Answer:
Oxygen
Explanation:
Answer:
oxygen
Explanation:
The main job of red blood cells, or erythrocytes, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs. Hemoglobin (Hgb) is an important protein in the red blood cells that carries oxygen from the lungs to all parts of our body.
Which best describes the history of scientific knowledge? (10 points)
a.) Scientific knowledge changes over time because new experiments are conducted and new data is introduced.
b. ) Scientific knowledge changes as political conditions change.
c.) Scientific knowledge changes when different scientists become more popular.
d.) Scientific knowledge does not change because science is factual.
Answer:
A.
Explanation:
B doesn't make sense because scientist are more focused on there work rather than politics. C also isn't true because just because the scientist is popular he doesn't gain any power. D is just stupid over all because its an extremes false.
Scientific knowledge changes over time because new experiments are conducted and new data is introduced best describes the history of scientific knowledge.
What is scientific knowledge? How it changes over time?Empirical evidence underpins scientific knowledge. Finds accurate instances of data that can be used as evidence. For example, much of the information about the seafloor is gathered through indirect methods. Instead, scientists time how long sound waves take to reflect off the ocean floor.Because all scientific theories require experimental and observational confirmation, all scientific knowledge is vulnerable to change in principle as new data becomes available.Science knowledge's accepted viewpoints might shift throughout time. Changes might be triggered by new scientific findings, but they can also be influenced by social, political, or religious beliefs.
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Earthworms contribute to decomposition by A. breaking down matter into inorganic nutrients through mineralization. B. breaking up litter into smaller particles, thereby increasing the surface area and allowing for more efficient chemical breakdown. C. releasing enzymes that convert inorganic molecules into organic macromolecules. D. decreasing the amount of oxygen in the soil, thereby increasing mineralization.
Answer:
B. breaking up litter into smaller particles, thereby increasing the surface area and allowing for more efficient chemical breakdown.
Explanation:
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Which statements describe the benefits of artificial reefs? Select three options.
They can attract marine organisms.
They can form on top of existing reefs.
They can prevent beach erosion.
They can damage the natural ecosystem.
They can attract tourists to the area.
Answer:
They can attract marine organisms.
They can prevent beach erosion.
They can attract tourists to the area.
Explanation:
Answer:
A C E
Explanation:
Those are the answers on edge
Hummingbirds are small birds that require a regular food supply. When hummingbirds are faced with a situation that decreases their food supply, such as a storm, which of the following adaptations would be most useful for the bird to survive such an unpredictable and short-term absence of food resources?
A) shivering
B) torpor
C) hibernation
D) burrowing into soil
Answer:
B
Explanation:
B) torpor. In the case of a temporary food shortage, like a storm, hummingbirds would find torpor to be most useful. This is a state of reduced physiological activity which allows them to conserve energy, unlike alternatives such as shivering, hibernation, and burrowing into the soil.
Explanation:When hummingbirds are faced with a scenario that reduces their food supply, such as a storm, the most beneficial adaptation for the bird to survive such a temporary and unpredictable absence of food resources is B) torpor. Torpor is a state of decreased physiological activity in an animal, usually characterized by a reduced body temperature and metabolic rate, allowing the bird to conserve energy during periods of little or no food availability. Unlike hibernation, which lasts for longer periods and usually occurs seasonally, torpor can be entered and exited on a daily basis, making it suitable for sudden and short-term shortages of food. The attributes of shivering, burrowing into soil, or hibernation would not be as efficient for hummingbirds facing a temporary lack of food due to a storm.
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The circular folds of the small intestine enhance absorption by causing the chyme to spiral, rather than to move in a straight line, as it passes through the small intestine.
Answer:
This is true .
Explanation:
Digestion is the process by which food substances are broken down into smaller substances through enzymatic actions and then absorbed into the body as nutrients.
As food passes through the digestive tract, it becomes less complex and the nutrients are more readily available to the body.
