a dichotomous key for trees is provided. hikers found a tree that has large brown cones and single sharp needles. what species of tree have the hikers found?a.Juniperb.Pinec.Spruced.Fir
Answers
Hikers found a tree that has large brown cones and single sharp needles. It means they have found Pine tree. So, option B is correct.
Pine trees are evergreen coniferous trees in the genus Pinus, which is part of the family Pinaceae. They are characterized by long needles that are bundled together in clusters, and by the presence of pine cones, which house the tree's seeds. Pine trees are found all over the world, from the Arctic to the tropics, and they are an important source of timber, paper, and resin. They also play a crucial role in many ecosystems, providing food and habitat for a wide range of animals.
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Related Questions
As depth increases in the Geosphere, so does_______
Answers
Answer:
temperature and pressure
Explanation:
i had a quiz on it
Answer:
Temperature and Pressure
Explanation:
:)
In a bacterial infection of the periodontium, the cells that arrive to the infection site first (the rapid responders) are the:
a. Polymorphonuclear leukocytes (PMNs).
b. Macrophages.
c. Monocytes.
d. T-lymphocytes.
Answers
The cells that arrive at the infection site first in a bacterial infection of the periodontium are the polymorphonuclear leukocytes (PMNs).
In a bacterial infection of the periodontium, the cells that arrive at the infection site first are the polymorphonuclear leukocytes (PMNs).
PMNs, also known as neutrophils, are a type of white blood cell and are part of the innate immune response.
They are the most abundant type of white blood cells and play a crucial role in the initial defense against bacterial infections.
PMNs are rapidly recruited to the site of infection through a process called chemotaxis, which is the movement of cells towards a chemical signal.
Once at the site of infection, PMNs engulf and destroy bacteria through a process called phagocytosis.
They release antimicrobial substances and enzymes to kill and break down the bacteria.
The rapid response of PMNs is vital in containing the infection and preventing its spread to other tissues.
They act as the first line of defense and play a crucial role in the early stages of bacterial infection.
Their quick arrival and effective response help to limit the damage caused by the infection and initiate the subsequent immune response.
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Hot water deep within Earth can ____________ minerals and transport them someplace else.( I’ll give brainliast)
Answers
Answer:
Hot-Water Solutions Groundwater works its way down and is heated by magma, and then reacts with minerals to form a hot liquid solution. H. Dissolved metals and other elements crystallize out of the hot fluid to form new minerals, such as gold, copper, sulfur, pyrite, and galena.
Explanation:
umm hope this helps...
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─▄▄──█░░░░░░░░░░░█──▄▄
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During photosynthesis, carbon dioxide and water, in the presence of light,
are used to form sugar (glucose) and oxygen gas
true or false
Answers
17
Describe how temperatures above 35 °C most likely affect the structure
and function (be specific!) of starch synthase in the particular strain.
Answers
The chemical reaction equation of photosyntesis is shown here:
6CO₂+6H₂O→C₆H₁₂O₆
What information is not given in this equation.
Answers
Answer:
The 6O2 is left out.
Explanation:
The reactants has 18 oxygens but the products only has 6 oxygens. Adding 6O2 would get us to 18 oxygens on both sides.
This is not part of the equation, but energy could be considered as well.
When viewing the histology of blood capillaries, in comparison to lymph capillaries, blood capillaries have all of the following, except that they have no basement membrane O are larger in diameter o have walls of endothelial cells that overlap like shingles O are smaller in diameter.
Answers
When comparing the histology of blood capillaries to lymph capillaries, blood capillaries have all of the following features, except that they have no basement membrane. The correct option is (a).
When viewing the histology of blood capillaries in comparison to lymph capillaries, blood capillaries have all of the following characteristics: they have walls of endothelial cells that overlap like shingles, they are smaller in diameter, and they are not larger in diameter than lymph capillaries. However, blood capillaries do not lack a basement membrane, unlike lymph capillaries.
The basement membrane is a thin layer of the extracellular matrix that underlies and supports the endothelial cells in both blood and lymphatic capillaries. It is an essential component of capillary structure and function, providing structural support and regulating the movement of molecules and cells into and out of the capillary lumen.
While blood capillaries have a basement membrane, lymph capillaries lack one, which allows for easier entry of cells and fluid.
In contrast to lymph capillaries, blood capillaries have smaller diameters and walls of overlapping endothelial cells that form a continuous, tightly packed barrier. This arrangement allows for the efficient exchange of gases, nutrients, and waste products between the blood and surrounding tissues.
