PLSSS SOMEONE
Why does evolutionary theory absolutely require the earth to be very
old?
Answer:
Because it takes time for the animals to adapt to their environment, and change their DNA
Answer:
Because evolutions don't happen overnight, it takes years and years for an organism to develop an evolution. So, the earth has to be old, because if we look at the earth when it was young, then we don't really see any evolutions. However, if we look at it when it's old, we can see that there were many evolutions. I hope this helps!
Explanation:
I need help please ?!!!!
A single strand of DNA contains:
Answer:
A single strand of DNA is a polymer of nucleic acids joined covalently between the phosphate group of one and the deoxyribose sugar of the next to for a “backbone” from which the nitrogenous bases stick out. In its natural state, DNA has two strands wound around each other in a double helix.
Explanation:
Does each ecosystem have
the same
limiting factors?
Answer:
No, They vary from ecosystem to ecosystem.
Which one is odd one out on the basis of respiration:
Amoeba, cockroach, earthworm, euglena
Answer:
Cockroach is you answer.
Explanation:
They do this by using a very efficient breathing system that uses air filled tubes, called trachea, to deliver oxygen directly to cells. Oxygen flows in as required into the tracheal system through valves on the insect, called spiracles. But, sometimes, they shut their spiracles and stop breathing.
In North America, many top predators, such as wolves, have been driven nearly to extinction. What effect do you think this has on their main prey, deer? Write your answer below, and discuss with your classmates.
Extinction refers to the elimination of species or groups of organisms due to human-made causes or natural events.
In North America, animals or predators such as wolves have been extinct that can affect the food chain and their prey.
The wolves in North America grew in number to such an extent that government and wildlife agencies developed the rules and regulations to hunt down and kill the wolves, which led them to near extinction.
Wolves feed or attack the deer and are a type of parasitism relationship. In this relationship, wolves are benefitted and deer are harmed.
The extinction of wolves will be led to an increase in the deer population, as deers are the prey and will have no fear from the wolves.
Thus, the deer population will increase in number.
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Small insects can walk across the surface of calm water.
Their feet push the surface of the water down slightly,
somewhat like a person walking across a trampoline, but
they do not break the surface. What is the best
explanation for why this happens?
A. The insects are light enough so that they do not break the hydrogen bonds holding the water molecules
B. The insects actually use their wings to hover slightly above the waters surface and they only skim it with their feet
C. The insects feet are non- polar so they are repelled by the polar water molecules and are pushed away from the waters surface
D. The insects are small enough to see the individual water molecules so they are able to step carefully from one molecule to the next
Answer:
A. Insects are light enough so that they do not break the h bonds holding the water molecules together
Explanation:
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules when they walk across the surface of calm water their feet push the surface of the water down slightly and it is due to surface tension.Thus, option A is correct.
What is surface tension?Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible.
Surface tension is responsible for the shape of liquid droplets and the surface tension of water is about 72 mN/m at room temperature.
Water has a tremendous amount of surface tension due to which small mass distributed effectively on its surface.
Surface tension is represented by the symbol T.
Therefore,the insects are light enough so that they do not break the hydrogen bonds holding the water molecules when they walk across the surface of calm water their feet push the surface of the water down slightly and it is due to surface tension.Thus, option A is correct.
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This is a very important question I need it answered as soon as possible please........
is red sus?
Answer:
HAHAHAHAHAHAH
Explanation:
hmmmm is he acting up??
Where does a secondary consumer get its food?
Answer:
Secondary consumers get their food from from primary consumers(animals that feed on plants e.g goat) only. Eg of secondary consumers are tigers,lions etc.
Components of Nucleic Acids
1. Phosphate
2. Ribose sugar
3. Deoxyribose sugar
4. Uracil
5. Thymine -
6. Adenine
7. Guanine
8. Cytosine
Which components bond with adenine in a section of double-stranded DNA?
has
A-1, 3, 5, and 6 only
B-3 and 5 only
C-2 and 4 only
D-3, 4, 7, and 8 only
Answer:
Explanation:
A
Costal Regions experience moderate temperatures because winds prevent extreme temperatures in these regions which direction of wind makes peace moderate temperatures possible?
A. From the land to the ocean
B. From the ocean to the land
C. Parallel to the ocean
Answer:
From the ocean to land
Explanation:
got it right on edge
From the ocean to the land the extreme temperatures in these regions which direction of wind makes peace moderate temperatures possible.
What is Coastal regions?A significant and expanding share of the world's population lives in coastal regions, which are experiencing environmental deterioration. In underdeveloped nations, the issue is very severe.
