Answer:
The molecule now known as DNA was first identified in the 1860s by a Swiss chemist called Johann Friedrich Miescher. Johann set out to research the key components of white blood cells. part of our body's immune system. The main source of these cells was pus-coated bandages collected from a nearby medical clinic.
Explanation:
A land based global community of organisms is called a?
Suppose an entire colony of lemmings is chased by a predator and most of them jump off a cliff and perish. Fortunately, a few of them don't jump and re-establish their colony (Re-established Colony) and a few of the jumpers land in the water, survive the fall and establish a second colony on a nearby island (Island Colony). Which of the following characterizes the type of change causing a reduction in the genetic variation that occurs in these 2 colonies?
Answer:
re-established colony is bottleneck effect and island colony is a founder effect
Explanation:
since the re-established colony was created after the death of a large number of lemmings, it was a random event so it is a bottleneck effect. the surviving lemmings that jumped into water made their own, new population, which would be a founder effect
The re-established colony is the result of the bottle-neck effect, while the island colony is the result of the founder effect. In both situations, there will be a reduction in genetic diversity.
What do you mean by Genetic variations?Genetic variations may be defined as the presence of differences in the sequence of genes between individuals organisms of a species.
In an island colony, a founder effect may arise which states that a few individuals of lemmings from a population start a new population with a different allele frequency than the original population.
In the re-established colony, a genetic bottleneck changes the genetic variation, which develops when a population undergoes a drastic reduction in population size.
Therefore, the re-established colony is the result of the bottle-neck effect, while the island colony is the result of the founder effect.
To learn more about Genetic Drift, refer to the link:
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After a month of heavy rain, a formerly clear pond on a golf course is covered with slimy green algae. What do you think happened?
Question and Answer options in photo.
Zoom in if needed
Help :(
Answer:
I belive that the answer is B
Explanation:
I believe that it's B because if the rabit population continued to grow then it will allow the soil to become more fuirtle because of the dropings that the rabbits leave behind. This would cause more plants and growth in the habitat, which would lead to economic growth
I hope this helps!
How does energy transfer from the hot water to the cold air
Answer:
humidity and evaporation
Explanation:
HELP!!! 50PTS!!! AND WILL BE MARKED BRAINLIEST!!!
Which of the following best describes evidence from comparative biochemistry that supports the theory of evolution? (4 points)
Different mechanisms of reproduction exist within the same species.
Different metabolic pathways exist within the same species.
Different species have the same genetic code.
Different species have the same number of chromosomes.
Answer:
1. Asexual reproduction includes fission, budding, fragmentation, and parthenogenesis, while sexual reproduction is achieved through the combination of reproductive cells from two individuals.
2. Anabolism & Catabolism
3. Nearly everybody has the same genetic code. Although the sequences of bases in their DNA (and thus in the messenger RNA that is made from their DNA) vary between species and even between individuals within a species, almost all of them use the same code.
4.Yes, two or more species can have the same number of chromosomes. ... There's much more to differentiating between species than number of chromosomes. For one example, there are proteins present on eggs which 'match up' with proteins on sperm, and these are very specific.
Hope this helps!!
if there is 8 g of a substance before a physical change, how much will there be afferwards
Answer:
The correct answer is 8 g.
Explanation:
During a physical change, the identity of the substance does not change, because no chemical reaction occurs. So, after the change, the amount of substance is still the same. Examples of physical changes are changes in the state of matter (solid-liquid-gas). If 8 grams of ice (water in the solid-state) are melted, after the melting process we will have 8 grams of water in the liquid-state, but still 8 grams of water.
which of the following organisms has the simplest cellular structure? a. bacterium b. earthworm c. mushroom d. sunflower
Bacteria will have the simplest cellular structure. So the correct option is A.
What are prokaryotic cells?A cell type without a genuine nucleus or membrane-bound organelles is referred to as prokaryotic. All the other types of life are eukaryotic, whereas organisms in the categories of Bacteria and Archaea are centered on the prokaryotic cell.
