If the base-pairing in DNA becomes non-complementary such that purine bases can pair with one another and pyrimidine bases can pair with one another, the 1:1 ratio of purine to pyrimidine bases in DNA will no longer hold.
Due to the complementary base-pairing rule, the ratio of purine to pyrimidine bases in DNAs is usually 1:1. This is because Adenine always pairs with Thymine while Guanine always pairs with Cytosine.
Once this base-pairing rule is removed and becomes purine-purine and pyrimidine-pyrimidine pairings, then it becomes unnecessary for the ratio of purine to pyrimidine bases to be 1:1.
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why cellular respiration and photosynthesis are a
cycle?
Answer: Cellular respiration and photosynthesis are considered a cycle because the product (end material) of one reaction serves as the starting material for the other reaction. The starting material for cellular respiration is sugar and water and the products are carbon dioxide and water.
Explanation: hope it helped
Arrange the following agricultural practices in the order in which they are followed: 1. Harvesting 2. Sowing 3. Storage 4. Irrigation 5. Preparation of soil
Answer:
The order in which these agricultural practices are followed is: Preparation of soil, Sowing, Harvesting, irrigation
Many industrialized countries exist in an ecological deficit due to their lack of productive land, overproduction of waste, or low freshwater supplies. Which scenario describes a way to create an ecological surplus for an industrialized country?
Import beef and soy products into the country
Export garbage and wastes to other countries
Change farming techniques to conserve soil
Allow unlimited freshwater resources for all
Answer: change farming techniques to conserve soil
Explanation:
The scenario that describes a way to create an ecological surplus for an industrialized country is the change farming techniques to conserve soil. The correct option is C.
What are farming techniques?Farming technology, the system of practices used in crop production The goal of agricultural technique is to ensure high crop yield with minimal labor and capital investment per unit of realized product.
The circumstance that characterizes a manner for an industrialized country to generate an ecological excess is changing farming techniques to conserve soil.
Thus, C is the correct answer.
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Argentine ants are an invasive pest and are abundant throughout Los Angeles, and many parts of the world. How might Argentine Ants disrupt the food web of birds feeding on insects found on trees
Answer: Argentine ants disrupt (or kill) insects on trees. That may carry up to influence birds.
Explanation:
The process of converting food so that it can be absorbed into the blood and used by the blood vessels
A. Peristalsis
B. Bowel Elimination
C. Constipation
D. Digestion
Answer:
The answer would be digestion
Explanation:
When food is digested, it's broken down into smaller pieces so its can convert into energy for our body.
hope this helps :3
can someone heelp me plz
Mutations may be caused by A. errors in replication B. exposure to radiation C. breakage of chromosomes D. All answer choices are correct
Answer: D all answer choices are correct
explain how asexual reproduction is different from sexual reproduction
Explanation:
asexual only needs one parent and serial needs 2 parents
asexaul animals reproduce via mitosis and sexual animals via mieosis
what is one variable that friction depens on
A. how much light there is
B. the color of the objects
C. how hard the surface of the objects are being pressed together
I need help with dis too plz?
Answer:
DNA-RNA-MRNA
Explanation:
PLEASE HELP WHAT IS THIS BUG
Answer:
i dont know
Explanation:
The star in the diagram represents which of these? A. origin of replication B. replication fork C. replication bubble D. Okazaki fragment
Given what we know about the process of DNA replication, we can confirm that the star shown in the diagram represents the replication fork.
During the replication of DNA in the cellular process of multiplication, a structure known as the replication fork is formed. This fork is a structure that forms by helicases, which tear the hydrogen bonds that hold together two DNA strands in the form of a double helix.
The resulting structure contains two prongs, which are branches of the original DNA strand which are no longer doble or in the form of a helix. This area where the strands are separating into prongs is the replication fork which is being marked in the diagram by the star.
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IF a man with blood type A, one one of whose parents had blood type O, marries a woman with blood type AB, what are the putative genotypes of the offspring?
Answer:
The 1st child will surely have AA,The 2nd might have AB/OB and the last one will surely have OB
Explanation:
I studied at school like 2 yrs ago
I am sure
Answer:
If the man has blood type A one of whose parents had blood type O then he must be having the genotype IAi and the woman with blood group AB would have genotype IAIB. So if they produce offspring than the putative genotype of the offspring would be IAIA, IAi, IAIB, and IBi.
