Answer:
DNA polymerase
Explanation:
Prior to cell division, the DNA of that cell must be replicated in order for each daughter cell to receive the correct amount of genetic material (DNA). This process of DNA replication occurs in the Synthesis phase of Interphase. Before DNA starts replicating, the double-stranded DNA is unwound by an enzyme called DNA HELICASE to form two separate single strands.
Each of these strands serves as a template for replicating a new strand. An enzyme called DNA primase catalyzes the attachment of short nuceleotide sequences called PRIMER to the template strand in order for DNA POLYMERASE to synthesis/add new nucleotides to the growing DNA.
DNA polymerase adds nucleotides that are complementary to the ones it reads on the template strand.
During DNA replication, the enzyme that is responsible for adding nucleotides to the growing DNA strand is DNA polymerase. This enzyme synthesizes new DNA strands according to the template DNA, ensuring the accurate reproduction of the genetic information.
Explanation:The enzyme responsible for adding nucleotides to the growing DNA molecule during DNA replication is DNA polymerase. DNA polymerase is a key component in the process of DNA replication, where it synthesizes new strands of DNA according to the template provided by the original, parental DNA strand. The enzyme's function is to add nucleotides that correspond to the nucleotide sequences in the template strand, thereby ensuring the accurate replication of the genetic information.
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Which layer of skin provides nutrition to the epidermis?
a. hypodermis
c. dermis
b. subcutaneous layer
d. adipocytes?
Why is milk used as a first-aid remedy for someone who has swallowed a heavy-metal poison?
Answer:
Heavy metal poison specifically due to lead are removed by intake of milk (as it is a source of calcium)
Explanation:
Toxicity produced by heavy metal specifically lead can be removed by intake of calcium metal which is predominantly found in milk. The interaction between lead-calcium subsides the toxicity of lead.
Both calcium and lead ion i.e Pb(2+) and Ca2+ compete with each other for transportation at the plasma membrane but due to the presence of Ca2+ channels, and the Ca2+ pumps, calcium get preference over lead and hence it is removed from the nervous system.
When can aural method be used to take body temperatures?
Characteristics between the branch points of a cladogram that are shared by all organisms above (after) the branch point and are not present in any below (before) it are called
Shared derived characteristics are traits that appear at a branch point in a cladogram and are shared by all organisms above this point but not ones below. They represent new traits that have evolved and differentiate the species within a clade from their common ancestors. Phylogenetic trees or cladograms visually demonstrate these evolutionary relationships and divergences from common ancestors.
Explanation:The characteristics between the branch points of a cladogram, which are shared by all organisms above the branch point (after) and not present in any below it (before) are known as shared derived characteristics. These denote traits that appeared in the lineage leading up to a clade and hence, are shared uniquely by the species within this clade. For instance, refer to the example of the amniotic egg feature in a certain cladogram. This trait appears at a specific branch point and is shared by all organisms above this point but not the ones below it, marking it as a shared derived characteristic.
A cladogram or a phylogenetic tree displays the hypothetical relationships among species based on their shared derived characteristics. It allows for a visual depiction of the evolutionary history and the divergence of species from common ancestors. The point on the tree where a split occurs, known as the branch point, signifies where a single lineage evolved into distinct new ones. Each branch point represents a shared derived character that differentiates the descendant species from their ancestors.
As an example, humans and chimpanzees diverged from a common ancestor, represented by a branch point on a phylogenetic tree. Both the humans and chimpanzees possess certain shared derived characteristics that are distinct from their common ancestor, facilitating their separation into distinct clades.
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A student studying the biosphere makes a list of biotic and abiotic characteristics of various biomes. which characteristic is considered a biotic factor?
In terms of biomes, a biotic factor is a living component, such as organisms, whereas an abiotic factor is nonliving, like temperature or soil. The biotic factor in the given options is the disease-causing microbe, as it directly influences the biotic community in an ecosystem.
Understanding Biotic and Abiotic Factors in a Biome
In the context of biomes and ecosystems, a biotic factor refers to the living components present in an environment. These living aspects, like animals, plants, fungi, and microorganisms, are vital for the maintenance and reproduction of ecosystems. On the other hand, an abiotic factor includes the nonliving elements such as soil, sunlight, temperature, and water, which can influence the living aspects of the ecosystem significantly.
An example of the interaction between abiotic and biotic factors is the reliance of plants on soil quality (abiotic) for nutrient uptake, which in turn affects the types and numbers of plant-eating insects (biotic) that can thrive in that area. These insects support higher trophic levels, such as birds and mammals that feed on them. An equilibrium between these factors is crucial for the health and longevity of the biome.
