Since 3% of the original radioactive carbon-14 is still radioactive, the carbon-14 radioisotope has undergone five half-lives.
What is Half-Life?Half-life of a substance is the time it takes for half the original amount of the substance to decay.
Radioactive elements decay spontaneously according to their half-lives.
Since 3% of the original radioactive carbon-14 is still radioactive, the number of half-lives undergone is determined as follows:
After one Half-Life, 50% remains
After two half-lives, 25% remains
After three half-lives, 12.5% remains
After four half-lives, 6. 25% remains
After five half-lives, 3.125 % remains.
Therefore, the carbon-14 radioisotope has undergone five half-lives.
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Answer: 5 Half Life Cycles
Explanation: edg 2023
an ecology graduate student gave an oral report. What important lesson has been learned about wildlife and forest management since the turn of the century, based on this information -
The important lesson learned is that the study of ecology can be fundamental in a management program.
What is ecology management?The expression 'ecology management' makes reference to the strategies aimed at enhancing the ecological features of a geographic area.
Ecology management is a fundamental issue to achieve sustainable ecology development.
In conclusion, the important lesson learned is that the study of ecology can be fundamental in a management program.
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What is overconsumption? How does overconsumption mirror overpopulation?
what is the name of one of the lower chambers of the heart that receives blood from the upper chambers and pumps it into the arteries?
Answer:
Right Ventricles
Explanation:
Right ventricle receives blood from right atrium and pumps it into pulmonary artery.
Fleas living on a dog are examples of what symbiotic relationship? .A .mutualism .B competition .C parasitism .D predator-prey
The biological information stored in organisms is in the sequence of nucleotide bases (i.s., A, T C and G) in DNA molecule. true false
Answer:
True
Explanation:
DNA: ATCG
RNA: UTCG
Contains the code that guarantees the accurate ordering of the 20 amino acids in all
proteins made by living cells.
A. Nucleotides B. Gametes C. Meiosis D. Mitosis
Circle what kind of light each object emits.
(a) fire
incandescence / luminescence
Answer:
luminescence is the correct option of given statement
2) For each of the following write whether it is homozygous dominantheterozygous or homozygous recessive AA TT
Organisms such as jellyfish and sea turtles depend on which ocean movements to find food and avoid predators? *
a. tides
b. waves
c. gravity
d. currents
Answer: D. Currents
Explanation:
A current is the movement of streams under the water. It carries organisms and other matter through the ocean. Jellyfish, although they can swim, mostly rely on currents to float through the water.
During what stage of development do cells
differentiate?
A. at fertilization
B. once birthed
C. as a zygote
Answer:
at fertilization
Explanation:
Which birds of prey are the most common and are considered fierce hunters.
The most common birds of prey that are considered fierce hunters include eagles, hawks, and falcons.
Predating BirdsPredating birds or birds of prey are species of birds whose survival-hood depends on them hunting down other animals for food.
Birds of prey are usually equipped and well adapted to hunting their prey. These adaptations include well-developed claws and beaks, a special swooping ability, very sharp eyesight, and so on.
Examples of birds of prey include eagles, hawks, and falcons.
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According to the principle of original horizontality, what most likely happened to the rock layers in the background?
Answer:
They were deposited horizontally and then shifted by a geologic event.
Explanation:
How do molecules that are too large to pass through the spaces of the cell membrane move into the cell?
A. The molecule will break up into smaller pieces.
B. The molecule will shrink so that it can fit in the spaces.
C. The molecule will move through a matching protein channel.
Please only answer if your 100% sure, this is for a test.
Explanation:
cell by a process called endocytosis, where a small piece of the cell membrane wraps around the particle and is brought into the cell. If the particle is solid, endocytosis is also called phagocytosis. If fluid droplets are taken in, the processes is called pinocytosis.
Answer: C
Explanation:
Gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. Which statement best describes Gabriel’s measurements?
They will remain constant.
They will both be recorded in joules.
They will both be recorded in hertz.
They will involve compressions.
Answer:Its A
Explanation:Edge
Gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. The statement they will both be recorded in joules is best describes Gabriel’s measurements. Correct Option is 2.
Energy and work are both physical quantities measured in joules (J) in the International System of Units (SI). In this experiment, Gabriel is measuring the energy and work associated with the ball rolling down a hill, and both measurements will be expressed in joules. Energy represents the capacity to do work, and work is the transfer of energy that occurs when a force is applied to move an object over a distance. Both energy and work are directly related and are measured in the same unit, joules, which is a measure of energy or work.
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In an area of 3 square miles there are 27 bears. What is their population density?
A. 9 bears / square mile C. 24 bears / square mile
B. 81 bears / square mile D. 30 bears / square mile
Answer:
9 bears per square mile
Have a nice day :)
what's the answer please
1. Taking in useful substances
2. Oxygen
3. Carbon dioxide
4. Oxygen and Carbon dioxide
5. C since there are more than a living organism
Mackenzie notices that her best friend can apply paint in a perfectly straight line on a ceramic pot. Mackenzie knows
that paint is hard to control at times, but she tries it anyway and ends up stroking a straight line on first try, just like her
best friend. Did Mackenzie successfully model her best friend's painting skills?
No, because she didn't ask her friend for help.
Yes, because she observed her friend and knew she could do better.
Yes, because she was able to draw a straight paint line just as her friend did.
