Obsidian is a rock with glass-like characteristics. Obsidian is formed by rapid what and why?
(a) weathering
(b) erosion
(c) cementation
(d) cooling
Pathogenic organisms do not include _____.
bacteria
viruses
rickettsiae
ticks
Human activity has led to clear cutting of the world's rainforests. Which is the best explanation of why this change has been detrimental? A) Cutting down the rainforest disrupts some trading routes. B) Cutting down the rainforest has created more land on which to grow food. C) Cutting down the rainforest makes the areas less desirable for tourists. D) Cutting down the rainforest destroys the habitat for a number of species
Wich of the following is not a major characteristic used to identify minerals
What events likely led to the outbreak of cholera in Haiti?
Haiti suffered a devastating earthquake in January 2010. Subsequently, much infrastructure in Haiti was destroyed, and many residents did not have access to safe drinking water and sanitation. Haiti suffered a devastating cholera outbreak soon after. Cholera is caused by a bacteria: Vibrio cholerae. The disease causes diarrhoea type symptoms. It is thought that the bacteria was introduced to Haiti by Nepalese peacekeepers from the UN. Since there was no safe sanitation, cholera sufferers would have contaminated the water supplies, leading to the spread of the bacteria in drinking water supplies.
The situation in Haiti became very fearful at the time of the earthquake in 2010. These situations result in a poor supply of food, water, and proper sanitation.
What do you mean by Cholera?Cholera may be defined as a disease caused by the bacterium Vibrio cholerae. This disease infects the intestine of the individual.
Cholera is generally spread due to contaminated food and water. Apart from this, It may also be spread due to messy and scattered management of proper sanitation.
Therefore, it is well described above.
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How does primary and secondary succession change ecosystems? Can you provide an example?
In a forest ecosystem including rabbits, wolfs, foxes, and plants, what are two possible reasons the rabbit population might decline?
Answer: There are too Many predators for the rabbits to hide from and The Food supply can decline over time, leading to less food for the remaining rabbits
What is a benefit of using technology to transport water?
D) Cities can be built in uninhabitable places
Methods for Transportation of water can be:
Aqueducts, which include pipelines, canals, tunnels and bridges.
Water transportation impacts every state, even those that do not border a navigable river or coast due to the volume of cargo that comes in and out of our country via water. An astonishing two billion tons of domestic and international cargo travels through ports and on waterways.
Thus, the benefit out of the following options for using technology to transport water is that cities can be built in uninhabitable places, i.e. option D.
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Explain using complete sentences where on the HR diagram you would expect to find a main sequence star based on its physical properties.
Explanation:
The Hertzsprung-Russel Diagram also known as HR diagram is stars' scatter plot showing the relation of luminosity or absolute magnitude vs spectral class or surface temperature. The main sequence stars can be plotted on a HR Diagram as a diagonal band as their physical properties vary a lot.
The mass of these stars ranges from about a tenth of that of the Sun to about 200 times the mass of the Sun. Inside these stars Hydrogen fusion results in Helium. 90% of the stars, including the Sun, in the Universe lies in this category.
Their surface temperature lies in the range of 2500 Kelvin to 40000 Kelvin.
Answer:
hr 9000
Explanation:
what does the muscular system do for your body
Answer:
It permits movement of the body, maintains posture and circulates blood throughout the body
Explanation:
Fill in the blank: Most fossils form when living things die and are buried by_______ that hardens into rock over time.
Um homem e uma serpente podem pertence a mesma população? e a mesma comunidade?
Which occurrence represents an example of evolution
Examples of evolution include the variation in the peppered moth's color, the similar winter adaptations of the unrelated arctic fox and ptarmigan, and changes in the beak shapes of Galápagos finches due to natural selection.
Explanation:Examples of evolution can be seen in various forms. One of the classic examples often used in biology textbooks is the peppered moth. Changes in the population's allele frequencies in light and dark forms, which represents small-scale evolution, could be traced back to this species.
Another example of evolution is the evolutionary convergence observed in unrelated species sharing the same environments. The arctic fox and ptarmigan, though not related, adapt to white phenotypes during winter to blend with the snow and ice, a testament to similar selection pressures.
Additionally, the Galápagos finches offer an illustration of evolution through natural selection. Shifts in the distribution of beak shapes from one generation to the next, caused by variations in environmental conditions, show how traits passed on can influence survival and reproduction.
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Refracting telescopes got their name because they refract or ?
Symptoms similar to a cold but with more intense fever and weakness are characteristic of _____.
yellow fever
influenza
measles
rabies
Answer:
yellow fever
Explanation:
Answer:
yellow fever
Explanation:
Identify the fungus type pictured below.
Which tool would you use to predict the percentage of offspring that will have a specific trait? Microscope Flowchart Pedigree chart Punnett square
A Punnett square is a diagrammatic tool that is used to predict the percentage of offspring that will have a specific trait during a cross between two parents.
