Answer:
78 percent
Explanation:
The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
What protects the outer layer of all the cells
True or False: If you break / cut a magnet in half, two magnets (each with a North and South pole) will be created.
Answer:
true
Explanation:
the gratational pole attrachts it
What is the definition of taxonomy?
A. A science, law, or principle of classification that helps build taxonomic trees that map the development and evolution of a species
B. A science, law, or principle of classification that allows biologists to map the development of species that are still evolving
C. A science, law, or principle of classification that helps classify information on a species based purely on their Genus and Species
Answer:
Option (C) is the correct answer.
Explanation:
Taxonomy: It is a process of classifying, organizing, and naming things such as plants, animals, microorganisms, and other living things.
Carolus Linnaeus a father of taxonomy,
Taxonomy utilizes hierarchical arrangement.
There are eight taxonomic categories:
Domain
Kingdom.
Phylum.
class.
Order.
family.
genus
Species.
What was happening in history when this mutation took off in parts of Europe and Africa?
PLEASE SOMEONE HELP ME I’M REALLY STRUGGLING
Answer:seventy-seven thousand years ago, a craftsman sat in a cave in a limestone cliff overlooking the rocky coast of what is now the Indian Ocean. It was a beautiful spot, a workshop with a glorious natural picture window, cooled by a sea breeze in summer, warmed by a small fire in winter. The sandy cliff top above was covered with a white-flowering shrub that one distant day would be known as blombos and give this place the name Blombos Cave.
Explanation:
What is the role of helicase in DNA replication?
Answer:
The helicase is essential because they separate the double-stranded DNA into single strands so that it could be copied.
Hoped this helped!
how those a living organism obtain energy from eating food
Answer:
Their cells are able to turn sunlight into food through a process called photosynthesis. In photosynthesis, producers combine carbon dioxide, water, and sunlight to produce oxygen and sugar (their food). Other organisms get energy by eating producers. ... It cannot directly use the Sun's energy to make food.
Explanation:
Answer: Their cells to turn sunlight into food through a process called photosynthesis. In photosynthesis producer combine carbon dioxide water, and sunlight to produce oxygen and sugar (tandem then makes there food).
Explanation:
Hope this helps
Wolves that live in snowy climates often prey on rabbits. Some rabbits can move quickly across deep snow because they have large feet that don’t sink into the snow. Rabbits without this adaptation move more slowly across the snow. Which statement best justifies how the rabbit population changes over time?
A. Sea coral would make immediate adaptations through genetic mutations to adjust to the changes in the environment.
B. The ocean water would change its current so that the acidic water is relocated to another area and allow sea coral to survive.
C. The ocean water would change its composition to reduce the amount of carbon dioxide contained and allow sea coral to survive.
D. Sea coral would become extinct because of its inability to make adaptations fast enough to adjust to the changes in the environment
Answer:
It's A
Explanation:
Just like the corals have genetic mutations to adapt to their environment so do the rabbits change their genetic characteristics to make sure the species continue it's lineage by evolving and growing their feet so they can be faster and not sink in the snow, becoming harder preys to catch, otherwise, if their paws were smaller, they would be slower and, therefor, an easy catch for the wolves, probably becoming extinct after awhile.
The statement that justifies how the rabbit population changes over time is sea coral would make immediate adaptations through genetic mutations to adjust to the changes in the environment. So, the correct option is A.
What is Adaptation?Adaptation is the process by which a species becomes fitted to its environment; it is the result of natural selection's acting upon heritable changes.
Rabbits have to change their genetic characteristics same as the coral have genetic mutations to adapt to their environment and to make sure the species continue its downstream by evolving and growing their feet, so they can run faster in the snow and successfully escape from predators. If rabbits are not evolved with an environment that does not favor them, they are surely eliminated from nature.
Therefore, the statement that justifies how the rabbit population changes over time are sea coral would make immediate adaptations through genetic mutations to adjust to the changes in the environment.
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Using this passage, fill in the blank with either G1, G2, or G3. (1) All dogs are mammals. (2) All mammals are things with hair. Therefore, (3) All dogs are things with hair. (1) All _____ are _____. (2) All _____ are _____. Therefore, (3) All _____ are _____. Question 5 options: Blank
Answer:
Given the values for G1, G2, and G3, the blank spaces are filled below.
Explanation:
Assuming that
G1 = dogs
G2 = mammals
G3 = things with hair
Then
(A) All G1 are G2
(B) All G2 are G3
(C) Therefore, all G1 are G3
If it takes a frog 5 minutes to jump 3 blocks, how long will it take for him to jump 15 blocks?
Answer: It will take the frog 25 minutes.
Explanation:
Where does the water that a land plant uses for photosynthesis come from? The water comes from _____.
-Evaporation
-Condensation
-Precipitation
Answer:
precipitation
Explanation:
Goats can either be polled or horned. The pulled, or no horn, trait (P) is dominant to the horned (p) trait. Another trait in goats are wattles, which are hair covered structures on their necks. Even though most goats do not have wattles, having wattles (W) is dominant to not having wattles (w). A breeder crosses a polled, wattled male goat with a polled, wattled female goat. Some of the offspring have horns and no wattles. Perform a cross of the parental genotypes to find the phenotypic ratios of the offspring.