No, because she didn't have to try more than once.
please answer my question correctly
#1
Sea breeze part
When the land gets warmer in day time the warm air goes up To fill the free space created underneath the middle atmosphere cold air breezes from ocean surface towards land to fill up the free space .This is the reason why humidity remains at peak during day time on beach sides#2
Land breeze part
In night time the opposite of day time appears ,the ocean surface gets warmer.The warm air rises upTo fill up the free space cool air from land surface goes there .Humidity remains less so we feel chill during night timeAnswer:
#1
Sea breeze part
When the land gets warmer in day time the warm air goes up
To fill the free space created underneath the middle atmosphere cold air breezes from ocean surface towards land to fill up the free space .
This is the reason why humidity remains at peak during day time on beach sides
#2
Land breeze part
In night time the opposite of day time appears ,the ocean surface gets warmer.
The warm air rises up
To fill up the free space cool air from land surface goes there .
Humidity remains less so we feel chill during night time
After a forest fire, which type of organisms will begin secondary succession?
I’ll mark brainliest
Part One: Graphic Organizer
For this assignment, you will take a close look at your research, and then summarize ideas about the question: Should we build roads in the rainforests?
1. Use the table to record the effect of building roads in the rainforest. Consider the effects on each group or part of Earth affected.
2. For each group or part that is affected, decide whether the effect of building the roads is positive or negative. Record that information in the chart.
DONT ANWSER IF U DONT KNOW
I AM NOT LOOKING FOR A PARAGRAPH
Road building has both positive and negative effect on the rainforests.
What was impact of road building on rainforest?Road building has a range of direct impacts on rainforest ecology.
Negative effect of road construction is that In wet tropical environments, the cut-and-fill operations associated with road construction can impede streams, increase forest flooding, and drastically increase soil erosion.
Positive effect on road construction that we get clear route map of the rainforest and we can easily move within rainforest.
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Explain how Direct Harvesting has contributed towards the loss of
biodiversity.
Substances change states when they move between solid, liquid, and gas forms. when a substance changes from one state of matter to another, its mass
this is science by the way
The water in vegetables evaporates over time causing the vegetables to wilt. Why do grocery stores spray water on their vegetables?.
Answer: For aesthetic reasons and to charge extra.
Explanation: Shoppers are more drawn to vegetables with water because they look more hydrated and “fresher”. Vegetables absorb moisture, so they will weigh more, therefore shops can charge more.
What information can a scientist learn directly from a single fossil?
OA. How the organism is related to organisms on Earth today
B. How many offspring the organism
produced
C. What the organism looked like
D. How long the organism lived
SU
SAAMINE
KORT THING SPIRING HARU
P
FOUN
D
leve
PROTEILE SE
mais rond
SARDE
sang big
According to the research, a scientist can learn directly from a single fossil how long the organism lived and what it looked like.
What is a fossil?They are the remains of an organism and the organic substances that present a certain degree of petrification and are naturally located in the various terrestrial layers.
These organic remains found in the strata of sedimentary rocks serve to date their ages, providing information on specific periods in the history of the planet.
Therefore, we can conclude that according to the research, a scientist can learn directly from a single fossil how long the organism lived and what it looked like.
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Humans currently rely on fossil fuels for the majority of their energy needs. A. Why can't humans always use fossil fuels for energy? (5 points) B. What two steps would you take to conserve fossil fuels? (4 points) C. What two impacts do fossil fuels have on the environment? (6 points)
Answer:
I am going to answer the questions in one brief summary of fossil fuels.
Fossil fuels are non-renewable, meaning one day they will run out.
Fossil fuels are reliable, meaning rain or shine we can use them.
Fossil fuels emit greenhouse gases, causing our world to warm up.
Magnifying Living Things
In this activity, you will look at six samples from living things under a magnifying glass.
Estimated time to complete: 20 minutes
You will need these materials:
magnifying glass (At least 10× magnification)
a leaf
a twig or tree bark
the skin on your hand
a flower
a strand of your own hair (or a sample of pet hair, if you have a dog or cat)
a sample of your choosing
Data Collection
In this activity, you will magnify samples from the five living things listed below. You must also include one sample of your own choice. Your sample could be from a plant, animal, human, or anything that is living.
a leaf
twig or tree bark
the skin on your hand
a flower
a strand of hair
a sample of your choosing (Grass)
Part C
Part C
Did you observe any other characteristics of life in your samples?
Part D
For each of your samples, research how the structures you observed under magnification help the organisms carry out basic functions of life. Write your findings in the space provided.
Answer:
"bark" (and any subsequent words) was ignored because we limit queries to 32 words
Explanation:
-_-
If a researcher tried shotgun sequencing with a single chromosome from a single cell, would the process work?.
Answer: No, there would be no overlap because there is only one piece of double-stranded DNA that is fragmented.
Explanation:
When it is winter in North America, it is summer in South America. Explain why this happens. Read the assignment carefully and make sure you answer each part of the question or questions. After you've written your response, go back and read it again to make sure your thoughts are clear.
Answer:
It is also important to remember that the seasons in South America are the reverse of that in the Northern Hemisphere, meaning that summer falls between December and February and winter between June and August.
The further north you are on the continent, the closer you are to the Equator (the country, of course, but also the Equator line). The temperature variations between the different months of the year are therefore smaller and smaller as you go up. In other words, each seasons of South America depends on its country.
Identify three ecosystem services of biodiversity.
Explanation:
Biodiversity provides us with drinking water, oxygen to breathe, food, medicine, decomposition of waste, and helps our planet withstand natural disasters.
Regulating Services.
Cultural Services
Supporting Services
What would happen to a compass if earth's magnetic field were to invert?
a.
the compass would point in the opposite direction.
b.
the compass would oscillate between magnetic north and magnetic south.
c.
the compass would not be affected.
d.
the answer depends on the strength of the magnetic field.
