A 40% reduction in height was observed.
Explanation:Researchers tested the effects of acid rain on seedlings of two different species, camphor tree (cinnamomum camphora) and chinaberry tree (melia azederach). acid rain caused a significant reduction of growth in chinaberry trees), but not in camphor trees.
40%-THE HEIGHT WITH DISTILLED WATER WAS 25, WHILE WITH A PH OF 2 IT WAS 15, THEREFORE A 40% REDUCTION IN HEIGHT WAS OBSERVED.
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.
When the body is attacked by a foreign substance, the what defenses are the first to react
B lymphocyte would be the answer
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.
The Cahuilla tribe was a Native American community that lived in the arid area near present day San Diego. The Cahuilla's diet relied heavily upon mesquite beans. In order to preserve the plants only a portion of the beans that were available to harvest were harvested. Why were some of the harvestable beans left on the plant?
A) for wildlife to eat
B) for later harvest
C) to grow into new plants
D) lack of room in the harvest basket
The correct option is c, to grow new plants.
People in the Cahuilla tribe depended mostly on desert plants for their food. Acorns were popular as the oak trees could not grow in desert areas. The common food for these tribes included the fruit of mesquite tree. During the spring season mesquite blossomed which was eaten by boiling. During summers the pods which were green was used as a drink by grinding. After the pods dried they were eaten from the tree directly or made mesquite cakes which could be stored for long time. In all the conditions and seasons, not all the beans were harvested but a portion was left in the plant so as to let them grow into new plants and trees.
What treats the body using principles similar to acupuncture and acupressure?
hormones that are secreted by the posterior pituitary gland are made in the
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 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
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 _____.
Which direction do a comet's dust and plasma tails point?
Comet tails, both dust and plasma, point away from the Sun due to the Sun's radiation and solar wind. The dust tail is formed by light reflecting off evaporated particles, while the ion (gas) tail is formed by the Sun's solar wind interacting with ionized gases.
Explanation:A comet's dust and plasma tails always point away from the Sun. This phenomenon is due to the interaction between the Sun's radiation and the comet materials. As the comet approaches the Sun, the heat causes gases and dust to evaporate from the body of the comet. This forms the comet's tail, which is an extension of its atmosphere.
The comet essentially has two tails: the dust tail and the ion tail. The dust tail is made up of tiny dust particles, pushed away from the Sun by light reflecting from them, creating a tail that curves a bit. On the other hand, ion tail is made of ionized gas and is affected more by the Sun's solar wind, which are streams of charged particles issuing from the Sun. This creates a tail that points more directly away from the Sun.
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The release of large quantities of merozoites into circulation at one time is due to a form of reproduction by plasmodium known as __________.
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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Which product is made from renewable resource?
A. Blueberry pie
B. Gold ring
C. Kaolin porcelain
D. Aluminum can
The product that is made from renewable resource is Blueberry pie.
(Option A).
What is a renewable sources?A renewable resource is a natural resource that can be replenished or regenerated within a human lifespan or a relatively short period of time.
It is typically derived from living organisms or natural processes that can be sustained or restored through proper management.
In the case of option A, blueberry pie, the primary ingredient is blueberries. Blueberries are fruits that grow on shrubs or bushes, and they are considered a renewable resource for several reasons:
Regenerative natureSustainable farming practicesLow environmental impact.Thus, the product that is made from renewable resource is Blueberry pie.
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Under what conditions does the trp repressor block transcription of the trp operon?
Answer:
when the repressor binds to tryptophan
Explanation:
Transformation did not occur when dna was destroyed true or false
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
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.
The absoprtion and disribution of materials within n organism is a life function known as
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.
what bacterial species can be eliminated as possibilities for the bacteria responsible for Anna's infection?
the formula for the table salt is NaCI. According to the law of definite proportions, this means that the formula for the table salt
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.
Which two hormones are consistently related to high levels of aggression?
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
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
Patau syndrome is cased by what chromosome?
Patau syndrome is cased by the thirteenth chromosome.
Personality assessments conducted by behaviorists sometimes make use of _______. (1 point) question 56 options: 1) projective tests 2) introjective tests 3) reports by friends 4) responses to hypothetical situations 5) rating scales and frequency counts
The right option is 5) rating scales and frequency counts
Personality assessment is the measurement of personal characteristics of an individual. Personality assessments conducted by behaviorists sometimes make use of rating scales and frequency counts as they allow easy characterization of people and their behaviour.
Which cells in the seminiferous tubules regularly undergo mitosis?
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?
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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