Answer:
life appeared 500 million years after the formation of earth. i.e. almost 4 billion years back.
1.4.2 Test (CST): Computer-Scored Unit Test
Question 4 of 25
A scientist did an experiment to see what type of water people preferred. She
hypothesized that most people would prefer bottled water. She did a blind
taste test with 500 people and put her results in the table below.
Number of people
who preferred
bottled water
Number of people
who preferred tap
Number of people who could
not taste the difference
between bottled and tap water
water
Which is not an example of matter and energy cycling through living things?
A wind blowing would be the right solution, as it's not an example of which value and energy cycling's happening through living items. Mortal sitting vegetables involve energy transfer between diverse trophic levels.
identify structure 1 and describe its main function.
identify structure 3 and describe its main function.
Structure 1 is the "cell wall"
Cell wall functions are:-
1. Provide support and limited plasticity.
2. Prevent loss of water
3. Protects from insects and pathogens
4. Prevent over expansion caused by too much water
5.Keep the shape of the plant
6. Allow plants to grow to great heights.
Structure 2 is the "vacuole"
vacuole functions are as follows:-
1.The main function of vacuoles is the storage of many important molecules like amino acids, sugars, various organic acids, and some proteins.
2. In plants, the vacuoles are very large in size and filled with cell sap that helps to maintain the trugidity and rigidity of the cell.
Which of the following processes are involved in the loss of water from the leaves of plants?
1 diffusion
2 osmosis
3 condensation
4 evaporation
A 1 and 3
B
1 only
C 4 only
D 1 and 4
Answer:
D
Explanation:
The diploid number of chromosomes in humans (homo sapiens) is 46 and the diploid number of chromosomes in rice (oryza sativa) is 24. What does this indicate about diploid chromosome numbers?
For humans, the diploid chromosome number equation is 2n = 46 because humans have two sets of 23 chromosomes The diploid chromosome number varies by organism and ranges from 10 to 50 chromosomes per cell.
What is Mitosis?Mitosis is a type of cell division that occurs in somatic or body cells. In mitosis, and a cell undergoes division to produce two daughter cells each with the same number of chromosome as the parent cells.
Mitosis produces diploid cells and diploid cells are cells that have the same number of chromosomes as the parent cell.
Thus, The diploid chromosome number varies by organism and ranges from 10 to 50 chromosomes per cell.
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The model shows an intended destination, a, of wind from the north pole. the actual destination is b. what is the reason for this difference? a. coriolis effect b. changes in salinity c. evaporation d. water cycle
The model shows the intended destination, a, of wind from the north pole and the actual destination is because of the coriolis effect.
What is the coriolis effect?The term coriolis effect has to do with the patterns in which the motion of an object that is not connected to the ground is deflected. It is connected to the description of weather patterns.
Hence, the model shows the intended destination, a, of wind from the north pole and the actual destination is b because of the coriolis effect.
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Answer:The answer is A
Explanation:
I Got it right on the test
anyone know good studying tips?
If your teacher gives a study sheet then study that everyday for 30min or 20min or you can go on a web called quizlet and write the study set you want and they might have it. Or if its on a person just study the person on the web. On wikipedia or other resources with good info on the person.
Carbon can be found in shells and
rock at the bottom of
sedimentary
oceans in the form of...
A. carbonic acid.
B. calcium carbonate.
C. carbon dioxide.
ہے
Answer:
B IS THE ANSWER
Explanation:
I THINK SO
Which action has a positive effect on air resources?
using fossil fuels
building new homes
walking to work or school
removing vegetation such as trees
Answer:
Person above me or below me is correct :)
Explanation:
The answer is C !!
- Have a good summer :)
Utilising fossil fuels has a detrimental impact on air quality because they produce dangerous pollutants like carbon dioxide and nitrogen oxides when they are burned.
What are the contaminants linking to the air pollution ?These contaminants are linked to higher air pollution levels, which can lead to a variety of health problems, such as heart disease and respiratory disorders. The effects of new house construction on air resources are complex.
On the one hand, since burning fossil fuels for energy and releasing building materials can result in the emission of hazardous chemicals, construction may increase air pollution. On the other side, if new homes are constructed in places with fewer air pollution, as in rural regions, they may result in better air quality.
A benefit of walking to work or school an advantage for air resources. Walking does not emit any pollutants into the air, making it a zero-emission mode of transportation.
Additionally, walking lessens traffic on the roadways, which can lessen vehicle-related air pollution. Air resources may suffer if trees or other vegetation are removed. By providing shade, trees not only assist to filter airborne pollutants, but they also help to chill the air. Because air pollutants are not being filtered out as well when trees are cut down, this might result in higher air pollution levels.
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Hi, I just need some help to see if it is all correct answers soon please help me!!!!!!!
Well basing of what I'm seeing, these answers seem to be correct :)
Which of the following is an example of a response to a stimulus?
The pupil of one eye decreases in size when it is shined with a bright light.