The circular folds of the small intestine enhance absorption by causing the chyme to spiral, rather than to move in a straight line, as it passes through the small intestine.
The following cell is most likely in which stage of mitosis
A. prophase
B. Metaphase
C. anaphase
Answer:
literally all of them??
Explanation:
The correct stage of mitosis for the cell is option C - anaphase.
Mitosis is the process by which a eukaryotic cell divides to form two genetically identical daughter cells. It consists of several stages: prophase, metaphase, anaphase, and telophase.
During anaphase, sister chromatids (identical copies of a chromosome) are pulled apart toward opposite poles of the cell. The centromere (the region that holds sister chromatids together) splits, allowing each chromatid to move independently. The spindle fibers (microtubules) attached to the centromeres shorten, pulling the chromatids toward the poles. As a result, each daughter cell will receive an identical set of chromosomes.
In the image, we see distinct sets of linear structures (chromatids) being pulled apart toward opposite ends of the cell. This arrangement aligns with the process of anaphase, where chromatids separate. The overall shape of the cell suggests division along the vertical axis.
Based on the characteristics observed in the image, we can conclude that the cell is in the anaphase stage of mitosis.
A zebra migrates to join a different herd of zebras
Explanation:
what are you referring to basically be specific
Answer: A zebra migrates to join a different herd of zebras
Explanation:
The photograph below shows a portion of the Genesee River in western New York. Letters A,B,C and D are locations in the river.
At which location would deposition of sediments most likely be greater than erosion?
1)A
2)B
3)C
4)D
Answer:c
Explanation:
The curve slows it down
Lobe finned fish include the ancestors of
Answer:
The Sarcopterygii, or lobe-finned fishes, is a clade containing the coelacanths, lungfishes, tetrapods, and their fossil relatives, including the osteolepiformes and panderichthyids. They are the sister group to the ray-finned fishes (Actinopterygii), together forming the bony fishes (Osteichthyes).
Explanation:
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Lobe-finned fish were ancestors to amphibians and consequently to reptiles, birds, and mammals. The two surviving groups are coelacanths and lungfish, which have fins with bone and muscle, foreshadowing the limbs of terrestrial vertebrates.
Lobe-Finned Fish and Their Descendants
Lobe-finned fish, which fall under the clade Sarcopterygii, are known for their distinctive fins that are fleshy and lobed, supported by bone. Some of the ancestral lobe-finned fish gave rise to forms that eventually evolved into modern tetrapods. These tetrapods include groups such as amphibians, reptiles, birds, and mammals. Unlike their cousins, the Actinopterygii or ray-finned fish, which include species like tuna, bass, trout, and salmon, lobe-finned fish have a richer evolutionary history that traces back to the early evolution of these significant land vertebrates.
The two groups of lobe-finned fish that have survived to the present day are the coelacanths and the lungfish. Originally thought to be extinct, coelacanths made a spectacular re-emergence in scientific awareness when a living specimen was discovered off the east coast of Africa in 1938. Lungfish are found in various places around the world, including Africa, South America, and Australia. Both groups exhibit the characteristic stump-like appendages of bone and muscle in their fins that served as the evolutionary precursor to the legs of amphibians and lungs.
A researcher observes two species of frogs in the same area. Both species have a similar diet. One species breeds in fast-moving streams, while the other species breeds in ponds. Both species are similar in appearance and have very similar DNA. Which information provides the best evidence that these two species descended from a common ancestor
The best evidence behind the two species of frogs having a common ancestor is their similar DNA, indicating they are closely related and have a shared evolutionary history. Their similar appearance, a result of homologous structures, further supports this. While their different breeding environments point to divergent evolution, their genetic similarities suggest a shared ancestry.
Explanation:The best evidence to suggest that the two species of frogs descended from a common ancestor is their very similar DNA. In evolutionary biology, organisms that share similar genetic makeup are usually closely related, which implies a common ancestry. Homologous structures, which could apply here in the similar appearance of the two frog species, are another indication of shared evolutionary history. In general, the more genetic similarities two species share, the more recently they have diverged from a common ancestor.
