Answer:
Scientists called geochronologists are experts in dating rocks and fossils, and can often date fossils younger than around 50,000 years old using radiocarbon dating. This method has been used to provide dates for all kinds of interesting material like cave rock art and fossilized poop
In the conifer forest just below the alpine zone of a mountain top, two closely related species of birds that feed on small flying insects have been living together for millions of years. A local naturalist notices that the beak sizes differ on the two birds. The species that eats mosquitoes has a small delicate beak, and the species that eats robber flies (bigger than mosquitoes) has a very large beak. By accident, the naturalist stumbles upon a fossilized bird on the mountain that looks like it could be the ancestor of both species except its beak is neither small nor large, but intermediate in size. What principle could be at work in shaping the beaks of these birds? a. competition b. ecological niche development c. coevolution d. character displacement e. all of the above
Answer: d. character displacement
Explanation:
Character Displacement this is an evolutionary divergence which usually occurs when two similar species inhabit the same environment. This circumstance occurs where differences among similar species whose circulation in an environment overlap geographically are feature in regions where the species co-occur, but tend to be minimized or lost where the species' circulations do not overlap. Which is same case as that of the birds.
DDT was hazardous because it:
A. decomposed too quickly
B. killed everything it was sprayed on
C. increased the amount of bacteria in soil
D. was carried all over the world by wind
Answer: B.) Killed everything that it was sprayed on.
Explanation: according to my assignment "DDT killed everything... eventually people noticed that fish, birds, and land animals died in areas that had been sprayed."
Hope this helped <3
How long does it take for Earth to make one rotation on its axis? A. 1 day B. 1 month C. 1 hour D. 1 year
Answer- A
Explain- Because in order for the Earth to completly turn around, it takes around 23.8 hrs, which is about 1 day.
Answer:
A. 1 day
Explanation:
It only takes 23 hours, 56 minutes and 4.0916 seconds for the Earth to turn once its axis.
Why are stems considered to have a small role in photosynthesis while roots are not?
Roots are the main source of absorption and make the plant survive. Both the stem and roots. Xylem is founded in both stem and roots.
Identify the remaining processes and components of the carbon cycle. organisms release CO2 atmospheric CO2 plants use CO2 combustion fossil fuels form
Answer:
Carbon dioxide (CO2) is an important component in atmosphere and Carbon cycles allows movement of carbon dioxide from the atmosphere into living things and from living things to atmosphere again.
There are four main processes included in carbon cycle that is photosynthesis, decomposition, respiration and combustion.
In respiration, living organism such as animals and humans intake oxygen and releases CO2 in atmosphere.
In the process of photosynthesis, plants take CO2 from atmosphere and convert it into oxygen (O2) in the presence of sunlight and water.
In Decompoition, the bacteria present in soil decomposes dead matter by breaking down into simpler organic or inorganic matter such as water, carbon dioxide, and mineral salt. The nutrient cycle then recycle the carbon dioxide and send back to teh atmosphere.
In combustion, the burning of fossil fuel in cars and industries releases carbon dioxide back into the atmosphere.
So, the components of carbon cycel include atmosphere, terrestial biosphere, ocean ( dissolved inorganic carbon), and sediments ( fossil fuels).
.
Answer:
Here's what I got for this one
Explanation:
Hope it helps!
Do you think that climate change has been presented to you as doom and gloom throughout your life? Explain.
How is electricity generated in the simulation?
Answer:
(LONG RESPONSE!)
In this work, several simulations and analyses are carried out to investigate the feasibility of generating electricity from underwater sea currents at Istanbul Bosphorus Strait. Bosphorus is a natural canal which forms a border between Europe and Asia by connecting Black Sea and Marmara Sea. The differences in elevation and salinity ratios between these two seas cause strong marine currents. Depending on the morphology of the canal the speed of the flow varies and at some specific locations the energy intensity reaches to sufficient levels where electricity generation by marine current turbines becomes economically feasible.
