Answer:A. 6.3 ong
Explanation:
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Which of the following features of the alveolar sacs allows for the ease of diffusion of gasses?
a. They are made of a single layer of simple squamous epithelium.
b. Type II alveolar cells secrete surfactant.
c. Elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.
d. They are made of a single layer of simple squamous epithelium and elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.
The alveoli can stretch thinly enough to allow for diffusion thanks to elastin fibers. The alveolar sacs' unique characteristics make it possible for gases to diffuse easily.
Describe elastin fibers.Elastic fibers are crucial macromolecules of the extracellular matrix, consisting of an elastin core encircled by a mantle containing fibrillin-rich microfibrils. They give vital characteristics like elasticity and durability to connective tissues including blood vessels, lungs, and skin.
Where can you find elastin fibers?The both fibrous perichondria comprising hyaline and fiber cartilages as well as the joint fibrous tissue in diverse joints include elastic fibers. Elastic fibers are present in bones' exterior fibrous periosteum layer but not in the inside cellular (cambial) layer.
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How can vegetarians make sure they get enough protein?
Vegetarians make sure they get enough protein by adding Beans and lentils ,Soy products ,Whole grains, Nuts and seeds in their daily meals .
Protein is one of the most essential nutrients for daily life , as they are required to help your body repair cells and make new ones. Protein also plays crucial role in growth and development in children and expecting mothers .
In general , proteins are required for the repairing and building your body's tissues, They also allows metabolic reactions to occurs at place for easy body function . so we can say that protein is crucial for maintaining structural framework of body and also helps in maintaining fluid balance .
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need help asap
question 5
- 20 points
Answer: false, 2 means 2 births per woman
Explanation:
One example of an oncogene is ras. Ras is a G protein that is activated when growth factors bind to a G protein-coupled receptor. The mutated form of ras binds to GTP but does not allow the GTP to be broken down to GDP. Ras is involved in both the G 1 and G 2 checkpoints. What happens to cells that have this mutated form of ras
Ras is involved in both the G1 and G2 checkpoints.Through the inhibition of cyclin-dependent kinase inhibitors (CKIs), such as p27 and p21, which would otherwise bind with and inhibit cyclin-dependent kinases, oncogenic RAS can enhance cell cycle advancement (CDKs). IgM).
Growth factors bind to cell surface receptors to promote cellular proliferation and/or differentiation.While some growth factors are unique to a particular cell type, others are highly adaptable and stimulate cellular division in a variety of oncogenic cell types. When growth factors attach to growth factor receptors, normal Ras is activated. Ras becomes GTP-bound when it is inhibitors, activating a signalling pathway that promotes cell division and proliferation.
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Which living thing is a typical marsh inhabitant? O A. Sea star O B. Octopus O C. Alligator O D. Peat
Option C is Correct. Alligator marsh is a kind of wetland where herbaceous plants thrive.
These can be discovered close to the shores of lakes or any other body of water. A marsh is a zone where the aquatic and terrestrial ecosystems meet. Rushes, reeds, and grasses are the predominant flora in wetlands.
Alligators are a type of amphibian that is related to crocodiles. These inhabit freshwater and brackish environments. These amphibians complete their life cycle in environments on land and in water. They favor environments like marshes, lakes, swamps, ponds, and rivers as their home. Alligators may survive in the marsh ecosystem thanks to the muddy terrestrial habitat and freshwater.
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What is Mendel's second conclusion?
Mendel's second law, also known as the Law of Segregation, states that during the formation of gametes, two copies of each gene (alleles) separate from each other and are passed on to different gametes independently of one another.
This means that for each inherited trait, an organism receives one allele from each parent, and the allele that is expressed (determines the phenotype) is determined by its dominance. This means that the dominant allele will mask the effect of the recessive allele. This law explains the phenomenon of Mendel's first law, the law of dominance, which states that certain traits are dominant over others. Mendel's second law also explains the phenomenon of Mendel's third law, the law of independent assortment, which states that the inheritance of one trait is independent of the inheritance of another trait.
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Some seeds are light and can easily be carried long distances by the wind. Some seeds have barbs that cause them to attach to the fur of animals. Some seeds are enclosed in fruit that is eaten by birds. What do these features of seeds all have in common?
A.
They all provide nourishment to the seed.
B.