Despite the different breeding environments, the two species have very similar DNA which strongly points towards a common ancestor. Different environments might have led to divergent evolution, a process where two species evolve differently from a common ancestor. Here, one species might have adapted to breeding in fast-moving streams while the other adapted to breeding in ponds, even though they both originated from the same ancestor.
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List the classification categories for organisms from the broadest category to the most specific.
Answer:
Kingdom, Phylum, Class, Order, Family, Genus, Species
In a particular region, a species of lizard lives in the lowlands. Even though there are numerous mountains in the region, the climate on the mountains is too cold for the lizards to survive. Scientists are concerned that the lowlands will become much warmer by the end of the twenty-first century and will become unsuitable for this lowland lizard species. Which of the following best predicts the impact on the lizard species if there is a gradual increase in the average temperatures found in both the lowlands and mountains in this region?
A. Some lizards will migrate to new habitats in the mountains and become isolated, leading to allopatric speciation.
B. The species will undergo artificial selection, as the genes will adapt to warmer temperatures.
C The species will experience a genetic bottleneck, and sympatric speciation will result in thedevelopment of several new species.
D The lizards will hybridize with a different lizard species that is adapted to a warmer environment, leading to increased genetic variation in the species.
Answer:B
Explanation:
Reptiles are the cold blooded animals. The species that are most likely to survive will develop artificial selection. The correct answer is option B.
What type of species are reptiles ?Reptiles are the cold blooded animals and their heart is incomplete 4 chambered. They live both in land and water.
The species which are preferring to live in the colder regions will not live in the colder regions where the level of system will not run. In the meanwhile because of the increasing temperature because of the global warming and the green house effect, the temperature is rising.
In the temperature where it is higher and the temperature will become more higher meanwhile in this situation the desert life will demolish. Survival of the fittest where the best ones survive and the species where the most adapted in the nature develop are selected in the nature.
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The researchers hypothesize that crossing any unaffected female and an affected male will result in a
0% chance of producing an affected male offspring. Evaluate the validity of the hypothesis.
The researchers hypothesize that crossing any unaffected female and an affected male will result in a 0% chance of producing an affected male offspring - The hypothesis is correct
In the case of X-linked traits we know the following facts:
male being an XY is hemizygous for the X chromosome and it gets its X chromosome from female.Male get only Y chromosome from the male parentX chromosome only passed to female offspringSo in this case, X-linked trait is considered, if a male will get its chromosome from an unaffected female then there will be no chance of the male to be affected.Thus, The researchers hypothesize that crossing any unaffected female and an affected male will result in a 0% chance of producing an affected male offspring - The hypothesis is correct
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The hypothesis is valid as X-linked recessive traits would not affect male offspring from an unaffected female and an affected male, with males inheriting the Y chromosome from the father and a normal X from the mother.
The hypothesis that crossing any unaffected female with an affected male will result in a 0% chance of producing an affected male offspring needs to be evaluated considering X-linked recessive inheritance.
If the mutation is on the X chromosome and is recessive, an affected male (XY) has a mutant allele on his X chromosome.An unaffected female (XX) may be a carrier if she has one normal and one mutant allele.When they cross, the male will pass his Y chromosome to all his sons and his mutant X chromosome to all his daughters.Since the sons receive their X chromosome from the mother, who is unaffected, they will have a normal allele and not exhibit the condition.The daughters, however, will be carriers since they inherit the affected X from the father and a normal X from the mother.What tool is used to track inherited traits between parents and offspring?
Answer:
Pedigrees
Explanation:
he tool used to track inherited traits from parents to offspring is called Pedigrees. They are visual representations that help us understand the presence or absence of a certain genetic trait throughout generations
Under a microscope smooth muscles are
Under a microscope, smooth muscles appear as elongated, spindle-shaped cells with a single, centrally located nucleus.