The smaller diameter of blood capillaries also helps to regulate blood flow and pressure, which is critical for maintaining proper tissue perfusion and preventing damage to blood vessels.
In summary, while blood capillaries and lymph capillaries share many similarities in terms of their histology and function, one key difference is that blood capillaries have a basement membrane, while lymph capillaries do not.
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DNA that contains information from two different species is knows as
Answers
DNA (or deoxyribonucleic acid) is the molecule that carries the genetic information in all cellular forms of life and some viruses. It belongs to a class of molecules called the nucleic acids, which are polynucleotides - that is, long chains of nucleotides.
What are the major differences between unicellular and multicellular organisms?
Answers
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function.
Movement of substances is regulated because membranes are (___) permable
Answers
Answer:
Partially / semi permeable
Explanation:
Only certain substances can move in cells thus membranes are permeable partially.
What is the difference between national legislation and international treaties
Answers
Answer:
The main difference between international and national law is that international law regulates external relations between two or more countries by the signing of treaties and agreements concerning trade, war, the sea or oil, whilst national law or domestic law is applied within the boundaries of a country
2. DNA evidence
A. can solve evolutionary puzzles, such as how to classify organisms that look similar to one species but share
peculiar behaviors with another.
B. is not as reliable as physical characteristics or behaviors when used to classify organisms and determine
evolutionary relationships.
C.has not resulted in any changes to cladograms that were created using observable traits or behaviors.
D.can be used to classify organisms that are very different from each other, but not organisms that have close
evolutionary relationships.
Answers
DNA evidence can provide answers to evolutionary conundrums, such as how to categorize organisms that resemble one species but behave strangely compared to that species.
The correct option is A.
What is the role of DNA evidence in evolution?DNA evidence plays a crucial role in understanding evolution, as it allows us to trace the history of genetic changes that have occurred in populations over time. By comparing the DNA sequences of different species, we can reconstruct the evolutionary relationships between them, and trace the origin and diversification of different traits.
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What is biodiversity? Please explain. I’ll give literally anyone branliest...I NEED HELP ASAP!
Answers
Answer: Biodiversity is the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem levels. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity.
Explanation:
Answer:
The variety of life in the world or in a particular habitat or ecosystem. (It is a noun).
Explanation:
"A protein is 300 amino acids long. Which of the following could be the number of nucleotides in the section of DNA that codes for this protein? (Remember: DNA is double-stranded.)"
The correct answer is 1800.
I thought that each single DNA strand coded for different proteins and the other complementary strand coded for a different protein since each would result in different amino acids during translation. so therefore I originally thought the answer might be 900? Can someone help explain this for me?
Answers
Each single DNA strand codes for a specific protein, and the complementary strand has a different sequence that may code for a different protein.
To determine the number of nucleotides in the section of DNA that codes for a specific protein, we need to consider that the genetic code is read in sets of three nucleotides called codons. Each codon codes for a specific amino acid.
Therefore, to calculate the number of nucleotides, we need to multiply the number of amino acids by three (since each amino acid is coded by three nucleotides).
In this case, the protein is 300 amino acids long. Multiplying 300 by three gives us 900 nucleotides. However, it is important to note that DNA is double-stranded, and the coding strand and the complementary strand have opposite orientations. So, the number of nucleotides in the coding region of the DNA would be twice that of the single-stranded DNA.
Hence, the correct answer should be 1800 nucleotides, not 900, as each strand of the DNA molecule contributes to the coding sequence.
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Which statement describes an advantage of asexual reproduction?
A: Asexual reproduction results in variations in DNA.
B: Asexual reproduction causes less competition for resources.
C: Asexual reproduction is faster than sexual reproduction.
D: Asexual reproduction requires more energy than sexual reproduction.
Answers
Answer:
C: Asexual reproduction is faster than sexual reproduction.Explanation:
This is a benefit of asexual reproduction since it enables organisms to reproduce and give birth to young swiftly without the need to choose a partner or go through a laborious mating process. Their chances of surviving and thriving in their surroundings may rise as a result.
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Please help
Fill in the blank
Relate the law of conservation of mass to photosynthesis
The Law of Conservation of Mass holds true in photosynthesis
because the number of ______________
Answers
Answer:
individual atoms that compose living organisms have long histories as they cycle through the biosphere.