Although there are many different causes of environmental decline, population issues are a major contributing element. The majority of the world's population, about 3 billion people, now reside 200 kilometers or less from a shoreline.
That number is probably going to quadruple by 2025. Numerous economic advantages have resulted from the high population density in coastal regions, including enhanced transit infrastructure, urban and industrial growth, and increased revenue.
Therefore, From the ocean to the land the extreme temperatures in these regions which direction of wind makes peace moderate temperatures possible.
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how does the placement of the mica sheet and the direction of light affect the growth of a plant?
Answer:
Explanation:
When the mica plate was inserted on the illuminated side, the plant did bend towards the light. Therefore, the chemical signal was a growth stimulant because the phototropic response involved faster cell elongation on the shaded side than on the illuminated side.
Which example illustrates adhesion?
O water droplets sticking to a window
O water forming a large drop
O water evaporating from a leaf
O water falling from the sky
Answer:
The answer is Water droplets sticking to a window.
What are the (exact) products and reactants for the electron transport chain in cellular respiration?
Answer:
Cellular respiration is the process responsible for converting chemical energy, and the reactants/products involved in cellular respiration are oxygen, glucose (sugar), carbon dioxide, and water. While the exact steps involved in cellular respiration may vary from species to species, all living organisms perform some type of cellular respiration. The equation for aerobic respiration shows glucose being combined with oxygen and ADP to produce carbon dioxide, water, and ATP
Explanation:
What is turgidity? any answer
Answer:
In biology, turgid refers to cells or tissues that are swollen from water uptake. Many cell types in many different organisms can become turgid due to water uptake.Plant cells, in contrast to animal cells, are almost always turgid due to the action of a large vacuole in each of their cells.
Explanation:
Answer: definition :swollen and distended or congested.
Explanation:
Optic nerves travel through the
to ensure that visual signals go to each hemisphere of the brain.
A. optic channel
B. occipital lobe
C. optic chiasm
D. thalamus
Answer:
The answer is C. Optic Chiasm
Explanation:
pls Mark Brainliest
Answer:
optic chiasm
Explanation:
C on edge.
1. The human body maintains a constant internal temperature of 98.2F - 98.8F What changes occur
when the hypothalamus detects a temperature of 95F? Is this a negative or positive feedback?
Body temperature is regulated by negative feedback. The stimulus is when the body temperature exceeds 37 degrees Celsius, the sensors are the nerve cells with endings in the skin and brain, the control is the temperature regulatory center in the brain, and the effector is the sweat glands throughout the body.
Which organisms utilize cellular respiration for energy production?
A. Prokaryotic Cells
B. Eukaryotic Cells
C. Both Prokaryotic and Eukaryotic Cells
D. Only Animal Cells
After plates have been pushed upward by convection currents, gravity pulls them
down and pushes them:
Outward and then Inward
Away and Upward
Inward and Upward
Outward and Away
Answer:
Outward and away
Explanation:
I have the same question on my quiz, and it says I got it right.
Answer: D. Outward and Away
Explanation: I Got it Right on k12 Quiz!
Buffers are substances that help resist shifts in pH by (From the close reading exercises)
A. releasing H+ to a solution when acids are added.
B. donating H+ to a solution when bases are added.
C. accepting H+ from a solution when acids are added.
D. both donating H+ and accepting H+.
Answer:
Buffers are substances that help resist shifts in pH by both donating H⁺ and accepting H⁺ (option D).
Explanation:
A buffer is a chemical substance capable of balancing the pH of a solution, when the balance is altered by the addition of an acid or a base. They are also called cushioning solution, and can be formed by an acid and its base conjugated, with a specific range of action.
The presence of a buffer in a solution has the ability to release hydrogen ions (H⁺) or accept them, helping to balance the pH, in the presence of a base or an acid, respectively. That is, a buffer can yield H⁺ to a solution when there are few or accept H⁺ when its content is high.
The other options are not correct because:
A. Buffers do not release H+ into a solution when acids are added, but accept them.
B and C. Giving up H+ to a solution when bases are added or accepting H+ from a solution when acids are added are effects that buffers can potentially do, which is described in the text above.
the difference between prokaryotic and eukaryotic gene regulation
Answer:
READ THIS
Explanation:
To understand how gene expression is regulated, we must first understand how a gene codes for a functional protein in a cell. The process occurs in both prokaryotic and eukaryotic cells, just in slightly different manners.