They do not have the striated appearance that skeletal muscles have, which is why they are called ""smooth."" The cells are typically arranged in bundles or sheets and are surrounded by a connective tissue sheath called the endomysium. The cytoplasm of smooth muscle cells contains actin and myosin filaments, which are responsible for the muscle's contractile properties, but these filaments are not arranged in the regular, repeating patterns seen in skeletal muscle, hence the lack of striations.
Smooth muscles are involuntary, meaning they are not under conscious control, and they are found in the walls of internal organs such as the stomach, intestines, blood vessels, and bladder, where they play a crucial role in functions like digestion, blood flow, and excretion."
The volume of blood filtered by the kidneys is 1.18 dm^3 min^(-1).
Calculate the total volume of blood filtered in 24 hours.
Answer:
1699.2 cubic decimeters
Explanation:
The kidney is the major excretory organ in the human body. It filters the blood and removes waste.
According to the question, the volume of blood the kidney filters is 1.18 dm^3 min^(-1). This means that the kidney filters 1.18 dm^3 of blood per minute. This can be alternatively written as 1.18 dm^3/min
To calculate the volume of blood that will be filtered by the kidney in 24hours, it is necessary to convert 24 hours to minutes.
If there are 60 minutes in 1 hour
Then, there would be 60 × 24 minutes in 24 hours
I.e. there are 1440 minutes in 24hours
Based on this, if the kidney filters 1.18 dm^3 of blood in 1 minute
Then, (1440 × 1.18) dm^3 of blood will be filtered in 1440 minutes (24 hours)
1440 × 1.18 = 1699.2
Therefore, the kidney will filter a total of 1699.2 dm^3 of blood in 24 hours.
A windstorm in a forest blows down the largest trees in a particular area of the forest. Soon, sun-loving plants sprout in the new clearing. What type of succession is this? What do you think the area will look like in 5 years? 50 years?
Answer:
Secondary succession
Explanation:
When a previously occupied area is re-colonized after a natural disaster or human activities that wiped out the previous community, then the type of succession is called a secondary succession. A practical example is abandoned farmland that a farmer left for a period of time and later revisited for farming afterwards.
Because the pioneer organism( sun-loving plants ) were already on ground it will be fast for them to populate the area,grasses will sprout up too. insects, dentritivores, reptiles will move into the habitats.
After 5years;The habitat is populated by shrubs, which owns the forest floors. small pine, oak may soon join.a stable climax community.
Assuming the community is not interfere with bigger dominant trees , e,g the oak developed and other tree developed to bigger tree , followed by more insects, birds, rodents, herbivores and some carnivores, This entire sequence of event may take 50 years, to reach this climax community.
Final answer:
Secondary succession occurs after a disturbance, like a windstorm, leading to a new growth of pioneer species. In 5 years, grasses and shrubs would cover the area, and in 50 years, young trees would establish, potentially leading to a climax community resembling the original forest.
Explanation:
The type of succession you're describing is known as secondary succession. This process occurs after a disturbance like a windstorm in a forest. Initially, sun-loving plants or pioneer species such as grasses and annual plants sprout in the new clearing because they're adapted to conditions of high sunlight. Over time, these species modify the environment, making it more suitable for other species that follow.
In 5 years, the area will likely be populated by fast-growing grasses and shrubs, as these species can quickly take advantage of the increase in available sunlight after the trees are gone. In 50 years, the area might start to look more like a young forest, with small trees like pine, oak, and hickory becoming more established, as they slowly replace the shrubs. These are known as intermediate species. Eventually, the area could develop into a mature forest similar to the one before the storm, a stage known as the climax community.
PLEASE HELP EASY 25 POINTS Based on this cladogram, which organism is most closely related to cow and deer? Why?
Without a provided cladogram, we can conceive that the organism most closely related to cows and deer would be whichever organism shares the most recent common ancestor with them, as depicted by the nearest branching point on a cladogram.
