Answer:
D: 4.6 x [tex]10^{9}[/tex]
Explanation:
4.6 x 10^{9} = 4,600,000,000
Earth is approximately, 4.6 billion = 4,600,000,000 = 4.6 x 10^{9}
The estimated age of Earth is 4.6x10⁹ years (D).
Scientists estimate the age of Earth through various methods, including radiometric dating of rocks and minerals. By analyzing the isotopes present in rocks and minerals, scientists can determine the decay rates of radioactive isotopes and calculate the time since the formation of those rocks.
Based on extensive studies and evidence, the current estimated age of Earth is approximately 4.6 billion years (4.6x10^9 years). This estimation is supported by multiple lines of evidence, including radiometric dating of rocks from different geological formations, lunar samples brought back from the Moon, and meteorites.
The age of 4.6 billion years is consistent with the age of the oldest rocks found on Earth's surface and the ages of the Moon and meteorites, which are believed to have formed around the same time as Earth. These dating methods provide a reliable framework for understanding Earth's geological history and the processes that have shaped our planet over billions of years.
It's important to note that scientific estimates and understanding of Earth's age continue to evolve as new evidence and research emerge. However, the current consensus among scientists is that the age of Earth is approximately 4.6 billion years, as indicated by extensive geological and radiometric dating studies.
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A 80 kg patient needs a medication x in the amount of 0.25 mg/kg/day.The medication comes in a liquid solution of 50 mg for every 10ml.How many ml of this solution will this patient need in a day
Answer:
i will give you ur points back but i need these points to do a question but i will give 20 back
developing countries tend to have high birth rates. why?
Answer:
In developing countries children are needed as a labour force and to provide care for their parents in old age. In these countries, fertility rates are higher due to the lack of access to contraceptives and generally lower levels of female education
Explanation:
When the term biceps, triceps, or quadriceps forms part of a muscle's name, what does it tell you about the muscle?
Answer:
The muscle has two, three, or four origins, respectively. The names of muscles often indicate the action of the muscle.
Biceps, triceps, or quadriceps forms the part of a muscle's name describes about the origin of the muscle. Biceps indicate two origins, triceps indicate three origins, and quadriceps indicate four origins.
What are Muscles?Muscles are the soft tissues of the body. Many stretchy fibers makes up a muscle. A person has more than 600 muscles in their body which are responsible for many functions.
Different types of muscles in the muscular system have different functions. Some of the muscles help in running, jumping or performing delicate tasks such as threading a needle, stitching, etc.
The terms biceps, triceps, or quadriceps forms a part of the name of the muscle where one can assume that the muscle has two, three, or four origins.
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In which situation might a gene pool contain an allele that causes a lethal
disease?
A. If the allele is in the mitochondria
B. If the allele is expressed after reproduction has occurred
C. If the allele is on the Y chromosome
D. If the allele is expressed in its dominant form
correct answer is B; if the allele is expressed after reproduction has occurred.
The situation in which a gene pool contain an allele that causes a lethal disease is: (B) If the allele is expressed after reproduction has occurred.
When the allele is expressed after reproduction has occurred, individuals carrying the lethal allele can reproduce and pass on the allele before the disease is expressed. Since the disease may not manifest until later in life or after reproduction has occurred, the allele can persist in the gene pool without being selected against. Over generations, the allele frequency can remain relatively stable, leading to the presence of the lethal allele in the gene pool.
An allele can be defined as a variant form of gene. Alleles can exist in different forms due to changes in the DNA sequence. These changes can be substitutions, deletions, insertions, or other types of genetic mutations.
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What is formed by organized groups of cells with similar structures and a common purpose?
A
organ
00
digestion
С
circulation
D
tissue
Answer:
Cells with similar structures and a common purpose that are organized form a tissue (option D).
Explanation:
Biological tissues are structures originated by the grouping of differentiated cells, which are organized and distributed in such a way that they can fulfill a function in a coordinated way. A characteristic of tissues is that all the cells that constitute them have the same embryonic origin.
An example of a tissue is nervous tissue, formed by neurons, specialized cells that when united form it and fulfill the same function.
The functions of cells are mainly multiplication, development and differentiation, in addition to their ability to group together to form tissues.
The other options are not correct because:
A. Organs are formed from differentiated tissue.
B and C. Digestion and circulation are functions that depend on the organs of the digestive and circulatory systems, respectively.
When a crossover occurs within the inversion loop of a pericentric inversion, each recombinant chromatid will have:___________
20 POINTS
1. A long chain of monomers that contains ribose *
a DNA
b RNA
c neither
2. a long chain of amino acids that contains uracil
a DNA
b RNA
c neither
please answer both!!
How many valence electrons does Neon have and does it have cations and anions???
Answer:
Neon has eight valence electrons and it does not have cations or anions.