Prokaryotic organisms are single-celled organisms that lack a cell nucleus, and their DNA therefore floats freely in the cell cytoplasm. To synthesize a protein, the processes of transcription and translation occur almost simultaneously. When the resulting protein is no longer needed, transcription stops. As a result, the primary method to control what type of protein and how much of each protein is expressed in a prokaryotic cell is the regulation of DNA transcription. All of the subsequent steps occur automatically. When more protein is required, more transcription occurs. Therefore, in prokaryotic cells, the control of gene expression is mostly at the transcriptional level.
Eukaryotic cells, in contrast, have intracellular organelles that add to their complexity. In eukaryotic cells, the DNA is contained inside the cell’s nucleus and there it is transcribed into RNA. The newly synthesized RNA is then transported out of the nucleus into the cytoplasm, where ribosomes translate the RNA into protein. The processes of transcription and translation are physically separated by the nuclear membrane; transcription occurs only within the nucleus, and translation occurs only outside the nucleus in the cytoplasm. The regulation of gene expression can occur at all stages of the process (Figure 1). Regulation may occur when the DNA is uncoiled and loosened from nucleosomes to bind transcription factors (epigenetic level), when the RNA is transcribed (transcriptional level), when the RNA is processed and exported to the cytoplasm after it is transcribed (post-transcriptional level), when the RNA is translated into protein (translational level), or after the protein has been made (post-translational level).
Answer:
Prokaryotic gene expression is primarily controlled at the level of transcription. Eukaryotic gene expression is controlled at the levels of epigenetics, transcription, post-transcription, translation, and post-translation.
im doing the edge 2020 assinment right now PLS HELP ME!!!!!!!
Which worker is commonly employed by the government?
Factory Supervisor
Agricultural Inspector
Cleaning Worker
Slaughterhouse Butcher
Answer:
a aaaaaaaaaaaaaaaaaaa
Answer:
B Agriculture Inspector
Explanation:
I got it right on the instruction on Edge 2020-2021 have a nice day :3
Name and describe the five types of active transport systems.
Answer:
Please Mark as Brainliest. Please!!!!!!!!!!
Explanation:
Definition
Active transport is the process of transferring substances into, out of, and between cells, using energy. In some cases, the movement of substances can be accomplished by passive transport, which uses no energy. However, the cell often needs to transport materials against their concentration gradient. In these cases, active transport is required.
Active transport requires energy to move substances from a low concentration of that substance to a high concentration of that substance, in contrast with the process of osmosis. Active transport is most commonly accomplished by a transport protein that undergoes a change in shape when it binds with the cell’s “fuel,” a molecule called adenosine triphosphate (ATP).
For example, one type of active transport channel in the cell membrane will bind to the molecule it is supposed to transport – such as a sodium ion – and hold onto it until a molecule of ATP comes along and binds to the protein. The energy stored in ATP then allows the channel to change shape, spitting the sodium ion out on the opposite side of the cell membrane. This type of active transport directly uses ATP and is called “primary” active transport.
Another type of active transport is “secondary” active transport. In this type of active transport, the protein pump does not use ATP itself, but the cell must utilize ATP in order to keep it functioning. This will be explained in more depth in the section on Symport Pumps below.
Lastly, active transport can be accomplished through processes called endocytosis and exocytosis. In exocytosis, a cell moves something outside of itself in large quantities by wrapping it in a membrane called a vesicle and “spitting out” the vesicle. In endocytosis, a cell “eats” something by wrapping and re-forming its membrane around the substance or item.
Each type of active transport is explained in more detail below.
Types of Active Transport
Antiport Pumps
Antiport pumps as an example of active transport
Active transport by antiport pumps
Antiport pumps are a type of transmembrane co-transporter protein. They pump one substance in one direction, while transporting another substance in the opposite direction. These pumps are extremely efficient because many of them can use one ATP molecule to fuel these two different tasks.
One important type of antiport pump is the sodium-potassium pump, which is discussed in more detail under “Examples of Active Transport.”
Symport Pumps
Symport pumps take advantage of diffusion gradients to move substances. Diffusion gradients are differences in concentration that cause substances to naturally move from areas of high to low concentration.
In the case of a symport pump, a substance that “wants” to move from an area of high concentration to low concentration down its concentration gradient is used to “carry” another substance against its concentration gradient.
One example of a symport pump – that of the sodium-glucose transport protein – is discussed below under “Examples of Active Transport.”
Sympoter pump as an example of active transport
Active transport by symporter pumps
Endocytosis
In the third type of active transport, large items, or large amounts of extracellular fluid, may be taken into a cell through the process of endocytosis.
what is an acid? What is a base?