Explanation:Without a presented cladogram, I can provide a general explanation. In biology, we construct cladograms to illustrate the evolutionary relationships between different species. They represent hypotheses about the sequence of evolutionary events and shared characteristics of the organisms. For your question, to identify which organism is most closely related to cows and deer, one would look at the organism that shares the closest 'node' or branching point with cows and deer on the cladogram. The organism that branches off from the same point as the cow and the deer is the one most closely related to them.
This is because the closer two species or groups are located to each other on a phylogenetic tree or cladogram, the more recently they share a common ancestor. Therefore, if you find the organism that has the most recent common ancestor with the cow and deer, as represented by the nearest branching point on the cladogram, that is the organism most closely related to them.
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Sickle cell anemia is a genetic disease caused by an autosomal
recessive gene. If each parent carries one sickle cell allele, what
are the chances that their child will have sickle cell anemia?
Select one:
•no chance
•one in four
•three in four
•two in four
Answer: one in four
Explanation:
The child will be a carrier three out of four, but will have sickle cell one out of four.
Make a punnet square
S s
S. SS. Ss
s. Ss. ss
Reactions that require CO₂ take place in ________.
a. the Calvin cycle alone
b. the chloroplast, but not as part of photosynthesis
c. both the light reactions and the Calvin cycle
d. the light reactions alone
e. neither the light reactions nor the Calvin cycle
Answer:
The correct answer is: A) the Calvin Cycle alone.
Explanation:
These reactions happen in cells capable of photosynthesis.
The only out of these reactions that require CO2 to take place is the Calvin Cycle. The Calvin Cycle is a series of biochemical processes that occur in the chloroplasts during photosynthesis. The Calvin Cycle uses carbon dioxide (CO2) and water to produce glucose, which will give energy to the cells.
The light reactions occur during photosynthesis in the presence of light and involving photophosphorylation. The light reaction does not make use of CO2, as it takes solar energy and converts it into NADPH and ATP.
Answer:
the Calvin cycle alone.
Explanation:
Which are observations about the tree on the right? Check all that apply. The tree is a pine tree. The leaves are dark green. The leaves are needle-like. The leaves are attached to the stem. The tree is a shelter for birds. The tree lives in an area where it rains often. A tree with green needle-like leaves. Photo by Walter Siegmund
Answer: B The leaves are dark green
C The leaves are needle-like
D The leaves are attached to the stem
Explanation:
The observations about the tree on the right are the leaves are dark green, the leaves are needle-like, and the leaves are attached to the stem.
What is a Dichotomous key?A dichotomous key is a tool for identifying organisms or objects found in nature, such as plants, animals, or rocks.
The key is made up of a set of paired statements or clues about features or characteristics that serve as a step-by-step guide to identifying each entity.
Thus, the correct options are B, C, and D.
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Which is the correct description of the 2nd step in the Lytic cycle?
Answer:
Attachment and entry. The virus physically attaches to the host and enters the cell membrane.
Explanation:
Lytic versus lysogenic cycle: A temperate bacteriophage has both lytic and lysogenic cycles. In the lytic cycle, the phage replicates and lyses the host cell. In the lysogenic cycle, phage DNA is incorporated into the host genome, where it is passed on to subsequent generations.
What do the elliptical orbits of the planets look like?
The elliptical orbits of the planets are oval-shaped paths determined by Kepler's laws, with the sun at one focus. Planets move faster when nearer to the sun and slower when farther, and some orbits appear nearly circular while others, like Pluto's, are more noticeably elongated.
According to Kepler's elliptical orbit law, each planet's path around the sun is an ellipse, with the sun situated at one of the focal points of this ellipse. This means the orbits are not perfect circles, but rather oval-shaped, with varying degrees of elongation.
While the orbits of the planets are indeed elliptical, many of them appear nearly circular due to their low eccentricity, which is a measure of the deviation of the orbit from a perfect circle. For example, the Earth's orbit is only slightly elliptical, appearing almost circular in many illustrations. However, some planets, like Pluto, have more elongated orbits. Moreover, as per Kepler's equal-area law, a line that connects a planet to the sun sweeps out equal areas during equal intervals of time, indicating that a planet travels more quickly when it is closer to the sun and more slowly when it is farther away.