Answer:
Pulled and wattled = 9/16
Pulled and no wattle = 3/16
horned and wattled = 3/16
horned and no wattle = 1/16
Explanation:
Pulled = P, Horned = p
Wattled = W, no wattle = w
Polled, wattle goats = P_W_
Since they produced offspring with horns and no wattles (ppww), it means both parents have the recessive allele for each trait. Hence, they are both heterozygotes with PpWw as genotypes.
PpWw x PpWw
Genotypes ratio of the offspring:
P_W_ - 9/16
P_ww - 3/16
ppW_ - 3/16
ppww - 1/16
Phenotype ratio of the offspring:
Pulled and wattled = 9/16
Pulled and no wattle = 3/16
horned and wattled = 3/16
horned and no wattle = 1/16
(See the attached image for the Punnet's square)
Some alleles of a gene are dominant to others masking the effect this other alleles.
The polled, or no horn, trait (P) is dominant to the horned (p) trait.
Having wattles (W) is dominant to not having wattles (w).
A breeder crosses a polled, wattled male goat with a polled, wattled female goat.
The phenotypic and genotypic ratios would be
Polled and wattled = P_W_ = 9/16Polled with no wattle = P_ww = 3/16horned and wattled = ppW_ = 3/16horned with no wattle = pwpw = 1/16Parent genotype --- polled, wattled male and female goat -- P_W_
As the cross produced offspring with horns and no wattles (ppww), it shows both parents have the recessive allele for each trait.
Hence, they are both heterozygotes with PpWw for the traits.
Parent genotypes: PpWw x PpWw
PW Pw pW pw PW Pw pW pw
PW Pw pW pw
PW PPWW PPWw PpWW PpWw
Pw PPWw PPww PpWw Ppww
pW PpWW PpWw ppWW ppWw
pw PpWw Ppww ppWw ppww
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How do woollen clothes keep us warm?
Answer:
wool hair fibres act as an insulator to trap the air inside the cloth, which helps stabilise your body temperature.
Which of the following is an example of two organisms competing for an abiotic factor?
A. Two different species of insects
competing for leaves from trees
B. Two different species of
mammals competing for small
rodents to eat
C. Two different species of birds
competing for berries to eat
D. Two different species of
mammals competing for the
same water source
Two different species of mammals competing for the same water source is an example of two organisms competing for an abiotic factor.
What is abiotic factor?
Abiotic factors refers to non-living physical parts of the environment that affect living organisms as well as the functioning of ecosystems. In the above example, water source is a non-living part of an ecosystem which is required by both organisms.
This leads to competition of two mammals so we can conclude that two different species of mammals competing for the same water source is an example of two organisms competing for an abiotic factor.
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Why might it be important for population ecologists to know the factors that allowed the population to grow at exponential rates?
because they think they be cool with popularity when they look like fools
Is the human fossil record complete? Explain your answer.
2.
Which two of the following structures are found in both prokaryotic and eukaryotic cells?
ribosomes
© vacuole
O cell membrane
® Golgi bodies
O nucleus
E endoplasmic reticulum
Why is the proton pump important to animal cells?
Answer:Transport of the positively charged proton is typically electrogenic, i.e. it generates an electrical field across the membrane also called the membrane potential. ... In cell respiration, the proton pump uses energy to transport protons from the matrix of the mitochondrion to the inter-membrane space.
Explanation:
Give examples of three paramedic plants
Answer:
In other side there are 10 common medicinal plants
lavendarthymemintaloe vera basilsunflowers e.t.cExplanation:
hope it helps you ^^
How does uplift change the surface of Earth?
O A. Snow melts on the surface of Earth, causing rivers to form.
B. Magma rises from the surface of Earth, causing lava beds to form.
O C. Wind blows across the surface of Earth, causing sand dunes to form.
O D. Pressure builds under the surface of Earth, causing mountains to form.
Answer/ Explanation:
B. Magma rises from the surface of Earth, causing lava beds to form.
From below or decreasing downward force weigh from above. During uplift, land, as well as the sea floor, rises. All this movement can cause rocks that were once underground to be brought up to the Earth's surface. This process is called uplift.
Propose an explanation for why humans have experienced exponential growth since the Industrial Revolution? (why was our population able to live longer and reproduce more successfully). What do we have access to now that was nonexistent or difficult to access in the past?
Answer:
The Industrial revolution increased chances of survival for human due to technology and increased ways to get food
Explanation:
The human population of the planet increased gradually for more than 10,000 years after the Agricultural Revolution. As the population continues to grow, competition for resources will increase. Natural disasters and political conflicts will exacerbate the problems, especially in the more stressed regions of developing nations. The survivors of this competition will likely be determined by factors such as place of birth and educational opportunities.
Suppose you have a friend who wastes a lot of electricity and other resources, What could you say to your friend to encourage him or her to change some of those wasteful habits?