They all help the seed survive winter.
C.
They all allow for seed dispersal.
D.
They all protect the seed from injury.
These features of seeds all have in common for They all allow for seed dispersal.
What is seed dispersal?Seed dispersal is the mechanism by which plant seeds are transported to new sites for germination and the establishment of new individuals. Animals commonly mediate this process, and consequently, the ultimate fate of seeds depends on their effectiveness as seed dispersersDispersal can be defined as the process by which individuals move from the immediate environment of their parents to establish in an area more or less distant from them.Dispersal is the spreading of things over a wide area. Plants have different mechanisms of dispersal for their spores. Synonyms: scattering, spread, distribution, dissemination More Synonyms of dispersalDispersal of seeds is very important for the survival of plant species. If plants grow too closely together, they have to compete for light, water and nutrients from the soil. Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources
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Which statement describes a cell part needed by the cell to make proteins?
A.
Cell membranes contain phospholipids.
B.
Vacuoles contain water.
C.
The nucleus contains DNA.
D.
Chloroplasts contain chlorophyll.
Answer:
C.
The nucleus contains DNA.
What are examples of environmental influences?
The examples of environmental influences
chemical pollutionair pollutionclimate changedisease-causing microbeslack of access to health carepoor infrastructureand poor water quality.There is speculation that environmental factors can affect behavior both directly and indirectly. The indirect causal mechanism illustrates how cognitions that are specific to a behavior play a mediating role in the influence of the environment on behavior. A direct influence shows how the environment automatically and unconsciously affects behavior.
Certain behavioral and personal characteristics are hypothesized to modify the causal pathway (i.e., inducing either the automatic or the cognitively mediated environment – behavior relation). The EnRG framework also uses an energy balance approach, which encourages an integrated investigation of factors influencing nutrition and exercise.
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Individual that is hybrid For a particular trait contains what ?
An Individual that is a hybrid organism is heterozygous. This means that it carries two different alleles at a particular genetic position or locus.
What defines the trait of an individual?Traits can be defined by genes, environmental factors or a combination of both. Traits can be qualitative such as eye colour or they can be quantitative such as height or blood pressure. A given trait is part of an individual's overall phenotype. If an organism has one of the same type of allele on each of its chromosomes, that organism has a pure trait. If an organism has two different types of alleles on its chromosomes, that organism has a hybrid trait.
What is the genotype of a hybrid individual?The genotype of the F1 hybrid offspring is Aa or Bb. The hybrid is heterozygous for both active genes. The recessive effects of aa and bb have been completed in the hybrid by the inheritance of one dominant gene.
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Marine Biology Please Answer and Explain
Is Gause’s Principle accurate? Explain why or why not.
Gause’s Principle is accurate because he describes that two species with the same niche cannot exist in the same habitat which is true.
What is a Niche?This is a term which is referred to as a place or position that's particularly appropriate for someone or something, especially due to being very specific and different from others.
Gause’s Principle however states that two species with the same niche cannot exist in the same habitat which is true. This is because their coexistence will lead to a high degree of competition which could lead to a decrease in their survival rate in the ecosystem.
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What is a type of rock contains the most fossils?
A. Metamorphic
B. volcanic
C. Sedimentary
D. Igneous
Answer:
C. Sedimentary
Explanation:
Answer:
C. Sedimentary
Explanation:
Almost all fossils are preserved in sedimentary rock.
Name structure B in figure 16-1
What is the name of those mutations that do not cause harm to the organism
Which of the following is the most likely reason that the greatest number of extinctions of bird species occurred in the period 1901-2000
Increased environmental disturbances from human activities and altered bird habitats are the main reason behind the extinction of bird species between 1901-2000.
Between 1901 and 2000, 90 more mammal species went extinct than between 1801 and 1900. Environmental issues caused by human activities have gotten worse Changes in bird habitats between 1901 and 2000 was the main factor in the demise of numerous bird species.
When something is eradicated, it ceases to exist. There could be a lot of reasons for it, such as the extinction of some species as a result of overhunting, a lack of food, or natural disasters.
The mass extinction, which has only occurred five times throughout history, comes first. There are essentially two types of extinction. The second factor is background extinctions, which occur over a longer period of time and have a considerable impact on the pace of natural extinction.
The complete question is:
Which of the following is the most likely reason that the greatest number of extinctions of bird species occurred in the period 1901-2000?