Explanation:
IA i
IA IAIA IAi
IB IAIB IBi
Therefore out of four offspring, two offspring would be having A blood group, one offspring would have AB blood group and one offspring would have B blood group.
HOPE THAT HELP YOU :)
ALL THE BEST
1) The biological levels of organization range from a single cell all the way up to the biosphere in a highly structured hierarchy. The biological hierarchy includes cells, tissues, organs, organ
systems, and organisms. Muscle is a type of tissue meaning it is made of groups of cells working together. However, the three types of muscle tissue are specialized for different functions.
What do all three types of muscle tissue have common? Select ALL that apply
A) Muscle cells all contract.
B) Muscle cells are all striated
Muscle cells all cause movement
D) Muscle cells are all cylindrical
E) Muscle cells all have one nuclei.
Answer:
A C D
Explanation:
Got it right
All three types of muscle tissue have three things in common: Muscle cells all contract; muscle cells all cause movement, muscle cells are all cylindrical; that is, they have the same similarities as options A, C, and D.
What are muscle cells?All three types of muscle tissue—skeletal muscle, smooth muscle, and cardiac muscle tissues have some common features, such as being composed of elongated cells and having the ability to contract and generate force that enables muscle tissue to cause movement, such as the movement of a limb, the beating of the heart, etc. Skeletal and cardiac muscle cells are striated, meaning they have alternating bands of dark and light regions, while smooth muscle cells are not.
As a result, muscle cells all contract; muscle cells all cause movement; and muscle cells all have cylindrical shapes, i.e., options A, C, and D.
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What is the empirical formula of a compound that contains 4.03 g of hydrogen per mole, 64.14 g of sulfur per mole, and 128.00 g of oxygen per mole?
Answer:
Oct 27, 2015 · CH_4 For this kind of problem, you can assume that the weight of the unknown sample is 100g ( since 75% C + 25% H = 100%). Thus, weight of C = 75g weight of H = 25g Since chemical formulas deal with number of moles rather than weight in grams, you need to convert each element by multiplying it to their respective atomic masses.
Explanation:
The empirical formular i H₂SO₄
The first step is to calculate the compound by the molar mass
Hydrogen, Sulphur, Oxygen
4.03/1 , 64.14/32 , 128/16
4.03 , 2 , 8
Divide by the lowest value
4.03/2 , 2/2 , 8/2
2, 1 , 4
H₂SO₄
Hence the empirical formula is H₂SO₄
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Use complete sentences to explain how global wind patterns such as the polar easterlies in the southern hemisphere would be impacted if Earth stops spinning.
Answer:
Atmospheric patterns are also tied to the planets rotation
It would greatly change the way air currents move
what is the right hotspot please help
Heat can be caused by
A. a decrease in friction
B. an increase in friction
C. friction remaining at zero
Answer:
B. an increase in friction
Explanation:
Answer:
B an increase of friction
Explanation:
Rub your hands together and you will probably feel it warm up a little, that's the friction.
WILL MARK BRAINLYIST!! (if mostly/ all correct)
1. According to the article "Drilling down into petroleum's impact on life on Earth", Peak oil is measured in RPRs (reserve-to-production ratios), which is recorded in years.
Question: Why does Iran have a higher RPR (80 years) than the United States (9 years)?
A. The United States consumes more oil than Iran.
B. Iran consumes more oil than the United States.
C. Iran produces more oil than the United States.
D. The United States produces more oil than Iran.
2. According to the article "Drilling down into petroleum's impact on life on Earth", carbon is a natural element that regulates Earth's temperature and makes the planet livable.
Question: Which event has led to major shifts in the carbon cycle becoming?
A. Peak oil has been reached this past decade.
B. Humans learned how to extract and burn fuel.
C. The API established units of measurement for oil.
D. Ancient algae and plankton were buried and crushed.
"(if you came for question 3 the answer is 1,2 and 3)"
-
4. According to the article "Ask an Amazon Expert: Why we can't afford to lose the rain forest", how is the Amazon rain forest connected to climate change?