Explanation:
Neon is a noble gas, meaning it has already fulfilled the octet rule and has eight electrons in its valence electron shell. Hence, it does not want to lose or gain any more electrons, and does not have cations or anions.
Hope this helped!
Answer:
Neon has eight valence electrons and it does not have cations or anions.
Explanation:
Place the next two tRNA molecules on the mRNA strand. What happens?
Answer:
Required Answer:-The tRNA left the ribosome. The amino acids stayed and the mRNA partially left the ribosome.If place the next two tRNA molecules on the mRNA strand, the amino acids shifted to the next tRNA molecule.
How are tRNA molecules involved during protein synthesis?
tRNA departed from the ribosome, while the mRNA partially exited the ribosome, the amino acids remained. While a tRNA molecule separates from the mRNA and leaves the ribosome, the neighboring amino acids join with one another.
The ribosome adds the amino acid carried by each tRNA molecule to the lengthening amino acid chain as it attaches to the mRNA.
The polypeptide chain is once more transferred to the new tRNA, the empty tRNA is released, and the ribosome ratchets through the mRNA by three further nucleotides while also shifting the tRNA.
Therefore, the ribosome and the mRNA are drawn to a tRNA whose anticodon is complementary to the next codon in the mRNA.
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A/an ________ is longer than it is deep while a/an ________ is deeper than it is long. Group of answer choices Incision, puncture Puncture, incision Cleft, incision Puncture, cleft
The correct answer is A / an incision is longer than it is deep while a / an puncture is deeper than it is long.
Explanation
The word incision is a term generally referred to as a medical procedure in which a superficial cut is made on a surface of the skin, of different lengths with the help of a very sharp blade. On the other hand, a puncture is a surgical procedure in which an organ is punctured deeply until it reaches an organ using a pointed instrument to extract liquids that it contains. According to the above, the answers that the paragraph completes are A. Incision and puncture.
An incision is longer than it is deep while a puncture is deeper than it is long.
An open wound is an injury caused by an external or internal break in body tissue as a result of falls, accidents with sharp objects, and car accidents.
A puncture is a small hole caused by a long, pointy object, such as a nail or needle. It is deep and may lead to damage of internal organs.
A incised wound is produced by a sharp edge object that is usually longer than it is deep.
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How can we measure our energy use?
Answer:
it is measure in kilo bytes, gigabytes
If bugs did disperse what are the costs and benefits of accepting a host plant of either species?
Answer:
How could a dispersing bug know what species of plants it would be settling on? A bug can know what bug it is landing on by sight, smell and taste. All insects disperse, even those without wings, so the question contains a false assumption and is therefore unanswerable. In general, the contribution of any particular trait to an organism's fitness depends on the details of the life cycle. Without knowing those details, it's impossible to say.
But for benefits, there are a lot of benefits of accepting a host plant. Some of the benefits are:
It is an avenue or a strategy for egg laying females when larvae must feed on plant so as to complete development bugs or insects are attracted to flowers due to its scent or brightly coloured petals. These flowers produce a sweet liquid, called nectar, which the bugs or insects feed on.Learn more from
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volcanic eruptions can affect climate by
Answer:
The gases and dust particles thrown into the atmosphere during volcanic eruptions have influences on climate. Most of the particles spewed from volcanoes cool the planet by shading incoming solar radiation. The cooling effect can last for months to years depending on the characteristics of the eruption.
Hope this helped, have a good day
Answer:
Volcanoes can impact climate change. During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere. Injected ash falls rapidly from the stratosphere -- most of it is removed within several days to weeks -- and has little impact on climate change
Explanation:
a 50 kg box is pusher across the floor.if the acceleration of the box is 2.5m/s², what is the net force ecerted on the box
Answer:
Required Answer:-Mass=m=50kg
Acceleration =a=2.5m/s^2
According to Newton 's second law of motion[tex]{:}\longrightarrow[/tex][tex]\sf F=ma [/tex]
Substitute the values[tex]{:}\longrightarrow[/tex][tex]\sf F=50×2.5 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf F=125N [/tex]
Answer:
125 Newton
Explanation:
Given,
mass(m)=50kg
acceleration(a)=2.5m/s²
we have,
F=ma
=50×2.5
=125 Newton
PLEASE HELP me solve this!!!
Water is able to pass through the tubing.
Which best describes a recessive allele?
A. always inherited from a parent when a dominant allele is inherited from the other parent
B. never inherited from a parent when a dominant allele is inherited from the other parent
C. only determines phenotype when a dominant allele for the same trait is present
D. does not determine phenotype when a dominant allele for the same trait is present
Answer:
A.always inherited from a parent when a dominant allele is inherited from the other parent
Answer:
A
Explanation:
yeet
A vacuoles function is somewhat similar to the function of what human organ?
Answer:
The vacuole is found in both plant and animal cells. The equivalent in the human body is the stomach.
