Answer:
B
Explanation:
The correct option should be B.
The Astronomical Unit, AU, is a measurement unit for length in general astronomy and represents the mean or the average distance of the sun from the earth.
Mathematically, in astronomy,
1 astronomical unit = 150,000,000 km
But then, 1 km = 0.621371 mile
Hence,
150,000,000 km = 150,000,000 x 0.621371 miles
≈93,000,000 miles
Therefore, 1 astronomical unit can also said to be approximately equal to 93,000,000 miles.
The correct option is B
a strand of dna contains 10% adenine. what percentage of cytosine must be present in this strand of dna then?
a) 80%
b) 40%
c) 10%
d) 20%
Answer:
[tex]\boxed {\boxed {\sf B. \ 40 \% \ cytosine}}[/tex]
Explanation:
First, recall the base pairs in DNA:
Adenine and Thymine Cytosine and GuanineWe know this strand of DNA has 10% adenine. Since A and T pair, there must also be 10% guanine.
So, A and T make up 20% of the DNA strand.
That leaves 80% for cytosine and guanine. They are pairs, so they share this percentage equally.
80/2 =40There must be 40% cytosine and 40% guanine.
The strand of DNA has 40% cytosine
[tex]2 \frac{1}{3} + 3 \frac{5}{7} [/tex]
Bacteria are able to reproduce very quickly through a process known as binary fission. Binary fission requires only one parent. Based on this information which inference is most accurate?
Answer:
this is called asexual reproduction
Explanation:
it is where one parent makes a clone of themselves through budding.
Please hurry i need help.
What process ensures that the normal number of chromosomes is restored after each cell division? During what part of the cell cycle does this occur?
Answer:reproduction
Explanation: when the sperm and egg unite to form a single cell, the number of chromosomes is restored in the offspring. Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.
Which best details the movement of energy
through aerobic cellular respiration?
Answer:
Heat energy is absorbed as chemical potential energy is transferred from oxygen molecules to ATP molecules. Heat energy is released as chemical potential energy is transferred from oxygen molecules to ATP molecules.
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how are sexual traits adaptations
Answer:
stronger and longer organ are able to mate more with females, whereas the shorter one didn't stand a chance.
Which structures are part of the appendicular skeleton?
Choose 1 answer:
A
The upper arm (humerus)
в)
The spine (vertebral column)
The ribcage (thoracic cage)
D
The skull (cranium)
Answer:
The upper arm (humerus)
Explanation:
*
What is the male part of the flower called
Answer:
anther
Explanation:
Stamen: The pollen producing part of a flower, usually with a slender filament supporting the anther. Anther: The part of the stamen where pollen is produced. Pistil: The ovule producing part of a flower. The ovary often supports a long style, topped by a stigma.
How is environmental health related to personal health?
Explanation:
preventing human injury and illness and promoting well-being to be well
what does federal law require of employers in regard to the hospital B vaccine
Answer:
Health care workers who work with blood or other bodily secretions which may carry the HBV virus must receive a free HBV vaccination.
How can humanity decrease the amount of carbon in the atmosphere
Answer:
Reducing our carbon footprint. For example, instead of using a car, that releases gas from fossil fuels, to go to work, ride a bike instead to reduce emissions from fossil fuels.
Explanation:
Someone please help I took the picture this is my last question on my homework
Answer:
According to the image that represents a cell in the human body, the true statement is that structure 4 is the cell membrane that provides exchange of O₂ & CO₂.
Explanation:
In cells, the cell membrane acts as a semi-permeable barrier to the passage of substances, including nutrients and oxygen (O₂).
One of the functions of the cell membrane is to allow the exchange of O₂ —necessary for the cell— and carbon dioxide (CO₂), a product of cell metabolism that must be removed.
In the image, the structure identified with the number 4 corresponds to a cell membrane of human cells that provides this gas exchange.
The other options are not correct because:
Structure 1 is a ribosome, not a chloroplast. Structure 2 is the nucleus, not a vacuole containing DNA. Structure 3 is a mitochondria, but protein synthesis does not occur there.Extreme pressure and temperatures can change sedimentary rock into _____.