In this study, several simulations are performed for a 10 MW marine turbine farm/cluster whose location is selected by taking into account several factors such as the canal morphology, current speed and passage of vessels. 360 different simulations are performed for 15 different virtual sea states. Similarly, 8 different configurations are analyzed in order to find the optimum spacing between the turbines. Considering the spatial variations in the current speed within the selected region, the analyses are performed for three different flow speeds corresponding to ±10% change in the average value. For each simulation the annual energy yield and cluster efficiency are calculated.
Which of the following would not be found in a prokaryotic cell?
Answer:
C) mitochondria.
Explanation:
All prokaryotic cells do not have membrane-bound organelles. In the case of mitochondria, however, it has a double membrane. It itself was originally a prokaryotic cell, but it evolved into an organelle.
A: Prokaryotic cells do glycolysis in which a net of 2 ATP's are produced, 2 NADHs are yielded, as well as 2 pyruvate.
B: Ribosomes are not membrane-bound and thus found in prokaryotse.
C: N/A.
D: Cytosol is most definitely found in prokaryotes; it's the jelly-like fluid that surrounds the organelles inside the cells.
E: Yes, prokaryotic cells have plasma membranes.
Materials such as minerals, soil, fuels, and clean water are called
O natural resources
bio-elements
O habitats
O non of the above
Answer: natural resources
Explanation:
Why are leaves of water lily coated with wax on the upper surface?
Answer:
The wax creates an outer layer of zero friction surface helping the water lily leaves float on the water surface, the wax also creates a shiny coating that reflects and lowers the temperature of the water and also prevents water loss by evaporation and helps in prevention of other plant diseases.
Explanation:
Why element of the xylem in vascular bundle is less than the phloem?
Answer:
The element of the xylem in vascular bundle is less than the phloem because the Xylem carries water which is a raw material to manufacture the food.
Explanation:
A pair of xylem and phloem is termed to be a 'vascular bundle'.
The purpose of the Xylem tissue is to transport the water from the roots to the stems and leaves. Other compounds are also transported which are dissolved in the water. Phloem, on the other hand, helps in transporting food from leaves to other parts of the plant.
As a scientist working for an anti-bioterrorism task force, you are asked to evaluate some biological samples for the presence of Yersinia pestis, the organism that causes the plague. After confirming that the samples do contain Y. pestis, you instruct your team to begin sequencing the strain. Since the genome sequence of Y. pestis is already known, why would sequencing this strain be useful?
Answer:
To gather relevant knowledge about their origin and to determine if the strain has been genetically modified.
Explanation:
A researcher researching with the anti-bioterrorism working group, they are required to assess certain blood specimens only for existence of Yersinia pestis, the organisms which causes the disease.
Since verifying that perhaps the varieties showed Y. Pestis, they are instructing their group to start sequence alignment the strains. So, this is to collect specific knowledge about their origin and to assess if the strain has also been genetically modified.
If all of the red squirrels were diseased and died off what would happen to this food web?
To support the ecosystem in the previous question, botanical gardens are propagating these trees for sale. Although seeds have been collected, the commercially available plants are from cuttings and tissue culture. Based on the life cycle of conifers, why is it not practical to reproduce Wollemi pines from seed or even to sell the seeds?
Answer:
A tree that possesses scale or needle-like leaves and cones that remains green throughout the year is known as a conifer. Some of the examples of conifers are cedars, junipers, redwoods, pines, etc. These trees have great economic importance as they are the prime sources of turpentine and resins, and are also a great source of softwood.
It is not practical to cultivate the Wollemi pines from their seeds, as the majority of the seeds that fall from the cones of Wollemi are not viable, and their cultivation may even consume many months. The species mentioned is also considered as endangered, therefore, it will not be feasible to cultivate them via the help of seeds.
Why do birds have no urinary bladders?