(a). Increased environmental disturbances from human activities altered bird habitats.
(b). Deforestation
(c). Creating wildlife refugees
(d). species richness
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How fast do you administer IV epinephrine in NRP?
It takes as fast as 45–60 seconds to provide the first dose of epinephrine with invasive neonatal resuscitation techniques like intubation or venous access. If the heart rate doesn't rise above 60 beats per minute after the initial dose, epinephrine can be given every 3 to 5 minutes.
Systematic evaluation of human infant and pertinent animal research comparing various epinephrine dosages, delivery methods, and delivery intervals in neonatal resuscitation to the (currently advised) intravenous (IV) administration of doses of 0.01 to 0.03 mg/kg given every 3 to 5 minutes. After being administered, epinephrine immediately starts to work. However, it can take 5–10 minutes for it to take full action.
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Tundra and alpine biomes are both characterized by low temperatures and
few trees. How are these two biomes different?
A. The tundra occurs near the North Pole. The alpine biome occurs
near the South Pole.
B. The tundra is near the tops of mountains. The alpine biome is
near the North Pole.
C. The tundra is near the North Pole. The alpine biome is near the
tops of mountains.
D. The tundra is near the North and South poles. The alpine biome is
along the equator.
!!HELP PLEASE!!
Answer:
it definitely c
Explanation:
because the tundra occurs at near the North Pole it is very cold in the Arctic and it's found in the northern hemisphere while the Alpine is found at the tops of mountains in a more warmer area with trees tundras are more Frozen
What is the importance of mitosis for uni cellular organisms?
In unicellular organisms like bacteria, mitosis aids asexual reproduction by creating a near-exact duplicate of the parent cell.
A "amoeba" is another illustration of a eukaryotic, unicellular creature. An amoeba creates new life through cell division. Cell division in unicellular organisms is required just for reproduction. They divide their cells through a process called mitosis to create their daughter cells. Cell division is crucial for the development of new body cells and reproduction in multicellular animals. One pair of parents are used in asexual reproduction to create genetically identical kids. The primary method of cell division utilised by unicellular organisms is binary fission. The cell divides into two daughter cells that are genetically identical to one another.
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How do mammals compare with birds and reptiles in terms of temperature regulation and structure of the heart?
Answer:
the biggest difference is that mammals are endothermic and internally regulate their body temperature, but reptiles are ectothermic because they rely on the environment to do it for them.
Explanation:
Ectothermic: An ectothermic animal, also commonly known as a "cold-blooded" animal, is one who cannot regulate its own body temperature, so its body temperature fluctuates according to its surroundings. The term ectotherm comes from the Greek ektos, meaning outside, and thermos, which means heat
Endothermic: An endothermic process is any process with an increase in the enthalpy H of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.
Exothermic reactions transfer energy to the surroundings and the temperature of the surroundings increases. Endothermic reactions takes in energy and the temperature of the surroundings decreases.
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What is the process by which plants use energy from sunlight to convert water and carbon dioxide into glucose and oxygen?
Answer:
The process by which plants use energy from sunlight to convert water and carbon dioxide into glucose and oxygen is called photosynthesis. This process takes place in the chloroplasts of plant cells, which contain a green pigment called chlorophyll.
During photosynthesis, the chlorophyll absorbs light energy from the sun, which is used to split water molecules into oxygen and hydrogen ions. The oxygen is released into the atmosphere, while the hydrogen ions are used to produce ATP, a molecule that stores energy.
Next, the plant takes in carbon dioxide from the air and combines it with the hydrogen ions to produce glucose, a simple sugar that the plant uses as food. This process is known as the Calvin cycle.
Overall, photosynthesis is a vital process that allows plants to produce their own food and oxygen, and it is essential for supporting life on Earth.
Drag the fossil fuel (or fuels) on the left to each characteristic described on the right. Terms may be used once, more than once, or not at all.
Coal, Natural gas and Oil are the following fossil fuels used and their characteristics are described in the following manner.
