Answer: By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
Explanation:
In snapdragons, flower color is determined by a gene with two alleles. Red flower color (R) shows incomplete dominance over the gene for white flower color (R'). A scientist is observing the genes and genotype of a snapdragon population. Which observation provides evidence that the population is evolving?
A) The alleles R and R' have unequal frequency in the population.
B) The population is decreasing, and the allele frequencies remain the same.
C) The allele R' is becoming more common in the population.
D) The population is increasing, and the allele frequencies remain the same.
Answer:
C) The allele R' is becoming more common in the population.
The observation from this experiment provides the evidence that the population is evolving and the allele R' is becoming more common in the population. Thus, the correct option is C.
What is Incomplete dominance?Incomplete dominance is the form of gene interaction which results from a cross in which each of the parental contribution is genetically unique and the allele gives rise to progeny whose phenotype is intermediate of the two parental genotypes and phenotypes. Incomplete dominance is also referred to as semi-dominance or partial dominance. It is an exception of the Mendel's law of dominance.
From the observation made in the experiment, it can be said that the allele R' which is responsible for white colored flowers in the plant are becoming more common in the population.
Therefore, the correct option is C.
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The diagram below shows the Moon's orbit around Earth. Letters A, B, C, and D represent four positions in the Moon's orbit.
What is the approximate length of time it takes the Moon to travel from position A to position C?
1 day
14 days
28 days
31 days
Answer:
14 days is the correct answer. Since it takes 27(approx) days to complete one revolution of the earth and will take (27/2=14) days to complete half of the revolution I.e. A to C.
The orbit of the Moon around Earth is shown in the diagram below. Four locations in the Moon's orbit are represented by the letters A, B, C, and D.
How long does it typically take the Moon to move from position A to position C?
The Moon takes 28 days to go from location A to position C, which is a rough estimate. The Moon is at perigee, or its closest point to Earth, at position A. The Moon is at its apogee, or furthest point from Earth, at location C. Even though the Moon's orbital speed varies, it does take about 28 days to go from perigee to apogee. The Earth's orbit around the Sun and the Moon's orbit are both inclined.
This indicates a tilt between the orbital planes of the Earth and the Moon. The Moon's location with relation to the Sun consequently shifts throughout time. The Moon appears to "wax" and "wane" in the night sky because of this. The 28-day synodic period of the Moon accounts for the Moon's shifting positions with respect to the Sun.
Therefore, it may be concluded that it takes the Moon 28 days to roughly travel from place A to position C. This is due to the Moon's relatively slow orbital motion, which takes around 28 days to complete from perigee to apogee and from one place in relation to the Sun to another.
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Cape Canaveral, Florida is where much of the worlds space exploration takes place. Geographically, this location was well suited to become America's spaceport. There are several reasons this is such a good location. It was not highly populated and is flat land facing the ocean. Railroads and ships were able to bring in the materials used to build the launch pad and space station. All of the following are contributions of the Space Center for Florida except which one? A) Education programs flourished. B) Thousands of new workers moved to the state. C) Factories manufacturing space products started all over the state. D) All the money that came into the state was used for space research.
Answer:
I think the answer is B
Explanation:
Which plant or plant part is a source of edible oils?
A.
wheat
B.
kidney beans
C.
sunflower
D.
rice
E.
cottonseed
Answer:
kidney beans is correct
Explanation:
How does increased sediment loads adversely affect coral reefs?
A- sediment reduces photosynthesis by zooxanthellae
B- nutrients stimulate zooxanthellae growth
C- sediment makes corals Brittle
D- sediment lowers oceanic pH
E- sediment kills parasites
Mutations are triggered by
Answer:
Mutations can also be caused by exposure to specific chemicals or radiation.
Explanation:
(mark as brainliest please)
Answer:
mutations can be triggered by errors during DNA replication, but also environmental contributions, such as uv light from the sun.
Directional selection only occurs in response to naturally occurring events.
Please select the best answer from the choices provided
Тrue
False
Answer:
False
Explanation:
Directional selection is a force in nature that causes a population to evolve towards one end of a trait spectrum. This change happens gradually and is hard to notice over a short period of time. This change is consistent and constant.
Which trend in hominid evolution can be supported by fossil evidence?
Walking upright
Use of tools
Increased intelligence
Decorating cave walls
pls help (ASASP)
This is the simplest invertebrate animal. Most are asymmetrical and reproduce either through asexual means or through internal, self-fertilization because most are hermaphrodites.
Answer:
whales I maybe wrong
Explanation:
Which of the earths sphere is by far the largest?
What characteristic makes a social group eusocial?