What are the two examples of keratin and enzymes
Answers
Answer:
I know that keratin is found in the protein of hair, nails, horn, hoofs, wool, feathers, etc.
Explanation:
when nutrients are suboptimal for cell growth and division, the cell cycle arrests. at which stage of the cell cycle/checkpoint would you predict this arrest to occur?
Answers
The cell cycle stops when nutrients are insufficient for cell growth and division. We would anticipate that this arrest would take place at the G1 checkpoint stage of the cell cycle. Option (A) is correct.
The cell physically expands when in the G1 phase and produces more organelles and protein. The cell replicates its nucleosomes and copies its DNA to create two sister chromatids during the S phase. Finally, the G2 phase involves continued cell development and cellular content organization. The G2 phase is a time of accelerated protein synthesis and cell expansion when the cell gets ready for mitosis.
Strangely, some cell types—most notably immature Xenopus embryos and some cancers—move straight from DNA replication to mitosis without going through the G2 phase of the cell cycle. The cell will halt at the G2 start subscript, 2, end subscript checkpoint to allow for repairs if errors or damage are found. The cell cycle is stopped if the checkpoint mechanisms identify DNA abnormalities, and the cell then tries to either finish DNA replication or repair the damaged DNA.
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Correct Question:
When nutrients are suboptimal for cell growth and division the cell cycle arrests. At which stage of the cell cycle/checkpoint would you predict this arrest to occur?
A) G1 checkpoint
B) G2 checkpoint
C) M checkpoint
D) G1, G2 and M checkpoints
E) The cell cycle would not arrest
what is a flat representation of the earth's surface
Answers
Afish swims through industrial pollution and acquires a thin layer of magneslum fluoride on its scales approximately 0.5 jum thick. Deep sea creatures are very sensitive to blue light (455 nm), but have trouble seeing other wavelengths. Will other deep sea creatures be able to see the fish? (Note: Use π _fukseace is very large, π _magnaisar fileride =1.38, and n_water =1.333.)
Answers
To determine if other deep-sea creatures will be able to see the fish with its thin layer of magnesium fluoride, we need to consider the phenomenon of thin-film interference.
In this case, the fish has a thin layer of magnesium fluoride on its scales, which acts as a thin film. The thickness of the film is given as 0.5 μm (micrometers). The refractive index of magnesium fluoride is 1.38.
To determine if the fish will be visible to deep-sea creatures, we need to check if there is constructive interference for the blue light wavelength of 455 nm (nanometers). The condition for constructive interference is given by the equation:\(2 * n * d * cos(θ) = m * λ\)Where: n is the refractive index of the medium above the film (air or water), d is the thickness of the film, θ is the angle of incidence, m is the order of the interference (m = 0, 1, 2, ...), and λ is the wavelength of light.Assuming the incident angle is zero degrees (normal incidence) and using the given values, we can calculate the mth order of interference for the blue light wavelength.
\(2 * 1.333 * 0.5 = m * 455 nm\)
\(1.333= m * 0.455 μm\)
\(m=2.93\)
Since m is not an integer value, there is no constructive interference for the blue light wavelength.
Therefore, it is likely that other deep-sea creatures will not be able to see the fish due to the limited visibility of wavelengths other than blue light in their environment.
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the explanation for the difference in physiological effects is that the japanese man was missing the normal mitochondrial aldehyde dehydrogenase and had only a cytosolic isozyme. the cytosolic isozyme is
Answers
The cytosolic isozyme is a variant or form of the enzyme called aldehyde dehydrogenase.
What is the term used to describe the specific form or variant of the enzyme aldehyde dehydrogenase?The Japanese man in question had a cytosolic isozyme of aldehyde dehydrogenase, which means that he had a specific variant or form of the enzyme in his cells.
This variant of aldehyde dehydrogenase was present in the cytosol, the liquid component of the cell, rather than in the mitochondria, which is where the normal mitochondrial aldehyde dehydrogenase is typically located.
The difference in physiological effects observed between individuals with the normal mitochondrial aldehyde dehydrogenase and those with the cytosolic isozyme can be attributed to the functional variations and properties of these different forms of the enzyme.
The cytosolic isozyme may have different substrate specificity, activity levels, or other characteristics that contribute to distinct physiological effects when metabolizing aldehydes or other substances in the cell.
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Which of the answers would be Matter?
Group of answer choices
rainbow
the sun
electricity
heat
Answers
Animals that are extinct can come back from extinction.