Prokaryotic species, on the other hand, are exceedingly prevalent and account for a large portion of the biomass on Earth.
Unicellular organisms are those that have prokaryotic cells. We refer to them as "prokaryotes." A prokaryotic cell may operate as a live creature thanks to a number of factors. Prokaryotes have a cell membrane covering them at first.
With the help of this membrane, they may engineer a particular environment for metabolic processes within the cytosol. Second, these cells contain both ribosomes and free DNA.
Even though ribosomes are organelles, a plasma membrane does not enclose them.
Therefore the correct option is A.
Read more about prokaryotes, here
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At Weeks Bay there was a population of 200 alligators. In May of 2006 a new species of catfish was released into the Mississippi. These catfish reproduce very fast and soon become a rich food source for the alligator population. This provides the alligators with the energy needed for more successful reproduction. The following summer of 2007, 100 babies were born and a total of 40 gators died that year. However, the next year in early 2008 there was a terrible drought, causing 100 alligators to die.
2. What is the growth rate (r) of the alligator population during 2007?
Answer:
1. 260
2.
3. drought
4. babies born
6. carrying capacity
7. population density
8. logistic growth
9. exponential curve
Explanation:
A light detector the pattern shown. What is the most likely location of the light detector..
A.Location A
B.Location B
C.Location C
D.Location D
Answer:
d
Explanation:
The giant panda has six fingers on its paws instead of five, and its favorite food is
bamboo. How does this adaptation help the panda to survive?
O It allows the panda to digest the bamboo faster.
It allows the panda to reach the taller bamboo stalks.
It helps the panda climb the bamboo stalks more quickly.
It helps the panda hold large bamboo stalks as it feeds.
Answer:
C:It helps the panda climb the bamboo stalks more quickly.
Explanation:
I got it correct on a quiz
Answer: Option (C) is correct
It helps the panda climb the bamboo stalks more quickly.
Explanation: Hope it helps!
Good luck!
create a mnemonic for the word CIRCULATORY SYSTEM on how we can take good care of our Circulatory system.
*WILL GIVE BRAINLIEST FOR BEST ANSWER DONT ANSWER IF YOU DONT KNOW AND NO VIRUS LINKS OR I WILL REPORT YOU!!!*
What is one result of meiosis?
A. two diploid cells
B. four diploid cells
C. two haploid cells
D. four haploid cells
Answer:
The final product of Meiosis is haploid daughter cells in which each cell has 23 chromosomes. What happens in meiosis is that, the cell is divided twice and this produces four daughter cells. During this process that our sex cells are produced. So the answer for this would be option D.
Explanation:
Answer:
D
Explanation:
Hope this helps! have a great day.
Also the people who post virus links are bots. They dont understand anything
Name the carbohydrate which forms cell wall
Answer:
Cellulose
hope this answer helps you...
The opening in leaves necessary for photosynthesis is call the
Answer:
I kinda think it's stomata
Excretory system label, please help will BRAINLIST first correct answer (if you scam with link I will report!).
Answer:
© CK-12 (Middle School)
Terms of Use
Licensed under
Questions have been modified from original.
ASSIGNMENT DIRECTIONS
As you read, think about the following: How can the excretory system be compromised?

1
Why drink water?
2
It's always a good idea to drink plenty of fluids, especially when you have been exercising. Drinking plenty of water helps to flush away materials that might form kidney stones. Staying hydrated is the best way to prevent kidney stones.
Problems of the Excretory System
3
The urinary system controls the amount of water in the body and removes wastes. Any problem with the urinary system can also affect many other body systems.
Kidney Stones
4
In some cases, certain mineral wastes can form kidney stones (Figure below). Stones form in the kidneys and may be found anywhere in the urinary system. Often, stones form when the urine becomes concentrated, allowing minerals to crystallize and stick together. They can vary in size, from small stones that can flow through your urinary system, to larger stones that cannot. Some stones cause great pain, while others cause very little pain. Some stones may need to be removed by surgery or ultrasound treatments.