The answer to the review question 'Which of the following is a biotic factor?' is B. disease-causing microbe, as it is a living entity that can affect the health and behavior of organisms within an ecosystem.
Patau syndrome is cased by what chromosome?
Patau syndrome is cased by the thirteenth chromosome.
You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. all of the f1 are pink. what can you say about the alleles for the parental traits? you cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. all of the f1 are pink. what can you say about the alleles for the parental traits? both red and white are recessive. red is dominant. red and white show incomplete dominance. pink is dominant, whereas red and white are recessive.
Answer:
Incomplete dominance
Explanation:
When you cross two true breeding parents, a red and a white snapdragon you would normally expect at least some of the offspring to have these same traits. The fact that all of the F1 have a completely different phenotype (pink flowers) indicates the existence of incomplete dominance, in which one of the phenotypes (red) is only partially dominant over the other (white). When you cross the F1 with each other then you again see the original phenotypes, red and white reappear.
When the body is attacked by a foreign substance, the what defenses are the first to react
B lymphocyte would be the answer
The release of large quantities of merozoites into circulation at one time is due to a form of reproduction by plasmodium known as __________.
What are restriction enzymes? in gel electrophoresis the dna fragments are separated according to _______. why do the largest dna fragments not move very far? in step 7, what does the term hybridize mean? what is the purpose of the dna probe hybridizing to the dna strand?
Which bacterial structure may survive if temperatures applied during food preservation processes are too low?
Final answer:
The bacterial structure capable of surviving low food preservation temperatures is the endospore. Endospores are highly resistant due to unique adaptations such as a thickened cell wall and decreased metabolic activity, making high enough temperatures crucial in food safety processes.
Explanation:
The bacterial structure capable of surviving low temperatures applied during food preservation processes is the endospore. Endospores are highly resistant to extreme conditions, including both high and low temperatures, due to their unique adaptations. These adaptations include a thickened cell wall, reduction in cytoplasmic volume, and alterations in cellular structure that significantly decrease metabolic activity, making them less susceptible to environmental stresses. During the food preservation process, if the temperatures are not adequately high to kill endospores, these structures can survive and potentially germinate later under favorable conditions, leading to food spoilage or foodborne illnesses.
It is crucial in food safety to understand that simply refrigerating or freezing food may not eliminate all microbial threats, particularly endospores. Effective food preservation methods must be applied to ensure that these resilient bacterial structures are adequately addressed. The critical role of high enough temperatures in processes such as pasteurization and sterilization is to ensure the destruction of endospores, preventing the risks they pose to food safety.
Soot plays an important role in climate change , but _______ is still the leading cause of earths changing climate.
A) acid rain
B) nitrous oxide
C) carbon monoxide
D) carbon dioxide
Under what conditions does the trp repressor block transcription of the trp operon?
Answer:
when the repressor binds to tryptophan
Explanation:
the formula for the table salt is NaCI. According to the law of definite proportions, this means that the formula for the table salt
A small number of birds arrive on an island from a neighboring larger island. This small population begins to adapt to the new food plants available on the island, and their beaks begin to change. About twice a year, one or two more birds from the neighboring island arrive. These new arrivals _____.
Transformation did not occur when dna was destroyed true or false
Dna replication:
a. occurs by the addition of nucleotides to the end of the dna molecule.
b. results in the formation of four new dna strands.
c. produces two daughter dna molecules that are complementary to each other.
d. uses each strand of a dna molecule as a template for the creation of a new strand.
e. begins when two dna molecules join together to exchange segments.
A biologist discovers two new species of organisms, one in africa and one in south america. the organisms resemble one another closely. the best type of evidence in determining whether these organisms are closely related or are the products of convergent evolution. would be analysis of the behavior of the two species.
a. True
b. False
Definition: these are physical features shared by organisms with common ancestry; they may have the same structure, but different functions developmentally mature organisms.
Its This is the evolutionary history of a species or group of related species.
If four languages have similar words for numbers and the names of fish, but different names for a certain disease, what might be concluded about the time at which the disease first diffused
Linguistic variations in the naming of a disease across different languages may suggest that the disease was introduced or prevalent at different timelines in those societies. This is based on the premise that language evolves to reflect cultural experiences, including diseases.