Answer:
Metamorphic rock
Explanation:
When a sedimentary rock goes deep underground, it experiences heat and pressure. This distorts the rock and turns it into a metamorphic rock
A piece of wood that measures 3cm by 6cm by 4cm has a mass of 80g.
What is the density of the wood?
Answer:
1.1 would be the densiry
explanation
p=m/v is the density formula p being density and m being mass and v being volume
multiply 3 by 6 by 4 to get volume of 72
80÷72 = 1.1
The rate at which waste are produced by cell depends on what
A baseball player hits a baseball a distance of 75m in 5s. The baseball travels toward the east. Calculate the baseball's velocity.
Your Answer:
Answer:
15 m/s
Explanation:
75m/s/5 is 15ms
.
Explain how the respiratory system and circulatory system work together.
.
Explain how the circulatory system and the muscle system work together.
Answer:
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
what a nucleotide is
Answer:
they are organic molecules consisting of a nucleoside and a phosphate
Explanation:
Answer: A nucleotide is an organic molecule that is the building block of DNA and RNA. The nucleotide also have functions related to cell signaling, metabolism, and enzyme reactions
Explanation:
Which of these are components of a nucleotide? * 1 point Deoxyribose sugar Carboxyl group Nitrogenous base Phosphate group all of these are part of a nucleotide
Answer:
components of nucleotide is Sugar, phosphate, nitrogen
Explanation:
Please help as soon as possible!!!!!!!!!
Answer: it might be chemical 1, but I could be wrong
Explanation:
16. 1) Which of these is not needed by living organisms?
A. space
B. gravity
C. air
D. water
E. energy
Answer:
A. Space
Explanation:
You need gravity to stay on the planet and not drift off.
You need air to keep you alive.
You need water to keep you alive.
You need energy to do things like walk around, use your brain, etc.
Answer:
Space
Explanation:
Living organisms need air, water, energy. Gravity is technically also needed since all living organisms on earth are accustomed to it.
How do fungi reproduce asexually by budding????
Answer:
Answer is on the pic.
Explanation:
I hope it's helpful!
SpongeBob and his pal Patrick love to go jellyfishing at Jellyfish Fields! The fields are home to a special type of green jellyfish known as Goobers and only really great jellyfishermen are lucky enough to catch some on every trip. Many of the jellyfish are yellow (BB) or blue (bb), but some end up green as a result of incomplete dominance. What would happen if SpongeBob and Patrick crossed two "goobers” or green jellyfish? Complete the Punnett square to help you determine the probability for each color of jellyfish. What percentage would be "goobers" (green)? 0% 25% 50% 100%
The Punnett square to help you determine the probability for each color of jellyfish percentage would be "goobers" are 50%.
What is the goobers?Goobers is a slang term used to refer to someone who is naive or foolish. It can be used to describe a person who is easily taken advantage of or someone who is generally inept. Goobers are often seen as endearing and often have an innocent quality about them. They are also often seen as lacking in common sense and understanding of the world around them.
BB BB BB BB
bb bb bb bb
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The molecules shown in this image are able to cross the cell membrane
through facilitated diffusion. How will they be transported?
A. The molecules will move through channels in the membrane hy
proteins from inside the cell to outside the cell.
B. The molecules will move directly across the membrane from
inside the cell to outside the cell.
C. The molecules will move through channels in the membrane proteins from outside the cell to inside the cell.
D. The molecules will move directly across the membrane from the outside the cell to inside the cell.
Answer:
The molecules will move directly across the membrane from
inside the cell to outside the cell.
Explanation:
Ape-x
Facilitated diffusion is the type of transportation that moves the ions and the molecules. The molecules are transported directly through the membrane from inside to outside. Thus, option B is correct.
What is facilitated diffusion?Facilitated diffusion is the transportation of the molecules and ions across the cell membrane along the concentration gradient. It is a passive transport that involves the movement down the gradient.
The molecules are transported by the membrane proteins that facilitate their movement from inside of the cell towards the outer space of the cell. Unlike simple diffusion, facilitated diffusion uses energy in the form of ATP.