5
A kidney stone. The stones can form anywhere in the urinary system.
6
What are the symptoms of kidney stones? You may have a kidney stone if you have pain while urinating, see blood in your urine, and/or feel a sharp pain in your back or lower abdomen (the area between your chest and hips). The pain may last for a long or short time. You may also have nausea and vomiting with the pain. If you have a small stone that passes on its own easily, you may not experience any symptoms. If you have some of these symptoms, you should see your doctor.
QUESTION 1 DOK 3 NO STANDARD
Why does the author argue that "staying hydrated is the best way to prevent kidney stones?"
EXTRA HELP
What are kidney stones?
When do they form: When a person has drank a lot of water or not enough water?
Kidney failure
7
Kidney failure happens when the kidneys cannot remove wastes from the blood. If the kidneys are unable to filter wastes from the blood, the wastes build up in the body. Kidney failure can be caused by an accident that injures the kidneys, the loss of a lot of blood, or by some drugs and poisons. Kidney failure may lead to permanent loss of kidney function. But if the kidneys are not seriously damaged, they may recover.
8
Chronic kidney disease is the slow decrease in kidney function that may lead to permanent kidney failure. A person who has lost kidney function may need to get kidney dialysis. Kidney dialysis is the process of filtering the blood of wastes using a machine. A dialysis machine (Figure below) filters waste from the blood by pumping the blood through a fake kidney. The filtered blood is then returned to the patient’s body.During dialysis, a patient’s blood is sent through a filter that removes waste products. The clean blood is returned to the body.
QUESTION 2 DOK 2 NO STANDARD
Why is kidney dialysis a solution for patient's with kidney failure?
EXTRA HELP
What is kidney failure?
What does a dialysis machine do? How does this help a patient with kidney failure?
Urinary tract infections (UTIs)
9
Urinary tract infections (UTIs) are bacterial infections of any part of the urinary tract. When bacteria get into the bladder or kidney and produce more bacteria in the urine, they cause a UTI. The most common type of UTI is a bladder infection. Women get UTIs more often than men. UTIs are often treated with antibiotics.
10
Most UTIs are not serious, but some infections can lead to serious problems. Long lasting kidney infections can cause permanent damage, including kidney scars, poor kidney function, high blood pressure, and other problems. Some sudden kidney infections can be life threatening, especially if the bacteria enter the bloodstream, a condition called septicemia.
11
What are the signs and symptoms of a UTI?
- a burning feeling when you urinate,
- frequent or intense urges to urinate, even when you have little urine to pass,
- pain in your back or side below the ribs,
- cloudy, dark, bloody, or foul-smelling urine,
- fever or chills.
12
You should see your doctor if you have signs of a UTI. Your doctor will diagnose a UTIs by asking about your symptoms and then testing a sample of your urine.
QUESTION 3 DOK 1 NO STANDARD
What is a UTI and why is it problematic?
EXTRA HELP
What is a UTI? Refer back to paragraph 9.
What is problematic about UTIs? Refer back to paragraph 10.
Summary
Disorders of the urinary system include kidney stones, kidney failure, and urinary tract infections.
Kidney dialysis is the process of filtering wastes from the blood using a machine.
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Make a list of items in a kitchen that come from land resources.
Answer:
water, Wooden supplies, food from farms, and counters made from minerals.
Explanation:
The list of items in a kitchen that come from land resources include the
following:
CabinetsChairsCutlery etc.What are Land resources?These are the resources which are present on land and examples include
wood, minerals etc.
Land resources are usually refined and used in the production of various
types of things as listed above.
Read more about Land resources here https://brainly.com/question/2067425
What organelle regulates cell contents?
A. Ribosome
B. Vacuole
C. Nucleus
D. Cell Membrane
HELP ME PLEASE
which came first the chicken or the egg (this is for a school asignment i promise)
Answer:
fs the chicken
Explanation:
Answer:
two birds that weren't really chickens created a chicken egg, and hence, we have an answer: The egg came first, and then it hatched a chicken.