A. Trees of the Amazon remove carbon dioxide from the air.
B. People of the Amazon produce most of the carbon dioxide that causes climate change.
C.Soil in the Amazon absorbs carbon dioxide.
D. Water in the Amazon River produces carbon dioxide, adding to climate change.
5. Which selection from the article "Scientists study Persian Gulf reefs for coral survival clues" identifies the biggest threat to coral reefs?
A. Warming waters spark bleaching events. Along with the bleaching, the ocean is becoming more acidic.
B. The researchers demonstrated that this new organism was the most commonly found algae throughout the gulf's coral reefs. They say it probably adapted as a result of the gulf's harsh conditions.
There are five questions which are related to the Drilling down into petroleum's impact on life on Earth.
1. C. Iran produces more oil than the United States.
RPR is referred to as the Reserve to Production Ratio which is measured in years. Higher RPR of Iran demonstrates that it has more extraction rate than United States.
2. B. Human learned how to extract and burn fuel.
The major shift in Carbon cycle is because fossils and fuels have been excessively used extracted and burned for fuel and energy.
4. A. Trees of the Amazon remove Carbon dioxide from the air.
Forests are essential because they help remove carbon dioxide from air. The existing forests of Amazon are absorbing carbon dioxide which results in moderate climate and reduced climate change.
5. A. Warming waters spark bleaching events. Along with the bleaching, the ocean is becoming more acidic.
The biggest threat to coral reefs is bleaching event. Warming the waters spark to bleaching events.
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I need help with dis the one dat says a diagram
Answer:
I believe the answer is B
Which one of the following organelles is a present only in plants?
—Golgi apparatus
—central vacuole
—mitochondria
what is the name of the part of an eukaryotic cell that contains digestive enzymes,which break down complex molecules into simpler ones or destroy or damage unwanted cells?
a. Lysosome
b. Golgi apparatus
c. Mitochondria
d. nucleus
Answer:
a. Lysosome
Explanation:
In the bacterial CRISPR system, the crRNA performs which of the following functions?
The CRISPR-Cas system is a genome engineering tool to edit the genome of any species. The crRNA is a sequence complementary to the target DNA of this genome editing system.
The CRISPR-Cas genome editing system is a recently developed genome engineering tool, which can be used to edit the genome of virtually any species.
This genome editing system consists of a nuclease (Cas) protein that cuts the DNA at the targeted regions, and a single guide RNA (sgRNA), which contains a crRNA (17-20 nt) sequence complementary to the target DNA.
In consequence, the sgRNA guides to the Cas protein in order to cleave the genome at targeted nucleotide sequences.
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The Forensic Anthropology Facility was founded by whom?
pls I need answers ASAP,thank you
I need help with dis plz the question dat says what is the slope of the line passes through the pair
Answer:
D) -1/2
Explanation:
(5-8)/(9-3)
-3/6 = -1/2
There are no ____________ in the ____________ , located where the nerve fibers of the ____________ leave the eye and enter the ____________ . Consequently, this region of the retina is commonly called the ____________
There are no PHOTORECEPTORS in the OPTIC DISC located where the nerve fibers of the RETINA leave the eye and enter the OPTIC NERVE. This region is commonly called the BLIND SPOT.
The retina is an important layer of nervous tissue that covers the inside of the eye, in which the sensation of vision initiates.
Photoreceptors are specialized cells within the retina that respond to light stimuli. In the retina, there are two types of photoreceptor cells: cones and rods.
The blind spot is a small portion of the visual field of the eye that localizes in the optic disk within the retina.
There are no rods or cones (i.e. photoreceptor cells) within the optic disk.
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What is the total amount of ozone remaining
Which of the following characters can NEVER be an adaptation?
Answer:
ahh......
where r the options??
Cells are the basic structural, functional and biological unit of all known living organisms. Identify
the type of cell shown below.
a. prokaryotic
b. eukaryotic
c. bacterial
d animal
Answer: In cell biology, an organelle is a specialized subunit, usually within a cell, that has a specific function. The name organelle comes from the idea that these structures are parts of cells, as organs are to the body, hence organelle, the suffix -elle being a diminutive
