Answer: 256 bacterium.
Explanation:
suppose a bacterium would divide once in every half an hour, this means it would be double in half an hour.
therefore, a number of the bacterium after half an hour will be 1 x 2 = 2.
After one hour, we would have doubled the number of bacterium =2 x 2
= 4.
Also, in one and a half hours, it would become 4 x 2
= 8.
In 2 hours, it would be 8 x 2 = 16.
Also in two and half hours, it would be 16 x 2
= 32.
In three hours, it would be 32 x 2
= 64.
In three and a half hours, it would be 64 x 2
= 128.
Funally, in four hours, the number of bacterium would have been multiplied to 128 x 2
= 256.
It takes just four hours for one bacterium to become 256 bacteria.
It should be noted that a bacterium will divide once in every half an hour. This implies that it'll be double in every half hour. Therefore, for an hour, there'll be 2 bacterium.
Since it doubles every half hour, in 2 hours, the value will be 16 bacteria. Therefore, the value in four hours will simply be:
= 16 × 16 = 256 bacterium.
Therefore, it takes just four hours for one bacterium to become 256 bacteria.
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Which option correctly describes the role of the nucleus in the cell?
The nucleus controls the making of proteins.
The nucleus controls the storage of food and water.
The nucleus controls the production of energy within the cell.
The nucleus controls the breakdown of old cell parts.
Functions of the nucleus:
control of the genetical information of the cell and the heredity characteristics of an organism
control of the protein and enzyme synthesis
control of cell division and cell growth
storage of DNA, RNA and ribosome
regulation of the transcription of the mRNA to protein
production of ribosomes
Answer: The nucleus controls the making of proteins.
Why can't two person's from the same family have children together?
Answer:
They can have children together. If they are married or in a relationship they can do anything they want together including the want of children.
Explanation:
How does a Evolution start
Answer with change in the environment organisms change to adapt to the change in of the enviroment .
due date today 1:00 pam
Answer:
The amount of light that a plant has determines how much the plant grows, plants need sunlight for photosynthesis, and photosynthesis is how they make food so if a plant has little to no sun it won't grow well.
Can someone please help I’ll give brainliest!
The questions are:
1. What are the constants (variables that stay the same- also called controlled variables)?
2. What is the independent variable ?
3. What is the dependent variable?
4. What flaw in the design of the experiment can you find ? Explain .
5. What hypothesis do you think the scientists are trying to test?
Answer:
Explanation:
1) The constants: hours of lgiht per day, their food, wheel for exercise, and cage size
2) Independant variable: temperature
3) Dependant Variable: weight and length
4) Flaw: The mice groups have different amounts of mice. Group 1 has three, group 2 has four and group 3 has two. All groups should have the same number of mice, in this case three mice per group.
5) Does the temperature of a mouse's cage affect their weight and length?
Hope this at least helps!
Genetic screening allows
a. parents to analyze the risk of certain diseases in their unborn child
b. scientists to remove the genetic disorders from unborn children
c. doctors to predict the life span of any person
d. any person to be cured of an inherited disease or disorder
Answer:
Answer is d
Explanation:
Genetic testing can reveal changes (mutations) in your genes that may cause illness or disease. Although genetic testing can provide important information for diagnosing, treating and preventing illness, there are limitations.
To test the effectiveness of a new nutrient supplement, one group of identical mice is given the supplement, and the other group is not given anything. Which is the most complete list of the parts of an experiment presented in this scenario? independent variable, dependent variable control group, experimental group, dependent variable independent variable, control group, experimental group control group, experimental group
Answer:
The answer is the second option: Dependent variable, experimental group and control group
Explanation:
Let's list out all possible variables/groups in the option
Independent variable: This is a variable that is intentionally (directly or indirectly) altered by the one doing the experiment but is not affected by any variable/group during the course of the experiment. No Independent variable was mentioned.
Dependent variable: This is a variable that is affected by another variable and is usually the variable been tested during the course of an experiment. The dependent variable here is the effectiveness of a new nutrient supplement.
Experimental group: This is the group that is being treated during the course of an experiment. The experimental group here is the group of identical mice given the supplement.
Control group: This is a reference group that is not given any treatment during the course of an experiment. The control group here is the group of identical mice not given anything.
From the above description, it can be deduced that the parts of the experiment described in the scenario in the question is dependent variable, experimental group and control group.
Answer:
B :)
Explanation:
for people who speed run
Collecting research data is the final step in the scientific method.
true or false
Answer:
False
Explanation:
Edg
Collecting research data is not the final step of the scientific method. Deriving a conclusion from the collected data is the final step. Hence, it is false.
What are the steps in a scientific method?The scientific method is a process in which data is collected, observed and then a conclusion is derived. The scientific method is a very useful method in technology, computers, and business.
The following steps are involved in the scientific method:
First of all, is asking a questionCollecting dataPerform researchEstablish hypothesisConduct an experiment to test the hypothesisMake an observationAnalyze the resultDerive conclusion.Deriving a conclusion is the last step in the scientific method, while data collection is the most important step in data collection.