Answer:
talk about respect and communicate
Explanation:
if you dont want your friend doing thoes stuff talk to them
A student is making observations of puddles after rain. They noticed that when the sun comes out right after it rains, puddles disappear more quickly than when it stays cloudy. What is a possible explanation for this?
A. There is no difference in the energy when it is cloudy or sunny.
B. The same amount of energy is always available in the environment.
C. There is more energy in the environment when it is cloudy.
D. There is more energy in the environment when it is sunny.
Answer:
i think it is c
Explanation:
A Class-A 10 mL pipette is supposed to dispense 10.00 mL of water. A lab technician makes three measurements of the volume that the pipette actually dispenses, and obtains volumes of 9.70 mL, 9.69 mL, and 9.71 mL. The pipette is:__________
a) Accurate, but not precise
b) Precise, but not accurate
c) Accurate and precise
d) Neither accurate or precise
Answer:
d) Neither accurate or precise
Explanation:
Accuracy and precision are critical factors in the experimental procedure. Accuracy can be defined as the amount of uncertainty in the process of measurement in relation to the true value (in this case, 10 mL). On the other hand, precision is an independent feature of the accuracy which indicates the repeatability of the measurement process (in this case, three measures weren't repeated). Therefore, precision indicates the confidence of a particular measurement, while accuracy indicates how close is this value to the real value.
2. A batch of 100 offspring is grown from a cross between a parent with a green stem and a mystery parent. All of the offspring have purple stems. What must be true
of the mystery parent?
O A The mystery parent must have the genotype ANLIANL.
OB. The mystery parent must have the genotype ANL/anl.
O c The mystery parent must have the genotype anl/anl.
OD Nothing can be determined about the genotype of the mystery parent.
Answer:
a
Explanation:
mystery plant has dominant genes that cause purple stems
What is the difference between the weather conditions to form a hurricane and a tornado?
Answer:
difference between a hurricane and a tornado is there needs to be warm ocean water and moist, humid air in the region (hurricane)
The warm air rises through the colder air, causing an updraft. (in tornado)
Do humans have an open or closed circulatory system? Explain.
Answer:
Explanation:
Organisms have different forms of circulatory systems. Humans have a closed circulatory system, while many mollusks and other invertebrates have an open system. In a closed circulatory system, blood is enclosed within blood vessels.
How does farming affect biodiversity
[tex]\textbf{ANSWER:}[/tex]
Livestock farming is one of the most significant sources of excess nitrogen and phosphorous pollution. These compounds can deplete oxygen in lakes and rivers by causing excessive vegetation and algae development. Eutrophication, or the loss of biodiversity, is a result of this process.
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Have a great day!
when white light passes throught a prism, what can be discovered?
Answer:
Isaac Newton's 1666 experiment of bending white light through a prism demonstrated that all the colors already existed in the light, with different color "corpuscles" fanning out and traveling with different speeds through the prism.
Answer:
a rainbow!
Explanation:
5. A student is studying how sound travels
through a solid medium by timing
the movement of sound through a
boulder when the boulder is at different
temperatures. Using the information above,
how fast will sound move through the
boulder when it reaches 20°C?
Answer:
570 m/s
Explanation:
The speed of sound is a measure of how fast sound travels through a medium. The speed of sound through various media varies. Sound travels fastest through solids and slowest through gases for example air.
The temperature of a medium affects the speed of sound through that medium. The higher the temperature, the faster sound travels through the medium. This is because, as the temperature of the medium increases, the particles of the medium vibrates faster and faster, thus sound waves are able to be propagated faster through that medium.
From the information provided in the attachment, the speed of sound through the boulder increase by 2 m/s for every 5°C rise in temperature. Therefore, the speed of sound through the boulder when it reaches 20°C will be 570 m/s
Explain why countercurrent flow met the goals and why parallel flow did not meet the goals.
Answer:
Countercurrent flow met the goals due to difference in concentration gradient.
Explanation:
Countercurrent flow met the goals because it flows in opposite direction while on the other hand, parallel flow did not meet the goals because it flows in the same direction. For example. the blood flows in one direction and the dialysate flows in the opposite direction. The countercurrent flow of the blood and dialysate increases the concentration gradient between the blood and dialysate. The increased gradient helps to remove more potassium, phosphorus and urea from the blood. If we used parallel flow so less concentration gradient of solutes is present and hence, less potassium, phosphorus and urea are removed from the blood
In fluid or a flowing body when there is interexchange or a crossover of some fluids with each other is called countercurrent flow while when the fluid flows in the same direction then it is called parallel flow.
Countercurrent meets goals because of concentration gradient differences.
Countercurrent and parallel flow can be explained as:The goals are met in countercurrent because of the opposite direction while in parallel they are not achieved because of the same direction.Countercurrent flow in fishes helps them to increase the blood oxygen level from water as this system help them efficiently maximize the oxygen needed for respiration.If the parallel flow is used then the concentration gradient would be less and hence less oxygen will be available from the water to fishes.Therefore, countercurrent achieves its goal while parallel dies not.
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