1 pts
Question 6
Talia and Amanda live across the street from each other and they walk to school together every morning. The school is about 3 blocles away
Time
Analyze the graph above and choose the statement below that is a possible interpretation of the section of the graph from point B to c?
They reached the top of a hill and began accelerating
They slowed down their walk and met up with friends
They returned home to get their mathematics book
They waited before crossing a busy street
1 pts
Question 7
CHE
D
Answer:
They waited before crossing a busy street
Explanation:
Assume the graph looks like the one below.
It shows that, from Point B to C, the distance they were from home did not change. They had stopped.
A possible interpretation is that they waited before crossing a busy street.
If they had begun accelerating, BC would have been steeper than AB.
If they had slowed their walk, BC would still point up. However, its slope would be less than that of AB.
If they had returned home, BC would point down and to the right.
ANSWER THIS PLEASE I NEED HELP AND I ALSO NEED HELP ON MORE ANSWERS PLEASE HELP ME ASAP IM USING MY LAST POINTS FOR THIS!!!
Answer:
its a
Explanation:
they r the same thing
If a person with AB blood (genotype IAIB) produced an offspring with a person who’s IAi, what’s the chance that the offspring will have A blood? Give your answer as a percentage. Use the table to make a Punnett square to show your work. Can you show me in a chart to break it down to get that answer which is 50%.
Answer:
50% of getting A blood type
Explanation:
Using a punnet square you have (sorry cant do a square)
IA IB
IA
i
Then you you add all the possible combinations from both parents genes
IA IB
IA IA IA IA IB
i IA i IB i
You now have a 50% chance of A type blood because the lowercase (i) wont change the blood type outcome because the IA over shines it.
Answer: 50 percent
Explanation:
IA IB
IA IAIA IAIB
i IAi IBi
Which of the following are features of nucleosomes? A nucleosome contains approximately 20 base pairs of DNA. The DNA in a nucleosome is wound around eight histone proteins. Between nucleosomes is a stretch of DNA called "linker DNA". A nucleosome contains 8 different types of histones. In a nucleosome, DNA is wrapped 4 times around the histone core. H1 seals off where DNA enters and leaves the nucleosome. Nucleosomes contribute to DNA packing. Nucleosomes in chromatin are arranged in straight, side-by-side chains. Nucleosomes are about 10000 Angstroms in diameter. Histones have tails that stick out and can be modified, affecting DNA expression.
Answer:
The correct answers are "The DNA in a nucleosome is wound around eight histone proteins", "Between nucleosomes is a stretch of DNA called "linker DNA", "H1 seals off where DNA enters and leaves the nucleosome", "Nucleosomes contribute to DNA packing", and "Histones have tails that stick out and can be modified, affecting DNA expression".
Explanation:
Nucleosomes are comprised of DNA and histones that in conjunction form structural units of the chromosomes. The DNA in a nucleosome is wound around eight histone proteins, which are known as the histone octamer. Between nucleosomes is a stretch of DNA called "linker DNA", which is an unwrapped DNA that can be between 10 to 50 base pairs long. H1, one of the four types of histone, seals off where DNA enters and leaves the nucleosome serving as an anchor to the complex. Nucleosomes contribute to DNA packing by wrapping the DNA and forming the structural units of the chromosomes. Histones have tails that stick out and can be modified, affecting DNA expression; which are known as "histone tails" located in the N-terminal side and where higher order structures are arranged.
In this discussion, you will justify the dependence of life on the sun and the interdependence of living things and their chemistry. People who do not understand the relationships between biological processes on the planet may roll their eyes at the statement, "Life on this planet is a delicate balance." What evidence have you found in this course so far to support this statement
Answer : Yes they can I will attach pic
Explanation:
NEED THIS ASAPPPPP
What role does the ocean plays in climate change ?