Therefore, collecting research data is not the final step and it is false.
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Inflammation of the fibrous connective tissue of the subcutaneous layer of skin is the ____
the answer to your question should be hypodermis
tell me if im wrong, if not, brainliest plsss?
3.
Which level of organization is made of many different organs working together
to perform a BIG job for your body, like digesting your food?
The correct answer is organ system.
Which uses electromagnetic radiation to discover the properties and composition of bodies in space? space probe space station space shuttle space observatory
Answer:
Space observatory.
Explanation:
Space observatory uses electromagnetic radiation to discover the properties and composition of bodies in space because it is a telescope that is found in the outer space to check galaxies ,distance planets, and some other astronomical objects and it is sensitive to different electromagnetic spectrum in space and its wavelengths allow lights to get through the Earth's atmosphere.
Answer:
Space observatory
Explanation:
Explain- the 8 characteristics that are required for life
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these eight characteristics serve to define life.
Explanation:
Sensitivity or Response to Stimuli
Organisms can respond to diverse stimuli. For example, plants can grow toward a source of light, climb on fences and walls, or respond to touch. Even tiny bacteria can move toward or away from chemicals (a process called chemotaxis) or light (phototaxis). Movement toward a stimulus is considered a positive response, while movement away from a stimulus is considered a negative response.
Reproduction
Single-celled organisms reproduce by first duplicating their DNA. They then divide it equally as the cell prepares to divide to form two new cells. Multicellular organisms often produce specialized reproductive germline cells that will form new individuals. When reproduction occurs, genes containing DNA are passed along to an organism’s offspring. These genes ensure that the offspring will belong to the same species and will have similar characteristics, such as size and shape.
Growth and Development
All organisms grow and develop following specific instructions coded for by their genes. These genes provide instructions that will direct cellular growth and development, ensuring that a species’ young will grow up to exhibit many of the same characteristics as its parents.
Regulation
Even the smallest organisms are complex and require multiple regulatory mechanisms to coordinate internal functions, respond to stimuli, and cope with environmental stresses. Two examples of internal functions regulated in an organism are nutrient transport and blood flow. Organs (groups of tissues working together) perform specific functions, such as carrying oxygen throughout the body, removing wastes, delivering nutrients to every cell, and cooling the body.
Homeostasis
In order to function properly, cells need to have appropriate conditions such as proper temperature, pH, and appropriate concentration of diverse chemicals. These conditions may, however, change from one moment to the next. Organisms are able to maintain internal conditions within a narrow range almost constantly, despite environmental changes, through homeostasis (literally, “steady state”)—the ability of an organism to maintain constant internal conditions. For example, an organism needs to regulate body temperature through a process known as thermoregulation. Organisms that live in cold climates, such as the polar bear, have body structures that help them withstand low temperatures and conserve body heat. Structures that aid in this type of insulation include fur, feathers, blubber, and fat. In hot climates, organisms have methods (such as perspiration in humans or panting in dogs) that help them to shed excess body heat.
Energy Processing
All organisms use a source of energy for their metabolic activities. Some organisms capture energy from the sun and convert it into chemical energy in food; others use chemical energy in molecules they take in as food.
Evolution
As a population of organisms interacts with the environment, individuals with traits that contribute to reproduction and survival in that particular environment will leave more offspring. Over time those advantageous traits (called adaptations ) will become more common in the population. This process, change over time, is called evolution, and it is one of the processes that explain the diverse species seen in biology. Adaptations help organisms survive in their ecological niches, and adaptive traits may be structural, behavioral, or physiological; as such, adaptations frequently involve other properties of organisms such as homeostasis, reproduction, and growth and development.
 what are the similarities and differences between Atoms and molecules?
Answer:
Physical matter is made up of atoms and molecules. An atom is the sub-component of a molecule, or the smallest unit of matter. It is the smallest part an element can divide into. A molecule is made up of atoms that are bound by ionic, covalent or metallic bond.
Hope this helps :)
Explanation:
Difference
atom is the smallest unit of an element that can or cannot exist freely whilst on the other hand, a molecule is a set of atoms that are held together with the help of a bond and is the smallest unit of a compound.
Similarities
both atoms and molecules react with each other and other molecules and atoms.
which of the following are protective barriers that are part of the body's immune system
what must happen before a chemical recreation can begin?
Answer:
The activation energy must be reached. The catalyst makes lower energy pathways available.
Explanation:
what happened during the industrial revolution that led human activity to contribute to climate change?
Answer:
Explanation:
Since the Industrial Revolution began around 1750, human activities have contributed substantially to climate change by adding CO2 and other heat-trapping gases to the atmosphere. These greenhouse gas emissions have increased the greenhouse effect and caused Earth's surface temperature to rise
Answer:
human activities have contributed substantially to climate change by adding CO2 and other heat-trapping gases to the atmosphere.