Therefore, the molecules present inside the cells will move directly towards the outside of the cell.
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DNA Replicates at which phase of the cell cycle? *
A. G1
B. S
C. G2
D. Mitotic (mitosis and cytokinesis)
Answer:
B. S
Explanation:
Correct
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I NEED HELP WITH THESE QUESTIoNS PLEASE HELP ME all answers i need thx
1. What is a nucleotide? How are nucleotides held together in DNA?
2. What is DNA replication? When and where does it occur?
3. Explain the steps of DNA replication, including the enzymes used?
4. What does the base pair rule state?
5. What is RNA?
6. What are three differences between DNA and RNA?
7. What are the three types of RNA?
8. What is transcription? Explain the process, including the ending product.
9. What is a codon? How do you read them?
10. What is translation? Explain the process, including the end product.
11. Explain the role of mRNA, rRNA and tRNA in translation.
12. What is a mutation?
13. How are mutations caused?
14. What are the difference types of mutations?
15. What are some effects of mutations?
16. What is cancer?
Answer:
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1. Nucleotides are joined together by covalent bonds between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar in the next nucleotide. This produces an alternating backbone of sugar - phosphate - sugar - phosphate all along the polynucleotide chain.
2. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.
3. Enzymes that participate in the eukaryotic DNA replication process include: DNA helicase - unwinds and separates double stranded DNA as it moves along the DNA. It forms the replication fork by breaking hydrogen bonds between nucleotide pairs in DNA. DNA primase - a type of RNA polymerase that generates RNA primers.
4. Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio (base pair rule) of purine and pyrimidine bases (i.e., A+G=T+C) and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
5. RNA plays a central role in turning genetic information into your body's proteins. This remarkable molecule also carries the genetic instructions for many viruses, and it may have helped life get its start.
6. the three main structural differences between RNA and DNA are as follows: RNA is single-stranded while DNA is double-stranded. RNA contains uracil while DNA contains thymine. RNA has the sugar ribose while DNA has the sugar deoxyribose.
7. Of the many types of RNA, the three most well-known and most commonly studied are messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA), which are present in all organisms.
8. Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template.
9. A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis. DNA and RNA molecules are written in a language of four nucleotides; meanwhile, the language of proteins includes 20 amino acids.
10. Translation is the process of translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis. The genetic code describes the relationship between the sequence of base pairs in a gene and the corresponding amino acid sequence that it encodes.
11. Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein.
12. A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
13. A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.
14. There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.
15. By changing a gene's instructions for making a protein, a mutation can cause the protein to malfunction or to be missing entirely. When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition.
16. Cancer refers to any one of a large number of diseases characterized by the development of abnormal cells that divide uncontrollably and have the ability to infiltrate and destroy normal body tissue. Cancer often has the ability to spread throughout your body. Cancer is the second-leading cause of death in the world.
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What could have caused the cave to form?
Answer:
Most caves are created when slowly-moving water dissolves, or eats away at limestone rock, creating spaces, caverns, and tunnel-like passages. ... The waters that made Wind Cave probably sat in the limestone for long periods of time. Water did not flow through the cave like a river.
sorry if I am wrong
The answer is Dissolved carbon dioxide
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1.what is the order if visible light in increasing energy?
-violet, indigo, blue, green, yellow, orange, red
-red, orange, yellow, green, blue, indigo, violet
2.visible light is a mixture of
-refraction and reflection
-atoms and molecules
-many colors
-ultra violet and non violet rays
1. -violet, indigo, blue, green, yellow, orange, red
2. -refraction and reflection
The floor of the Atlantic Ocean is split in two by an immense volcanic chain that spans more than 40,000 miles around the
globe. True or false ?
A. True
B. False
It’s science FYI
The statement is true because the floor of the Atlantic Ocean is split by an immense volcanic chain that spans more than 40,000 miles around the globe
What is the atlantic ocean?The atlantic ocean is a massive body of water that spans across approximately one-fifth of Earth's surface. It is the large body of water that separates Africa and Europe.
The floor of the Atlantic Ocean is split by an immense volcanic chain that spans more than 40,000 miles around the globe hence the assertion is true.
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