A leaf absorbs sunlight in the morning.
the water level of a pond rises on a rainy day
A dead tree rots after many years.
Answer:
A
Explanation:
I think it is A, I'm not very sure
A car travels 1300 km in 12 hours. What is its average speed?
The average speed by which the car travels according to the given scenario is 108.3 km/hr.
What is speed?The actual Speed is the calculated speed of the axis as determined by the change in the Transducer Counts status register. Actual Speed is measured in position units per second.
It can be calculated as total distance divided by the total time taken.
According to the given data:
The distance is 1300 km.
Time taken is 12 hrs.
[tex]Average speed = \frac{1300}{12} km/hrs[/tex]
Average speed = 108.33 km/hrs.
Thus, the average speed by which the car travels according to the given scenario is 108.3 km/hr.
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Why do you think China’s One Child Policy or other similar policies like India’s two child policy have caused a lot of controversy?
Answer:
The one-child policy was a program in China that limited most Chinese families to one child each. It was implemented nationwide by the Chinese government in 1980, and it ended in 2016. The policy was enacted to address the growth rate of the country's population, which the government viewed as being too rapid.
Explanation:
Name the type of connective tissue that anchors the ribs onto the sternum.
Hyaline cartilage makes up the costal cartilage that holds the ribs to the sternum. The most prevalent form of cartilage in the body is hyaline cartilage.
What is hyaline cartilage?On the articulating surfaces of bones, in the larynx, trachea, and bronchi, as well as on the sternal ends of the ribs, hyaline cartilage is present. It imparts a rigid yet malleable form to the constructions.
Hyaline structures are connective tissues that anchor the ribs onto the sternum. Such structures and joints are robust because collagen fibers are present, but their mobility and flexibility are constrained. To reduce friction and provide cushioning at the joint surface, articular cartilage, also known as hyaline cartilage, covers the ends of bones.
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Why is special about dialysis tubing being that it is good to be used in this experiment about osmosis?
Answer: That the dialysis tubing is a semipermeable membrane. Water molecules can pass through the membrane. The salt ions can not pass through the membrane.
Explanation: :)
An investigator would like to initiate a study to determine if the epidemiology of HIV infection is different in prisoner populations from that in non-prisoner populations. Which category might this research fall under
The scientific research category under which this research might fall is Correlational (causative) research.
What is Correlational research?Correlational research is a type of scientific research in which variables are correlated in some way.
In this case, the condition of the individual (prisoners/non-prisoners) might be correlated to the causal of the HIV condition.
In conclusion, the scientific research category under which this research might fall is Correlational (causative) research.
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2 When a plant dies, the materials in the plant?
(1) are lost forever
(2) usually become fossils
(3) are recycled by decomposers
(4) react with carbon dioxide
Explanation:
it releases Carbon Dioxide into the atmoshphere
During respiration, what do consumers such as animals release?.
Answer:
carbondioxide
Explanation:
during respiration consumers release carbondioxide an inhale oxygen
Which describes how mRNA is used by a cell? OA. It is used to check DNA for mutations. OB. It is used to move information to other cells. OC. It is used to replicate DNA for mitosis. OD. It is used to transfer genetic information.
Answer: D) it is used to transfer genetic info
Explanation: :)
The right response is OD. Genetic data is transferred through it. A specific kind of RNA molecule known as messenger RNA (mRNA) is in charge of transmitting genetic data from DNA to the ribosome, a cellular component in charge of creating proteins.
What is mRNA ?The single-stranded nucleotide molecule known as messenger RNA (mRNA) is translated from DNA. The ribosome then converts the sequence of amino acids, which serve as the building blocks for proteins, from the mRNA. When genes are expressed, which is the process of turning DNA-stored information into proteins, mRNA plays a crucial role.
The genetic information contained in DNA and the cell's machinery for protein synthesis are connected through mRNA. Involvement of mRNA in transcription mRNA plays a role in both the transcription of DNA into a series of nucleotides and the translation of that series of nucleotides into a series of amino acids.
The control of gene expression also involves mRNA. It may be applied to control both the time and volume of protein synthesis within a cell. By regulating the quantity of mRNA a gene produces, it may also be used to alter how active a gene is. This may be used to regulate the expression of particular proteins in a cell, which can have a significant impact on the cell's functionality.
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normal mitosis results in the formation of two nuclide that are genetically
Mitosis creates two nuclei that are genetically identical.
A plant is growing near edge of a forest grows best when it gets a large amount of sunlight. If a forest fire occurs and burns down many trees in a forest, how will this affect the plant’s population?
Answer:
the plant's population will increase as now it has an abundance of sunlight because all the trees blocking it got cut down.