Explanation:
gas emissions have increased the greenhouse effect and caused Earth's surface temperature to rise
The _____________ model is a model proposed by Nicholaus Copernicus, a Polish cleric, around 1500. His model proposed that all the planets revolve around the Sun and the moon revolves around Earth
what helps plant cells divide and is located primarily in roots and fruits?
Answer:
The answer is cytokinin
Explanation:
Cytokinin is a plant hormone located in roots and fruits and it promotes cell division.
1 Which of the following is an example of decreasing thermal energy causing matter to
change?
A A crayon melts in a hot car.
B A puddle evaporates on a hot day.
C Water becomes ice in the freezer.
D A marshmallow turns brown when heated.
Answer:
C. Water becomes ice in the freezer
Explanation:
Thermal energy is basically heat, so decreasing thermal energy is decreasing heat, or something getting COLDER. In the other three examples, they are all getting WARMER.
What would most likely happen if an error occurred when RNA was receiving coding information?
Answer:
Proteins would be formed incorrectly
Explanation:
Answer:
The answer is A- Proteins would be formed incorrectly.
Explanation:
Got it right on edge
What information cannot be studied effectively using human torso models? I. the approximate sizes of organs II. the textures of organs III. the interrelationships of organ functions IV. the positions of organs within the body
Answer:
II. the textures of organs
Explanation:
A human torso model is designed to be as accurate as possible so that students/researchers can understand the inner workings of the body. Therefore, the organs have been designed to be the same size of an actual human being of that stature, while also being in the correct position within the body to better understand the interrelationships between the organs. The only thing that is not accurate in these models is the texture of the organs as most are smooth plastic unlike the actual organs.
Answer: ll and lll only
Explanation:
In an experiment, the independent variable is the variable that
Answer:
It is a variable that can be changed or controlled
Omar wants to determine if the mass of a model rocket affects how long the rocket is able to stay up in the air. To do this, he constructs three identical rockets and then fills two of the rockets with varying amounts of sand to add mass. He then launches the rockets one at a time and times how long they are able to stay airborne.
What is the test variable (independent variable) in Omar's experiment?
Answer: To do this, he constructs three identical rockets and then fills two of the rockets with varying amounts of sand to add mass.
Explanation:
define electric potential of 1 volt
Answer:
Explanation:
one volt is the potential difference between two points in electric field if one joule of work is done to move a charge of one coulomb from one point to another point against the electric intensity
1v=1w/1q
When microscopes were first used hundreds of years ago, scientists discovered that a single drop of water contains many particles that the human eye is unable to detect on its own. The microscopes used today are much more powerful and have allowed scientists to make discoveries about smaller living things, such as how germs can make people sick. Which statement best describes the use of microscopes over the last several hundred years?
Answer:
a
Explanation:
edge
When microscopes were first used hundreds of years ago, scientists discovered that a single drop of water contains many particles that the human eye is unable to detect on its own. This statement best describes the use of microscopes over the last several hundred years. Thus, option A is correct.
What are the theories related to microphones?
The statement that best describes the development of the theories that has been connected microscopic as well as macroscopic phenomena has took several hundred years for the scientists just to develop current theories, as well as they are still being revised to this same process.
Most of the scientific theories has been involving the microscopic and the macroscopic phenomenon which have been taken several years to be developed atlast however, this theories are still under revision till date. The microscopes used today are much more powerful and have allowed scientists to make discoveries about smaller living things.
Therefore, This statement best describes the use of microscopes over the last several hundred years. Thus, option A is correct.
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Black walnut trees produce a nontoxic chemical that becomes highly toxic when it is exposed to air or soil. How does this chemical help black walnut trees compete with plants growing nearby?
Answer:
By attracting herbivores to the other plants
Explanation:
How can cells increase their surface area?
Answer:
They take gravity
Explanation:
1.)_____ is an accepted explanation of an observed phenomenon supported by empirical data. Is it THEORY OR LAW?
Answer: Law
Explanation: I just did this test
Secondary succession can happen after primary succession or independently of primary succession.
Please select the best answer from the choices provided
ОТ
OF
Answer:
it is true
Explanation:
i took the quiz
False. Secondary succession does not happen after primary succession or independently of primary succession.
What is secondary succession?Secondary succession is the process of ecological succession that occurs after a disturbance has disrupted an existing ecosystem, but left some soil and seed sources intact. Unlike primary succession, which starts with bare rock or soil with no living organisms, secondary succession begins in areas where there was already an established community of plants and animals.
Examples of disturbances that can lead to secondary succession include forest fires, landslides, and farming practices that disturb the soil. The process of secondary succession involves the gradual recolonization of the area by plants and animals, with different species replacing one another as the ecosystem gradually returns to a stable state.
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A motorbike travels 45 miles in 3 hours, what is its speed ????
Answer:
speed = distance/ time= 45/3 = 15miles per hour
Explanation:
Formula of speed = distance / time
Distance = 45 miles
Time = 3 hrs
=45/3 = 15 miles
Therefore for 1hr 15miles