A vacuoles function is somewhat similar to the function of human Kidney.
What are vacuoles?
A vacuole is a cell organelle found in animal, plant, bacteria, protist, and fungi cells. It’s one of the largest organelles found in cells, resembles a large sac surrounded by a thin membrane called tonoplast filled with fluid.
The main function vacuoles serves as the storage unit of the cell by holding various substances and molecules.
The contractile vacuoles of protozoans and freshwater sponges are especially evolved to serve the function of expelling out excess of water and salt. It is thus, work similar to human kidneys as an organ of osmoregulation and excretion.
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Which of these is NOT part of the digestive system?
pancreas medulla
teeth
small intestine
Where does the H+ come from that makes ATP synthase work?
Electron Transport Chain
Krebs cycle
Glycolysis
lii
06.06 Balancing the Forces
Science Grade 5 v17 (GS)- Steinmetz / Module 06: Force and Motion
6. (06.06 MC)
Observe the bike rider in motion. Identify the image that shows how the forces need to change so that he is no longer
In motion
Answer:
c
Explanation:
i think
Answer: its D
Explanation:
How are watersheds and aquifers connected to the water cycle?
Answer:
Ground water flow
Explanation:
Watershed and Aquifers are connected to the water cycle by groundwater that flows under ground, so water is always under the ground.
When it is winter in North America it is summer in South America. Explain why this happen.
Answer:
north america is on the northern hemisphere, so we get more direct sunlight when the southern hemisphere (south america) gets less direct sunlight and visa versa.
Explanation:
North america is on the northern hemisphere, so we get more direct sunlight when the southern hemisphere (south america) gets less direct sunlight and visa versa.
What are the hemispheres of earth?Any circle drawn around the Earth divides it into two equal halves called hemispheres. There are generally considered to be four hemispheres: Northern, Southern, Eastern, and Western.
Hemisphere comes from the Greek, and combines the prefix hemi-, for "half," with sphere, or "perfectly round ball." We talk about the earth as divided at the equator into the northern and southern hemispheres.
It is important because it brings about differences in the climates of the Northern and Southern hemisphere because of the Earth's seasonal tilt towards and away from the sun.
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I need some assistance please
Which non renewable resource do you think should be decreased? How can it be done?
Which Renewable resource could be increased? How do you think it should be done?
Giving 40 points (please only answer the questions)
Answer: Wait so you dont need these anymore?
Explanation:
Do trees need energy in order to grow? If so, where does that energy come from?
Answer:
the energy comes from sunlight
Explanation:
it's too simple...
HELP WILL GIVE BRANLIEST AND EXTRA POINTS! (Question 4)
Answer:
a
Explanation:
it has a soft outside
Why is environmental science important environmental science addresses (1)____ strategies so we utilize our natural resources efficiently. It also provides us with knowledge on how to lead an (2)_____ lifestyle
1. Recycling, business, social
2.luxurious, healthy, eco-friendly
Environmental science deals with biology along with geography and the environment. It addresses a recycling strategy and aids in leading an eco-friendly lifestyle.
What is a recycling strategy?A recycling strategy is a technique that includes the waste material into reusable material so that the pollution is reduced and the product is used efficiently.
The sciences aid in leading an eco-friendly life as they reduce the negative impact on the environment and make the world a better place.
Therefore, recycling and eco-friendly are the correct blanks.
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How is the purple stem trait variation similar to the tongue-rolling trait variation?
Explanation:
Species
A group of organisms that can reproduce and produce fertile offspring (children that can reproduce themselves)
Trait
Characteristic of an organism (body part, behavior, chemical, produced)
Variation
Differences in trait expression
Inherited trait
Trait passed from parent to children (offspring)
Acquired Trait
Traits learned by/changed in an individual from interaction with the environment
Protein
A special type of biological molecule (only found in organisms) that organisms use to build, maintain, and operate the cells/tissues/organs of their bodies. (Like a prepared meal)
DNA
The biological molecule that serves as the chemical instructions or blueprints for building all the proteins an organism needs to build its body and survive. (Like words in a cookbook)
Gene
A section of a DNA molecule that serves as the instructions to build one protein. (Like one recipe in a cookbook)
Chromosomes
Large packages of coiled DNA molecules that are passed from parents to children. (Like different chapters on a cookbook)
Pollen
Flowering plant sperm (male sex cell)
Given this sequence of nucleotide bases on a strand of DNA: TCAGAT, state the sequence on it's complementary strand of DNA.
ununhahhdhcbahhbhjcn hsj bchbhcachhas hca hvahvh
Which statement is true of recessive sex-linked traits such as color
blindness?
A: males inherit them only from their mothers
B: only males inherit them
C: females inherit them only from their fathers
D: females never inherit them
Answer:
B. only males inherit them
Explanation:
males are never a carried for x-linked trait.