True
False
Answers
Answer:
True
Explanation:
This is true, because extinction happens when the number of individuals of a certain species becomes zero. An extinction species cannot ever return; extinction is forever.
(I had gotten this right on my quiz.)
during which process is chromosome number reduced?
Answers
Answer:
number of chromosmes are reduced at anaphase.
Explanation:
At anaphase of cell division, chromosomes that are aligned on the metaplate are pulled apart by kinetchore microtubules connected at the centromere of each chromosome reducing the number of chromosomes by half.
3 parts of the cell theory
Answers
Answer:
The first part states that all organisms are made of cells. The second part states that cells are the basic units of life. These parts were based on a conclusion made by Schwann and Matthias Schleiden in 1838, after comparing their observations of plant and animal cells. The third part, which asserts that cells come from preexisting cells that have multiplied, was described by Rudolf Virchow in 1858, when he stated omnis cellula e cellula (all cells come from cells).
Explanation:
Chemical mechanisms that can turn off or reduce an enzyme are _____.
a.) inhibitors
b.) activators
c.) centrioles
d.) vacuoles
Answers
Answer:
Explanation:
Chemical mechanisms that can turn off or reduce an enzyme are inhibitors. Explanation; -Enzyme inhibitors are molecules or compounds that bind to enzymes and result in a decrease in their activity. They can bind to an enzyme and stop a substrate from entering the enzyme's active site and/or prevent the enzyme from catalyzing a chemical reaction.
Answer:
Inhibitors
Explanation:
They inhibit enzymatic activity.
What does ambulocetus translate to?
Answers
Ambulocetus (meaning "walking whale") is an early cetacean with short limbs and large feet used for swimming. Along with other members of Ambulocetidae, it is a transitional fossil that shows how whales evolved from land-living mammals.
Answer:
Walking whale that swims
Explanation:
its a cetacean with short limbs and large feet used for swimming
The cell cycle can be divided into two broad stages:
The non-dividing portion, called _________________________
The cell division portion called ______________ & ________________
Answers
Answer:
The non-dividing portion is called Interphase.The Cell division portion is called Mitosis and cytokinesis
Explanation:
Answer:
chemical signals from cylins
Explanation:
Symbiotic archaea that live inside tubeworms can use two different methods to metabolize ________ and can switch back and forth to accommodate fast-changing environmental conditions.
A) arsenic
B) cadmium
C) carbon dioxide
D) hydrogen sulfide
E) sulfuric acid
Answers
Symbiotic archaea that live inside tubeworms can use two different methods to metabolize hydrogen sulfide and can switch back and forth to accommodate fast-changing environmental conditions.
Symbiotic archaea that live inside tubeworms (specifically, deep-sea tubeworms) are known as sulfur-oxidizing bacteria. These bacteria have the ability to metabolize hydrogen sulfide, which is abundant in the deep-sea hydrothermal vent environments where the tubeworms reside. Hydrogen sulfide serves as an energy source for these bacteria, allowing them to generate the necessary nutrients for their survival.
The hydrothermal vent environments are highly dynamic, with fluctuating levels of hydrogen sulfide due to the venting of volcanic gases. To adapt to these fast-changing environmental conditions, the symbiotic archaea can switch between two different methods of metabolizing hydrogen sulfide. They can either use the sulfide oxidation pathway or the sulfur oxidation pathway, depending on the availability of hydrogen sulfide and other factors in their immediate environment.
This metabolic flexibility enables the symbiotic archaea to efficiently utilize the available resources and survive in the extreme and ever-changing conditions of deep-sea hydrothermal vents.
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6. Using the diagram to the right, what happens during the
third step of DNA replication? Help pls ! <3
Answers
DNA polymerase III binds to the strand at the site of the primer and begins adding new base pairs complementary to the strand during replication.
What happens during the third step of DNA replication?DNA unkinks at the origin of replication. DNA replication occurs during the S phase of cell division. In E. coli, this way that the entire genome is replicated in just 40 minutes, new DNA nucleotides are put in the spot of the primers and the backbone is sealed by DNA ligase.
Replication occurs in three major steps: the space of the double helix and separation of the DNA strands, the preparation of the template strand, and the gathering of the new DNA segment. During separation, the two shores of the DNA double helix uncoil at a fixed location called the origin.
So we can conclude that DNA replication is an essential procedure and the basic mechanism is maintained in all organisms.
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