.
What is the first thing to look for when reviewing a
website with an ".edu" address?
A. Whether the site has been updated recently
B. Whether the site was written by professors
or students
C. Whether the content has been peer
reviewed
D. Whether the site is biased toward the
products or services the company provides
Answer: I think the answer is B.
Explanation:
Help me please fill in the blank for conclusion don’t have a lot of time!
The purpose of this experiment was to find out how _________ affects _____________.
The density of a liquid affects its properties and how it interacts with other liquids.
make a cell rap song?
Answer:
Ayee
I haven't made this one but i know it (If u wanna listen to it just search up Cell City) :
One night in cell city
We're gonna dance until we see the sunlight
The nucleus, like city hall
Holds the cell's information
Mitochondria, a power plant
In charge of energy creation
The Golgi apparatus is like post office
It packages materials and moves them
The ribosome, like a factory
Creating proteins so the cell can use them
Fill in the blank on this paper
Answer:
1. accelerating
2. 0 to 10 m/s
3. constant speed
4. decelerating
5. 10 m/s to rest
6. at rest
7. stopped
8. accelerating
9. increasing
Some animals have an organ called the gizzard. The gizzard is muscular and helps to crush up hard food. Earthworms and many birds, including chickens, have gizzards. Chickens swallow small rocks that help the gizzard to grind up food. Did plant-eating dinosaurs have gizzards too? No one has found an actual dinosaur gizzard, but they have found small piles of round rocks inside dinosaurs’ ribcages.
Based on its function, the gizzard is part of the
system.
Answer:fg
Explanation:
Bhuhhhfvg
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.
PLEASE HELP!!! URGENT, ILL GIVE YOU BRAINLIEST!!!
Using the example of the digestion of food in the human digestive system, explain why enzymes are
important for life processes.
-Explain-
NO LINKS PLEASE!!!!!
Answer:
Digestive enzymes play a key role in breaking down the food you eat. These proteins speed up chemical reactions that turn nutrients into substances that your digestive tract can absorb. Your saliva has digestive enzymes in it. Some of your organs, including your pancreas, gallbladder, and liver, also release them.
When rocks and minerals are worn and broken down into small pieces by water, wind, or ice, the resulting particles are called ?
Sand i think? Maybe dust tho if sand isnt an option
Explanation:
The resulting particles are called sediments.
Rocks and minerals are disintegrated by agents of weathering such as water, glacial (ice) and wind. When these agents of weathering act on rock and minerals, they break down into small particles. These small pieces of weathered rocks and minerals is what is called sediments.
Sediments are pieces of weathered materials from rocks and minerals which can be carried by agents of erosion and deposited in another location.
Thus, the resulting particles from the breakdown of rocks and minerals are called sediments.
Learn more about sediments here:
https://brainly.com/question/11316458
All organisms in the kingdoms Eubacteria and Archaebacteria ____________?
A.multicellular organisms.
B.are autotrophs
C.prokaryotes.
D.are heterotrophs
Answer:
C
Explanation:
A prokaryote is a typically unicellular organism that lacks a nuclear membrane-enclosed nucleus.
Help please someone please what is the answer
What is a tide?
A.an extreme pull from the gasity of the Sun
B.something that happens to the ocean every two days
C.a cyclical pattern of temperatures in seas and oceans
D. a continua rise and fall of water in seas and oceans
Answer:
D. a continuous rise and fall of water in season oceans
During a solar eclipse does Earth casts a shadow on the Moon or does the Moon cast a shadow on the earth?
Answer:
the Moon casts a shadow on the earth.
Help please someone please what is the answer
Answer:
True
Explanation:2.5% is in glaciers, polar ice caps, and the atmosphere. The other 0.5% is available.
True or False: Sustainability focuses on reducing the amount of nonrenewable resources used, which prevents the depletion of natural resources.
what is food poisoning
Explanation:
Food poisoning is a illness that can caused by poisonous or contaminated food.
Why is mitosis necessary during the development of a human?
Answer:
Mitosis is a way of making more cells that are genetically the same as the parent cell. It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Mitosis produces new cells, and replaces cells that are old, lost or damaged.
Explanation:
Most cells spend most of their life in:
A. interphase
B. cytokinesis
Answer: Interphase
Explanation:
Answer:
A. Interphase
Explanation:
I hope this help ;)
What happen after you drink mineral water, does it go to kidney and how it get removed
Answer:
dont know hope it helpsjcjdjc
Hypothesis: If the porosity of three soils are tested, then red clay soil will have the lowest porosity.
Answer:
This question is incomplete, based on the given hypothesis, the question is asking to identify the variables (independent and dependent) of the experiment.
*Independent variable: DIFFERENT SOILS
*Dependent variable: Porosity
Explanation:
- Independent variable is the variable that is manipulated or changed by an experimenter in order to effect a response in another variable. In this question, three different soils were used, hence, the SOIL is the independent variable.
- Dependent variable is the variable that responds to changes made to the independent variable. It is the variable being measured in an experiment. In this case, the porosity is the variable being measured, hence, it is the dependent variable.