Answer:
An acid is a substance that donates hydrogen ions. Now there are more hydrogen ions than hydroxide ins in the solution. This kind of solution is acidc. A base is a substance that accepts hydrogen ions. When a base is dissolved in water, the balance between hydrogen ions and hydroxide ions moves the other way.
Explanation:
Answer:
An acid–base reaction is a chemical reaction that occurs between an acid and a base. It can be used to determine pH.
Explanation:
An acid is a substance that donates protons or accepts a pair of valence electrons to form a bond.
A base is a substance that can accept protons or donate a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids.
Im sorry but i need the answer to this question to...
Answer:
A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension. ... Because the dispersed particles of a colloid are not as large as those of a suspension, they do not settle out upon standing.
Hope that helps!♡
I will mark BRAINLIEST
Which of the following does not occur in an aquatic ecosystem as a result of nutrient loading?
a. acidification of the water
b. algae growth as a result of eutrophication
c. degraded quality of water for human and livestock consumption
d. improved water habitats for human recreation
Answer:
D
Explanation:
Egdenuity 2022
Improved water habitats for the human recreation does not occur in an aquatic ecosystem as a result of nutrient loading. Thus, the correct option is D.
What is Nutrient loading?Nutrient loading means the total amount of a nutrient such as elements like nitrogen or phosphorus entering the water during a given time period, such as tons of nitrogen per year, or pounds of phosphorus per day. Nutrients may enter into the water from runoff, ground water recharge, point source discharges, or the air particles.
Improved water habitats for the human recreation does not occur in an aquatic ecosystem as a result of nutrient loading.
Therefore, the correct option is D.
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the diagram shown represents a dihybrid cross between two pea plants heterozygous for both seed color and seed shape.
what is the phenotypic ratio of the offspring?
A. 1:1:1:2:2:2:2:4
B. 1:3:3:9
C. 1:4
D. 4:12
Answer:
1:3:3:9
Explanation:
There are 12 yellow seeds, from which 9 are smooth and 3 are rough.
There are 4 green seeds, from which 3 are smooth and only 1 is rough.
Both the appearance and color of the seeds is something you need to look out for when dealing with phenotypes.
The phenotypic ratio of this dihybrid cross will be 1:3:3:9.
What is phenotype?The term phenotype simply refers to a trait that may be observed. Pheno means observe and is derived from the same root as "phenomenon." As a result, it's a sort of organism that can be seen, and it may relate to anything from a common characteristic like height or hair color to the presence or absence of disease.What is dihybrid cross?A mating experiment between two animals that are identically hybrid for two features is referred to as a dihybrid cross. A heterozygous organism is one that possesses two distinct alleles at the same genetic location, or locus.The cross between a homozygous pea plant with round yellow seeds and wrinkled green seeds is an example of a dihybrid cross.RRYY alleles are found in round yellow seeds, while rryy alleles are found in wrinkled green seeds.Hence the correct option is B.
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1. Name one consumer in the food web. 2. Name one producer in the food web. 3. What provides energy for the producers in the food web: 4. Name one herbivore in the food web: 5. Name one carnivore in the food web: 6. Name one omnivore in the food web: 7. Name one top perdator in the food web. 8. Name one top predator in the food web: 9. Name one example of the owl's prey:
1. Lion
2. trees
3. Plants, basically things that can make its own food
4. giraffe
5. hyena
6. humans
7. Tiger
8. Basically same as 7
9.mice
Which of the following is an example of how enzymes are catalyst?
A. Enzymes can alter the free energy change (∆G) for a chemical reaction.
B. Enzymes increase the free energy of the reactants to make the reaction go faster.
C. Enzymes provide the activation energy for the reactions they facilitate.
D. Enzymes lower the activation energy so that reactants absorb enough energy to reach transition state.
Answer:
d
Explanation:
FREE BRAINLEST (I think that’s how it’s spelt lol don’t make fun of me)
WHOEVER CAN MAKE ME LAUGH FROM A FUNNY JOKE OR STORY WILL GET IT!
GOOD LUCK!~
Answer:
girl ummmmmmm,,,,, i need these points so...why did the chicken cross the road? to get to the other BAWK *gets hit by car and dies*
Answer:
joke
Explanation:
once there was a boy that was eating icecream with his grandma he was so concentrated on eating icecream that he bumped on someone and the icecream fall, he wanted to take it from the floor and eat it again, but his grandma said ''no fallen things are no longer edible'' then after a while the grandma felt ill and fell to the floor then she said grandson help me to stand up and the boy says '' no grandma, we cannot peak up fallen things