Answer:
Eusociality (from Greek εὖ eu "good" and social), the highest level of organization of sociality, is defined by the following characteristics: cooperative brood care (including care of offspring from other individuals), overlapping generations within a colony of adults, and a division of labor into reproductive and non.
Explanation:
Answer: Eusociality (from Greek εὖ eu "nice" good and social), the highest level of organization of sociality, is defined by the following characteristics: cooperative brood care (including care of offspring from other individuals), overlapping generations within a colony of adults, and a division of labor into reproductive and non.
2. Predict the oxygen level in a pond.
A The amount of oxygen dissolved in the water stays pretty even over a one year period.
B The water is too deep for plants to grow on the bottom, making it oxygen rich.
C Oxygen levels are high in the summer while the sun is shining and plants are
photosynthesizing, but they can drop in the winter.
D None of the above.
Answer:
C
Explanation:
oxygen levels are high in the summer while the sun is shining and plants are photosynthesizing but they can drop in the winter
ASAP WILL GIVE BRAINLIEST
The image below shows how wolves and dogs compare to some other animals in the levels of classification.
Based on the chart, how are fish and dogs related?
They belong to the same kingdom but different phyla.
They belong to the same phylum but different classes.
They belong to the same kingdom and class.
They belong to the same phylum and class.
Answer:
B.
Explanation:
Answer:
Was it b?
Explanation:
If you disagree with a point a discussion partner is making, it is usually a good idea to:
A. change the subject.
B. enlist others to join your effects
C. repeat your argument
D. ask verifying questions
Answer:
D. ask verifying questions
Explanation:
they would be a better solution instead of changing the subject or repeat the argument all over again.
What is complementary base pairing? Explain why complementary base pairing is necessary to maintain the double helix shape of the DNA molecule.
Answer:
A complimentary base pairing is how adenine can only bond with thymine and how guanine and cytosine through hydrogen bonding. It is necessary to maintain the double helix shape. Because it is opposite, that is why the DNA is that shape. It is anti parallel due to the Complementary base pairing.
Adenine can only bond with thymine and guanine with cytosine via hydrogen bonding. It's important to keep the double helix shape. Complementary base pairing causes antiparallelism.
Why complementary base pairing is necessary?Base pairs linked to a sugar-phosphate backbone form the double helix structure of DNA.
DNA is composed of four nitrogenous bases: thymine, adenine, guanine, and cytosine. Guanine and cytosine are linked by three hydrogen bonds, while adenine and thymine are linked by just two. The term for this is complimentary base pairing.
Complementary base pairing is critical for the formation of the helical helix of DNA because it permits the base pairs to be organized in the most energetically favorable manner. It is also essential for replication since it permits semiconservative replication.
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During cellular respiration, which of the following is equal to the total number of carbon, hydrogen, and oxygen atoms in water and carbon dioxide?
Number of carbon, hydrogen, and oxygen atoms in glucose
Number of carbon, hydrogen, and oxygen atoms in oxygen gas
Total number of carbon, hydrogen, and oxygen atoms in glucose and oxygen
Total number of carbon, hydrogen, and oxygen atoms in hydrogen gas and oxygen
Answer:
number of carbon hydrogen and oxygen atoms in oxygen gas
Explanation:
A(n)
is a cellular structure that performs a
specific function in the cell.
Answer:
organelle
Explanation:
Answer:
organelle
Explanation:
each organelle within a cell has a very specific function in the cells role.
hope this helps please mark brainliest!!!
The landing of pollen on the stigma is followed by the growth of the pollen
tube towards the ovule. The pollen tube growth is guided by chemicals released from the pistil of the female flower. What is this type of growth in
the direction of chemicals called?
• positive chemotropism
• negative phototropism
• positive phototropism
Answer:
positive chempotesiem
Explanation:
Predict the likely effect on the ability of substance L to enter the cells if substance L is attached to a large protein instead of free in the
culture.
Answer:
Since the cell membrane is semi-permeable, the likelihood of substance L entering the cell attached to a large protein is lower than that of substance L free in the culture. Substance L enters the cell membrane through active transport, but the cell membrane may block the larger protein, thus blocking substance L, if it is attached to the large protein.
Explanation:
While Congress has the power to create new laws, they can be vetoed by the President. In addition, the Executive Branch must enforce these laws. What two
different constitutional principles are demonstrated by these relationships?
Select one:
A
checks and balances and separation of powers
B.
separation of powers and eminent domain
C
federal supremacy and due process
D.
separation of powers and quartering of troops
Answer:
A, Checks and balances and separation of powers.
Explanation:
Answer:
The correct answer is:
checks and balances and separation of powers
Explanation:
The system of checks and balances refers to instances in which the powers of the branches of government overlap, such as the Executive and the Legislative branch both having some power over the acts passed by Congress. Separation of Powers refers to instances in which separate branches have completely separate responsibilities, as in creating, interpreting, and enforcing the laws. Both of these doctrines are in place to ensure no branch gains too much power.