Explanation:
What is the phenomenon responsible for wind and surface currents bending to the right or to the left?
Answer:
I believe what you are referring to is the Coriolis Effect.
Explanation:
Because the Earth rotates on its axis, circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere.
the skill and courage of the Tuskegee airmen served to
Answer:
can u help me with my question and then ill help u
Explanation:
they served to decrease opposition to the integration of the armed forces.
What happens when plates meet? (4 complete sentences minimum)
Answer:
If two tectonic plates collide, they form a convergent plate boundary. Usually, one amongst the converging plates will move beneath the opposite, a process called subduction. ... The new magma (molten rock) rises and will erupt violently to make volcanoes, often building arcs of islands along the convergent boundary. When two plates are moving far from one another, we call this a divergent plate boundary. Along these boundaries, magma rises from deep within the world and erupts to make new crust on the lithosphere. Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges. While the method of forming these mountain ranges is volcanic, volcanoes and earthquakes along oceanic spreading ridges aren't as violent as they're at convergent plate boundaries.
Explanation:
why do scientists use binomial nomenclature to name organism
Answer:
Binomial nomenclature is used to avoid confusion among the names the organisms. ... If we call all these organisms by different names, no organism can ever be identified globally. Hence the system of binomial nomenclature was introduced where each organism is named using its genus and species name (in Latin).
Explanation:
please give me brainlist and follow
Provide an example of how your body could maintain homeostasis in response to detecting that the body temperature was falling below 98.5 degrees.
Answer:
Our body produces heat energy.
Explanation:
When our body temperature decreases than normal range, our body produces heat to maintain internal heat in the normal range. Our internal body temperature is regulated by hypothalamus which is a part of our brain. The hypothalamus regulate the temperature and take actions to maintain it in the normal range of temperature which is about 37°C. If our body temperature is too low, the hypothalamus order to the body to generates heat energy and maintains heat in the normal range. The sweat glands remain inactive in order to prevent heat losses.
during what stage do you have sleepwalking and sleep talking?
Sleepwalking occurs all through non-REM (NREM) sleep, normally in level 3 of the sleep cycle, which is likewise called deep sleep. Along with other parasomnias like sleep speakme, confusional arousals, and sleep terrors, sleepwalking is assessed as an NREM sickness of arousal.
Why was the evolution of cyanobacteria such a significant event in Earth's history
Explanation:
oxygen, a byproduct of that photosynthesis, was released into the atmosphere, changing it in such a way that it may have allowed the evolution of more complex forms of life.
Answer:
Cyanobacteria are blue-green algae that produce chlorophyll and undergo photosynthesis. Oxygen, a byproduct of that photosynthesis, was released into the atmosphere, changing it in such a way that it may have allowed the evolution of more complex forms of life.
Explanation:
Right on ED2021 practice, goodluck!
How is food digested inside me ?
Answer:
After you swallow, peristalsis pushes the food down your esophagus into your stomach. Stomach. Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices.
why should we conserve ecosystem?
Answer:
Healthy ecosystems clean our water, purify our air, maintain our soil, regulate the climate, recycle nutrients and provide us with food.
WHAT IS The 2nd phase of mitosis
Answer:
When prophase is complete, the cell enters prometaphase — the second stage of mitosis. During prometaphase, phosphorylation of nuclear lamins by M-CDK causes the nuclear membrane to break down into numerous small vesicles. As a result, the spindle microtubules now have direct access to the genetic material of the cell.
Explanation:
Which of the following is true about removing vegetation around a body of water?
A)
It creates a channel for pollution to flow into the body of water.
B)
It causes a decrease in bank erosion.
C)
It decreases sedimentation.
D)
It increases a source of shelter and food for some species of wildlife.
E)
It reduces the shoreline.
Answer:
its a
Explanation:
i took the quiz on it for edge 2020!!!!!!1