1. Primarily used for power generation in the United States : coal.
2. Remains of ancient organisms altered below ground by temperature and pressure over long periods of time : coal, oil, natural gas
3. The World's Most Abundant Fossil Fuels : coal
4. Mixtures of hundreds or thousands of different hydrocarbon molecules : oil
5. Major fuels used for heating and hot water in the United States : Natural gas
6. Produced very slowly and considered non-renewable at current extraction rates : coal, oil, natural gas
7. Used primarily in the United States as a source of automotive fuel : oil
8. Lowest carbon dioxide production per unit of energy when burned : Natural gas
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Cortisol is a hormone that is released to signal which of the following
A stop eating
B tiredness & fatigue
C alertness or stress
D) hunger
An excerpt from the procedure of an experiment is shown below. "In order to determine the effectiveness of various enzymes on the rate of a reaction, we prepared six samples, adding a different enzyme to each sample. Each sample was kept at 70°C for the duration of the reaction..." Based on the information in the excerpt, which of the following is true? A.
The samples should not have been kept at the same temperature.
B.
One sample should have had no enzyme and acted as a control.
C.
There were no variables present in the experiment.
D.
The experiment will not give useful results because all enzymes become inactive above 67°C.
Answer:
One sample should have had no enzyme and acted as a control.
9. Why is the cell cycle important?
Answer:
The cell cycle is the replication and reproduction of cells, whether in eukaryotes or prokaryotes. It is important to organisms in different ways, but overall it allows them to survive. ... Plants require the cell cycle to grow and provide life for every other organism on earth.
pls give me brainless.
Answer:The cell cycle is the replication and reproduction of cells, whether in eukaryotes or prokaryotes. It is important to organisms in different ways, but overall it allows them to survive. ... Plants require the cell cycle to grow and provide life for every other organism on earth.
Explanation:
Why is it important to distinguish true north from Geomagnetic north
True north is a fixed point on the globe. Magnetic north is quite different. Magnetic north is the direction that a compass needle points to as it aligns with the Earth's magnetic field. What is interesting is that the magnetic North Pole shifts and changes over time in response to changes in the Earth's magnetic core.
When leaves change colors in the fall which colors of light is reflected and not absorbed?
pigments that give leaves their red, purple, and blue colors, are produced by the plant in response to certain environmental stressors such as drought, high sunlight, and low temperatures.
When leaves change colors in the fall, the levels of chlorophyll, the pigment that gives leaves their green color, decrease and the chlorophyll breaks down. This causes the green color of leaves to fade, revealing other pigments that have been present in the leaf all along. As the chlorophyll breaks down, other pigments become more visible, reflecting different colors of light. Carotenoids, which are pigments that give leaves their yellow and orange colors, are always present in leaves, but as the chlorophyll breaks down these pigments become more visible and reflected.
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The chemical equation below shows the reaction of glucose and oxygen. Which process does this equation represent?
A. Photosynthesis
B. Anaerobic Respiration
C. Aerobic Respiration
D. Nitrogen Fixation
You are attempting to synthesize rRNA in a test tube using DNA isolated from mouse cells. In addition to the template DNA, ribonucleotides, and the necessary transcription factors, you should also add what enzyme to the test tube?
poly-A polymerase
RNA polymerase III
RNA polymerase I
RNA polymerase II
In addition to the template DNA, ribonucleotides, and the necessary transcription factors, you should also add RNA polymerase I enzyme to the test tube.
The pace of protein synthesis, which is closely linked to ribosome production and rRNA transcription, directly affects the rate of cell development. Therefore, rRNA synthesis must be synchronised with other protein translational components using intracellular cues. It is known that Myc interacts with human ribosomal DNA to promote the transcription of rRNA by RNA polymerase I. To ensure that rRNA synthesis and Pol I-mediated transcription are properly regulated, two distinct mechanisms have been found. The first phase involves fluctuations in the amount of genes that are being transcribed at any particular time due to the enormous number of rDNA genes that are available for transcription (several hundreds).
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What is the significance of the fossils preserved in the Dove Spring Formation to our understanding of Earth’s history?
Answer:
Due to information about the earth history.
Explanation:
There is a great significance of the fossils that preserved in the Dove Spring Formation in order to our understanding of Earth’s history because these fossils provides a lot of information about the history of the earth. Dove Spring Formation (DSF) is an 1,800-m-thick succession of fluvial, lacustrine, and volcanic rocks that comprise of diverse vertebrate fossil collections that provides information and knowledge about the different organisms present in the history of earth.
True or false
can you have the same phenotype without having the same genotype