What is a Punnett square?A Punnett square is a very useful tool in the study of genetics which is used to predict the offspring that a cross between two parents will produce.
The Punnett square provides information about the genotype as well as the phenotype of the offspring.
It also provides information about the ratio in which the genotype and phenotype of the offspring occur.
Therefore, a Punnett square is used to predict the percentage of offspring that will have a specific trait during a cross between two parents.
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Which of these statements is true?
RNA codes for DNA which codes for proteins.
DNA codes for proteins which codes for RNA.
DNA codes for RNA which codes for proteins.
RNA codes for proteins which code for DNA.
Answer:
DNA codes for RNA which codes for proteins.
Explanation:
The central dogma of molecular biology describes the flow of genetic information:
A single strand of DNA is transcribed into RNA by a mechanism called "transcription". Subsequently, this RNA is translated into proteins by a process referred to as "translation"
Which of the following is not a physical change?
glass breaking
iron rusting
ice melting
help pls
While observing some ants, a group of German scientists noticed that the ants had an excellent sense of distance. Wondering how this was possible, they decided to perform an experiment. First, the scientists taught ants to retrieve food from a feeder placed near the ants' home. Then, they removed the lower portion of some of the ants' legs to make them shorter. They also attached tiny stilts to some of the other ants' legs to make them longer. Finally, the scientists watched the altered ants attempt to retrieve food from the feeder. After several trials, the scientists found that the ants with shortened legs walked toward the feeder but stopped short of it. On the other hand, the ants with lengthened legs walked past the feeder. Which of the following conclusions can be made given this information?
A. Altering an ant's leg length has no effect.
B. The ants on stilts were more off balance than other ants.
C. The ants were no longer interested in the food.
D. Ants count their steps while walking.
Answer: Option D
Explanation:
The conclusion is that the ants counts their steps while walking and because of this there was no difference in the number of steps they walked.
The ants with smaller legs stopped before food and the ants with larger legs moved ahead from food.
The study and the experiment shows that the ants count their steps while moving forward. They track the path of other members that move forward them by counting steps.
Is this statement true or false? Road maps show the elevation of a part of the Earth's surface .
Coral bleaching most often takes place in the shallowest parts of a reef. This would indicate which of the following?
The shallow parts have more polyps.
The shallow parts are more susceptible to temperature.
The shallow parts have more starfish.
The shallow parts have more invasive species.
Coral bleaching can be defined as a condition in which occurs in the corals during the stress conditions.
Due to increase in the temperature of the surrounding water corals generally expel the algae that was living in the coral and due to this the corals appear white.
This is caused in the shallow parts because they are more susceptible to temperature change.
Hence, the correct answer is option B
which phase or cell division is shown?
A. prophase
B. metaphase
C. anaphase
D. telophase
hermit crabs live in shells made and then abandoned by snails
Lisa is eating dinner Which sensory organs is she most likely using to process what she is e ating?
Answer:
Eyes, Tongue, and Nose. Explanation:
if the mother is heterozygous and the father is heterozygous what is the genotype probabilities?
When both parents are heterozygous for a trait, the offspring have an equal chance of inheriting the four possible genotype combinations 'AA', 'Aa', 'aA', or 'aa'. Phenotypically, this equates to a 3:1 ratio of dominant to recessive traits. The probability of an offspring exhibiting the dominant phenotype is 3/4, and for the recessive phenotype, it's 1/4.
Explanation:If both the mother and the father are heterozygous for a trait, we can use the product and sum rules to calculate the genotype probabilities. In this scenario, we can adopt a method known as a Punnett Square to visualize the possible outcomes. Consider each parent can donate one of two different alleles. Let's denote these alleles as 'A' and 'a'.
Because each parent is heterozygous ('Aa'), the possible allele combinations for the offspring are: 'AA', 'Aa', 'aA', or 'aa'. Each of these combinations, representing the different genotypes, have equal likelihood of occurring. Therefore, the offspring show a genotypic ratio of 1 AA: 2 Aa :1 aa.
Now considering phenotype, the 'AA' and 'Aa' combinations would exhibit the dominant phenotype, and 'aa' would exhibit the recessive phenotype. Hence, if we apply the sum rule of probability, we expect the offspring to show a phenotypic ratio of 3 (dominant):1 (recessive). This means, the probability of an offspring exhibiting the dominant phenotype is 3/4 and the recessive phenotype is 1/4.
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If a tall stem is a dominant characteristic, in which case is the character of tall expressed
A: when both alleles contain instructions for tall
B: when at least one alleles contains instructions for tall
C. when at least one parent is tall
D:when both parents are tall
which of the following is responsible for transporting oxygen throughout the body
What type of lipid is estrogen
Which of the following remains relatively constant in an ecosystem?
Answer:
the amount of matter
Explanation:
study island