Explanation:If four languages have similar words for numbers and the names of fish, but different names for a certain disease, it could potentially suggest that the disease was introduced or became prevalent at a later time period. This conclusion is based on the Language Hypothesis, which suggests that culture and linguistic changes can be influenced by the experiences of a people, including diseases.
For example, when the hantavirus struck inhabitants of the southwestern United States in 1993, the disease was unknown to scientists and hence, it had no name initially. This could have been reflected in the language of the people affected, creating a new terminology associated with the disease. Hence, if different languages have different words for a disease, it could suggest that the disease was not present or widespread when these languages were forming common vocabulary on basic elements like numbers and names of commonly found fish.
Also, the historical understanding of disease, its contagion, and containment have evolved over centuries. Early civilizations understood that some diseases could be communicable and had quarantine measures for diseases like leprosy. However, it was not until modern microbiology that we gained a fuller understanding of how diseases spread. All these factors possibly influence the development and change of language over time. Hence, understanding this interconnection can provide clues about the history of diseases.
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The cardiovascular system of a mouse works like that of a human. a mouse is moved from sea level (low altitude) to the top of a mountain (high altitude). how could this mouse's cardiovascular system maintain a similar rate of oxygen delivery to its tissues now that the mouse is at the top of the mountain?
The mouse's cardiovascular system can maintain a similar rate of oxygen delivery to its tissues at high altitude through acclimatization.
Explanation:When a mouse is moved from low altitude to high altitude, its cardiovascular system can maintain a similar rate of oxygen delivery to its tissues through acclimatization. In response to the lower oxygen levels at higher altitude, the body increases the production of red blood cells to carry more oxygen. The hormone erythropoietin (EPO) is released by the kidneys to stimulate the production of red blood cells, resulting in a greater number of circulating red blood cells. This increase in red blood cells allows for more oxygen to be transported to the tissues, maintaining a similar rate of oxygen delivery.
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Over the past century, the global sea level has risen by 4 to 8 inches. However, over the last 20 years this increase has been occurring at approximately twice the average speed of the preceding 80 years.
__________ is NOT a cause for this increased global sea level.
A) Thermal expansion
B) Melting of glaciers and polar ice caps
C) Ice loss from Greenland and West Antarctica
D) An increase in the water present in the water cycle
A parent has blue eyes and passed this characteristic on to his child. Which molecule contains the information necessary for passing on this characteristic?
a.protein
b.DNA
c.lipid
d.enzyme
Which two hormones are consistently related to high levels of aggression?
Which cells in the seminiferous tubules regularly undergo mitosis?
which location is the flattest part of the ocean?
a) continental break
b) rift zone
c) submarine canyon
d) abyssal plain
PLEASE ANSWER ASAPPP
the answer is abyssal plain
The absoprtion and disribution of materials within n organism is a life function known as
what bacterial species can be eliminated as possibilities for the bacteria responsible for Anna's infection?
Cave formation in which material accumulates from the ceiling.
Cave formations called stalactites accumulate from the ceiling of caves due to the deposition of minerals, mainly calcium carbonate, from dripping groundwater. Over thousands of years, these formations grow from the ceiling down. This process is part of the larger cycle of limestone dissolution and re-deposition in caves.
Cave formation occurs when groundwater dissolves minerals in rocks, particularly limestone, which primarily consists of calcium carbonate (CaCO₃). When this water that is rich in dissolved minerals drips from the ceiling of a cave and the minerals come out of solution, they accumulate to form stalactites. These are icicle-like formations that hang from the cave ceiling and are created by the deposition of minerals over an extended period, often thousands of years. Similarly, when drips from stalactites reach the floor of the cave, they can form stalagmites, rounded deposits that grow upward from the floor.
The chemical reaction facilitating this process involves the formation of carbonic acid from rainwater and atmospheric CO₂, which dissolves CaCO₃. Over time, as the water evaporates, it leaves behind layers of CaCO₃ that precipitate out and eventually become the stunning cave formations we see today, such as the ones in Carlsbad Caverns, New Mexico, and Yunnan Province in China.
How are the fission and great-impact hypothesis of lunar formation similar?
In the two theories namely, Giant impact hypothesis and Fission theory, the moon is said to be formed either from a part of earth or moon is formed due to the some geo or astro physical process taking place on earth.
In the Fission theory , it was stated by George Darwin that plant earth was spinning at a very fast rate and due to that a small part of earth got separated and it became the present day moon.
Like wise in the great impact hypothesis, it was stated that “Theia” the mother of moon goddess Selene hit the Earth and due to this impact a portion of the planet came off and eventually became the moon