Answer:
erosion can shape the land , for example the Grand Canyon
Consumers differ from producers in that unlike producers, consumers ___________.
a.
do not require energy inputs
b.
cannot make their own food
c.
make their own food
d.
cannot sense and respond to change
e.
do not pass DNA to offspring
Answer:
Consumers differ from producers in that unlike producers, consumers cannot make their own food.
Explanation:
Producers like plants make their own food not consumers like humans.
hope it helps!
Consumers differ from producers in that unlike producers, consumers .b. cannot make their own food.
Producers can make their own food and energy, but consumers are different. Living things that have to hunt, gather and eat their food are called consumers. Consumers have to eat to gain energy or they will die. There are four types of consumers:
omnivores, carnivores, herbivoresdecomposers.How do consumers differ from producers?The producers generate food for themselves and others; consumers do not produce anything, instead eating producers, other consumers or both. Organisms that eat only producers (i.e., plants) are called herbivores. Animals that eat only consumers (i.e., meat) are called carnivores.
To learn more about Consumers and producers, refer
https://brainly.com/question/18670716
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Identify one process that causes clouds to form in the moist air rising along the frontal boundaries of the low-pressure system.
Answer and Explanation:
The fronts are imaginary lines that separate two air masses of different temperatures. It takes too long for these two masses to mix, causing numerous atmospheric phenomena.
A hot air mass meets a cold air mass. The cold air is heavier and takes a wedge shape under the hot air that rises following a kind of ramp that constitutes the front line.
In the contact area, the hot air cools to the point of condensation and forms clouds that cause precipitation. These warm fronts originate weak but continuous rains.
Plants also have organs that are made up of different tissues working together. Which is an example of a plant organ?
Select one or more:
a. leaf
b. shoot system
c. chlorophyll
d. root system
Answer:
b. shoot system
Explanation:
the shoot system connects all the different parts of the plant (leaves, stem, roots) and helps move the water and minerals throughout the plant. Hope this helps and is right, I'm pretty sure it is but I could be wrong :)
3 things that Euglena gracilis do for the environment?
Answer:
Explanation:phlagellum... i have to have 20 characters for a simple answer, so im just typing i can actually submit my answer
which of the following words best matches this definition: The process in which the best adapted organisms survive and pass on their traits, while those that are NOT well adapted do not survive.
Answer:
Survival of the fittest
Explanation:
According to the Darwin’s theory of survival, a species can survive among its peers only when it is fit enough to adapt to the natural changes and hence remain alive till its reproductive stage in order to produce fertile offspring.
Such species which survive are known as fit species while the remaining unable to cope with changing environment die out at an early stage of life.
What is the comparison and the differences between the structures of the stomach and the pancreas?
Answer:
Explanation:
The chyme produced from the stomach is highly acidic in nature; the pancreatic juices contain high levels of bicarbonate, an alkali that neutralizes the acidic chyme. Additionally, the pancreatic juices contain a large variety of enzymes that are required for the digestion of protein and carbohydrates.
50 POINTS!!! Quick Help!!!! Which is an example of an instinct?
A. A rabbit hides when it observes a predator.
B. A dog wags its tail when it hears a doorbell ring.
C. A boy pulls his hand away after touching a hot surface.
D. A dolphin swims through a hoop during an amusement park show.
Answer:
A-
A rabbit hides when it observes a predator.
Explanation:
IT IZZ WHAT IT IZZZZAfter the protein has fallen off the operon, the ____________ can then transcribe the DNA into mRNA.
Answer:
The genetic material of most organisms is DNA, which stores the information required for the development, functioning, and reproduction of the organism. DNA is a long piece of nucleotides where both coding and non-coding regions can be identified within the nucleotide sequence. The coding regions contain the information for the production of functional proteins in the organisms. The process of production of the polypeptide chain of the protein inside the cell is known as protein synthesis. Transcription of DNA into mRNA and translation of mRNA into an amino acid sequence of the protein are the sequential steps of the protein synthesis.
Explanation:
based on the scientists results, which of the following is true?