Explanation:
If an egg that contains 24 chromosomes instead of 23 chromosomes is fertilized by a normal sperm, the result is
Answer:
However, in this question, the egg cell has 24 chromosomes instead of 23. This extra chromosome is often due to an error in meiosis, the type of cell division that makes gametes. So, after fertilization of an ovum with 24 chromosomes with a sperm cell with 23 chromosomes, a zygote with 47 chromosomes is the result
Failure to bend the knees and lower the body until the surface of the legs at the hip joint is lower than the top of the knees describes what
Failure to bend the knees and lower the body until the surface of the legs at the hip joint is lower than the top of the knees describes squat past parallel. Thus, the correct option is A.
What is parallel for a squat?The exerciser lowers their hips till the tops of their thighs are parallel to the floor while keeping their lower back flat and their chest up in a proper parallel squat.
In fact, if your weight is distributed correctly and you maintain good posture during the movement, a full squat (below parallel) may actually produce more knee stability.
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List all the categories humans belong to starting with life and ending with species name.
List all the categories humans belong to starting with life and ending with species name.
1. life
2. eukarya
3. animalia
4. chordata
5. mammals
6. primates
7. hominid
8. homo
9. sapiens
Just in case anyone needed it!!
The categories can be ordered as life, Eukarya, Animalia, Chordata, Mammalia, Primates, Hominid, Homo, sapiens.
What is classification?Classification is the ordering of organisms based on the similarities in their characteristics.
In case of humans the categories includes:
Kingdom – Animalia.Phylum- Chordata.Class- Mammalia.Order – Primates.Family – Hominidae.Genus – Homo.Species – sapiensThus, this is the categories humans belong to starting with life and ending with species name.
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Arthropods are joint-legged animals. Spiders, crabs, pill bugs, centipedes, and millipedes are examples of the many types of arthropods. Which of these arthropods are most closely related?
Arthropods are joint-legged animals. Spiders, crabs, pill bugs, centipedes, and millipedes are examples of the many types of arthropods these are the centipedes, and millipedes.
What are the Arthropods ?
The arthropods which can be greater carefully associated are d. Arthropods of the equal species.
These arthropods are broadly disbursed in the course of the world, and they're characterised via way of means of a long, flat, multisegmented frame with one (centipede) or two (millipede) legs rising from every frame segment. Although maximum centipedes and millipedes are much less than 1.five in.
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Describe what happens when blood glucose levels are not kept stable.
Blood glucose levels should be kept stable in the body because :-
A rise in glucose level can cause diabetes mellitus or simply diabetes due to too much glucose in the blood stream.In this patients pass urine too much loaded with sugar. Also he feels thirsty due to too much loss of water and becomes weaker and weaker.A fall in glucose level can cause hypoglycemia.
Even a little fall of glucose level in the bloodstream can bring a patient in a state of coma. The person gets frequent headaches, vomiting, dizziness, etc.The regualtion of glucose in the body is done by two main hormones secreted by an endocrine gland called pancreas.
These two hormones are - Insulin and Glucagon.Insulin lowers the glucose level in the body whereas, Glucagon helps in increasing it.Therefore, the glucose level should be always kept stable in the body.
Explanation:
Hope it helps you!!Hundreds of years ago, which of the following did doctors believe was a major cause of disease?
Answer: Bacteria.
Explanation: That was why penicillin was manufactured, because doctors believed bacteria was a major cause of diseases.
Hope this helpsA racoon may live longer when it only eats vegetables.
What is the student doing?
A. Forming a hypothesis
B. Collecting data
C. Drawing a conclusion
D. Making a prediction
Answer:
D making a prediction
Explanation:
Which tissue type
contain neurons
and glial cells and
transports nerve
impulses across
the body?
A. Epithelial tissue
B. Nervous tissue
C. Connective tissue
D. Muscular tissue
Answer:
(B) Nervous tissue
Explanation:
Nervous tissue consists of two cells: nerve cells or neurons and glial cells, which helps transmit nerve impulses and also provides nutrients to neurons.
Answer:B
Explanation:Nervous tissue is found in the brain, spinal cord, and nerves.
Nervous tissue contains two major cell types, neurons and glial. Neurons are the cells responsible for communication through electrical signals. Glial cells are supporting cells, maintaining the environment around the neurons.
Is a law a theory or is a theory a proposed law
Answer:
Theory is a proposed law.
Explanation:
A proposed law is a law that has not yet been approved; a speculation made by an individual that has not yet been proven as a real thing. For example, I say that ice cream is now free for all, and that would be a completely proposed law since no one has approved that but me.
Answer:
Neither
Explanation:
A law is something in science that can be proved through experimenting. A law does not attempt to explain why something is the way it is, it only states it.A theory is an idea that has a large amount of scientific data backing it and is the accepted answer by most scientists, but there is no way to experiment on a scientific theory. A theory will never be able to become a law. A theory explains what it is describing.An example of a law is the law of conservation of energy, which has to do with how energy is used. Scientific experiments can be done to observe energy.
An example of a scientific theory is the theory of natural selection. Based off of data and observation, the theory of natural selection has been formulated, and the theory of natural selection explains why.