Natural selection acts on the distribution of traits. When graphed, natural selection shifts the graph away (new population) from its original shape (original population). The original graph that serves as a baseline for the shifts in traits caused by natural selection is referred to as what type of distribution and is represented by what type of curve? a.) Normal distribution/Spiked-curve
b.) Abnormal distribution/Bell-curve
c.) Normal distribution/Bell-curve
d.) Abnormal distribution/Spiked Curve
The enzyme complex associated with dna in the associated figure is ________.
Answer:
RNA polymerase.
Explanation:
What is the similarity between sharks and ray-finned fishes?
The question is incomplete as it does not have the options which are:
A) The skin is typically covered by flattened bony scales.
B) They are equally able to exchange gases with the environment while stationary.
C) They are highly maneuverable due to their flexibility.
D) They have a lateral line that is sensitive to changes in water pressure.
E) A swim bladder helps control buoyancy.
Answer:
D) They have a lateral line that is sensitive to changes in water pressure.
Explanation:
Both rays and sharks are the groups of fishes which are considered together in the category of the cartilaginous bones.
The rays are flattened fishes with the presence of the pectoral fins which are not found in the Sharks.
But the rays are considered the most closely related group of fish to the sharks as they both possess a unique sense organ called lateral line which detects the vibrations and the movement of water in the body.
Thus, Option-D is correct.
Bacterial conjugation
Drag each phrase into the appropriate bin depending on whether it applies to an F+ cell, an Hfr cell, or an F- cell. (Remember that we are only considering conjugation involving the F factor here, and not other mechanisms for transferring genetic material.)
F+ cell:
1) carries the F factor in a plasmidmay
2) may donate a plasmid to another cell
Hfr cell:
1) carries the F factor in its circular chromosome
2) may donate genes from its chromosome to another cell
F- cell:
1) may become F+ after conjugation with an F+ cell
2) may become recombinant after conjugation with an Hfr cell
3) may receive genetic material, but cannot donate genetic material
Answer:
Yes, these are correct.
Explanation:
Bacterial conjugation is the bacterial counterpart of sexual reproduction. Also known as horizontal gene transfer, it involves the transfer of genetic material from one F+ or Hfr bacterium to another F+ or F- bacterium.The F or fertility factor is a crucial component of the bacterial plasmid and it accounts for the development of sex pili which are important for conjugation. An F+ cells contains the F-factor incorporated into its plasmid, whereas an F- cell lacks the F-factor and therefore cannot participate in conjugation.Conjugation between an F+ and F- cell can result in the transfer of the F-factor to the F- bacterium.An Hfr bacterium contains F-factor incorporated into its circular genome.What would happen if a plant’s xylem was completely blocked?
Answer:
In transpiration pull, the evaporation of water from leaves (mesomorph cells) creates negative pressure or tension in the xylem that pulls the water from the roots and soil. But if we block the xylem at root, transpiration pull also get affected resulting in wilting of plants.
Explanation:
The inertia of an object depends on its?
The inertia of an object depends on its mass!
Give two advantages that cells gain by storing energy in the form of ATP
ATP is used in different cellular processes such as DNA replication, transcription, and translation. It helps in the active transport of molecules by cells. These are the advantages.
What is the role of ATP in the cell?ATP is called the energy coin of the cell. Most of the ATP is synthesised in the mitochondria by cellular respiration. 7.3 kcal of energy are released when ATP breaks.
Different cellular processes, such as DNA replication, translation, transcription, etc., use ATP. If ATP is absent, then these active processes can't happen in the cell. In active transporters such as sodium-potassium ATPases, ATP is used to provide energy. ATP provides the energy that is required for these cellular processes. Active transport and active cellular processes are two of ATP's advantages.
Hence, ATP provides energy for different active cellular processes such as DNA replication, transport across the membrane, etc.
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