The human body contains many glands, including the pituitary, thymus, and thyroid. The table below shows the functions of two of these glands. Function 1. Associated with the immune system and is largest in size during teenage years 2. Produces hormones which are required for growth and various body functions Which of the following matches correctly the names of the glands with their functions? Group of answer choices Pituitary—Function 1; Thyroid—Function 2 Thyroid—Function 1; Thymus—Function 2 Thymus—Function 1; Pituitary—Function 2 Pituitary—Function 1; Thymus—Function 2
Answer:
The answer is B
Explanation:
I had did research on both explanations and Thymus is 1st and Pituitary is 2nd. I had looked this question up and yours is a bit different then mine, but I thought I'd stop and help you. :)
Answer:
B
Explanation:
im doing the test now
1. a fluid secretion of the body membranes or linings microorganism
2. a chemical produced by microorganisms that can destroy other bacteria and microorganisms infectious
3. a body condition characterized by yellowness of the skin mucus
4. an organism too small to be seen except with a microscope jaundice
5. spread by infection; causing infection; apt to spread antibiotic
6. tiny single-celled organisms that do not have a nucleus bacteria
Answer:
1.mucus
2.antibodies
3.jaundice
4.microorganisms
5.bacteria
6.archae bacteria
Explanation:
Answer:
1=
2=antibiotic
3=jaundice
4=microorganism
5=infectious
6=bacteria
Explanation:
Which is a FALSE statement about the blood that leaves the heart through the aorta?
A. It is oxygenated.
B. It contains high levels of sugar.
C. It contains high levels of carbon dioxide.
D. It is transported by the arteries to cells throughout the body.
hello,
here is your answer:
**********
Statement C is false. The blood that leaves the heart through the aorta is rich in oxygen.
**********
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:)
Sarah adds 10 g of baking soda to 100 g of vinegar. The mixture begins 20
to bubble. When the bubbling stops, Sarah finds the mass of the resulting
mixture. She determines its mass is 105 g. The data she collected is in the
table. Does this follow the law of conservation of mass? Explain.
Answer:
Yes, the reaction between baking soda and vinegar follows the law of conservation of mass.
Explanation:
The table and data was not attached to the question.
When baking soda and vinegar are mixed together, a chemical reaction occur resulting to release of gas (carbon dioxide gas)
Law of conservation of mass states that the total mass of the reactants in a chemical reaction must be equal to the total mass of the products.
That is mass of reactant = mass of product = 100g + 10g = 110g
Sarah got 105g as product because a gas of mass 5g was released during the reaction.
Sarah found the mass of the resulting
mixture without including the mass of the released gas.
A way to account for the mass of the gas is if the experiment is done in a closed system like zip lock bag to collect and account for the mass of the gas.
When this is done, the law of conservation of mass would be proven.
All the following will give people an indication of your character EXCEPT
Ohow you are dressed.
your body type.
the language you use.
whether you are on time or not.
Brainly if correct 50 points
Answer this plzz!!!
List eight factors that contribute to desertification.
Answer:
include urbanization, climate change, overuse of groundwater, deforestation, natural disasters, and tillage practices in agriculture that place soils more vulnerable to wind.
Explanation:
Interphase lasts for
of a cell's life
98%
80%
50%
20%
Please help I need help nowww pleaseeeeeee
Answer:
80%
Explanation:
Elijah likes the roses in his cousin’s garden. He decides to take the leaves from his cousin’s plant and connect them to his plant, which will result in the growth of a new rose plant. What method of plant propagation did Elijah use?
A.
cutting
B.
air layering
C.
tip layering
D.
mound layering
E.
grafting
Answer:
its cutting
Explanation:
Use the drop-down menus to answer questions about bacteria. Since bacteria are prokaryotes, they have no The outside of a bacterial cell is protected by a structure called a . The provides a rigid structure that gives the cell its shape. The helps to transport ions, nutrients, and waste. allow DNA to be transferred from one bacterium to another. ed2020
Answer:
nucleus
capsule
cell wall
cell membrane
pili
Explanation:
Bacteria are germs present around us as organisms that can be seen through a microscope and not with our na ked eye. They are also present inside of our bodies.
Bacteria
The drop down of the answers related to bacteria are given below:
Bacteria are prokaryotes, and they have no cell nucleus.
The outside of a bacterial cell is covered by a structure called a capsule.
The cell wall provides a rigid structure...
The cell membrane helps to transport ions,...
The Pilus allow DNA to be transferred from one bacterium...
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