Answers
Answer and Explanation:
There are many physical elements such as temperature, precipitation, humidity, altitude, vegetation, among others, that influence the presence of the insects that transmit the Chagas diseases. Its transmission seems to be enhanced by other social elements, such as the deficiency in basic services, lack of planning, the socio-economical conditions, cultural conditions. Altogether, these factors intervene in the presence of the Chagas disease, a systemic infection caused by the protozoa Trypanosoma cruzi. This protozoan is hosted by different wild and domestic mammals, transmitted to the human by hematophagous insects. The transmission occurs through dejections deposited on skin or mucose during or after the feeding process.
Different rural areas in Central and South America are characterized by a mountain relief (temperatures between 15 and 30ºC - relative humidity between 50 and 90%), as well as by a plane relief associated with alluvial plain (temperature between 20 and 35ºC - media relative humidity of 75%). Vegetation in the mountain area provides a natural habitat to the triatomines, the insects that transmit the Chagas disease.
Constant deforestation in mountains, soil move, the cutting down, firing, have destroyed the natural habitat of the insects, becomming the cause of their arrival to populated centers. As their environment is destroyed, insects migrate to new areas and find refuge in precarious houses that surround the affected areas. Most of these houses have clay walls, a roof made of branches, and no floor. People that live in these conditions do not have economic resources. Indexes of infestation in these houses are high due to the material used for their construction. Insects tend to establish near a source of food, such as domestic animals or even humans. It is also common that these houses have chicken coops and farmyards that also offer good conditions for the insects to live in.
Economic activities are important variables to consider, as these define the way of living in a population.
Agriculture activities are performed with no control or planning. People deforest to plant, getting in contact with the insects' natural habitat, producing environmental changes, and getting in touch with them, enhancing the risks of being infected and of transportin the insects.
Related Questions
Our mountain regions are unique and beautiful places. We must preserve them for future generations. One of the most serious threats to our mountains is ridgetop development. Large housing developments built on steep slopes and along mountain ridges are unsightly. Also, they adversely affect the scenic views that draw tourists to our region each year. Who wants to drive to the mountains to see not the lovely tree-covered outline of the gently sloping mountain ridges against the sky, but rows of houses jutting from the ridges and slopes with little or no tree cover between them? With tourism as the biggest industry in our area, maintaining our scenic ridgelines is crucial to continued economic success here.
Ridgetop development not only detracts from scenic mountain views and threatens our area’s top industry, it also harms the environment. Stripping large areas to create multiple building sites removes the trees and other plants. These resources provide natural erosion barriers on steep slopes. Large housing developments on ridges often increase erosion and runoff into streams and rivers.
What type of essay is this, primarily?
Answers
This is a persuasive essay primarily focused on highlighting the negative impact of ridgetop development on mountain regions.
The essay provided presents a clear argument and aims to persuade the reader about the importance of preserving mountain regions by discouraging ridgetop development. The writer expresses their opinion on the issue and supports it with reasons and evidence.
The essay falls under the category of a persuasive essay, as its main objective is to convince the audience to take action or support a specific viewpoint. The author emphasizes the unique beauty of mountain regions and the need to preserve them for future generations. They argue against ridgetop development by highlighting the negative consequences it has on scenic views and the tourism industry.Additionally, the detrimental environmental impact of stripping large areas and increasing erosion is discussed.Overall, the essay combines persuasive techniques, such as presenting arguments, providing evidence, and appealing to the reader's emotions, to advocate for the preservation of mountain regions and discourage ridgetop development.
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PLEASE HELP TAKING TEST NOW!!!!!!!!!!!!!! What is the main factor causing the salinity of the Everglades to change? (1 point)
O snake populations
O flood control levees
O climate change
O transportation canals
Answers
Answer: snake populations
Explanation:
How can embryos be more useful than adults to show evolutionary relationships among organisms?
Select one:
Related organisms always appear identical in embryonic stages.
Adults may have mutations that are not found in embryos.
Evolutionary relationships are more easily observed in more simple organisms.
Features found in embryos may not be found in adults.
Answers
Answer:
Related organisms always appear identical in embryonic stages.
Explanation:
Embryos of organisms that have a closer genetic relationship to one another tend to look similar for a longer period of time since they share a more recent common ancestor. Thus, embryology is frequently used as evidence of the theory of evolution and the radiation of species from a common ancestor.
The question as shown in the photo
Answers
Answer:
its the first one
Explanation:
Though it occurs naturally in lakes, human activities can increase
A the water table
B eutrophication
C tributaries
D reservoirs
Answers
Human activities can increase eutrophication. Option B
What is known as eutrophication?The process through which a body of water, such as a lake or river, gets enriched with nutrients, mainly nitrogen and phosphorus, is what is called eutrophication.
This water enrichmnt can be caused by natural or human activities like agriculture, wastewater treatment plant discharge, or air pollution from fossil fuels
Eutrophication can affect aquatic ecosystems negativly. This can lead to loss of biodiversity, or evn changes in the food web. It is also known to reduced recreational and beauty of of our water bodies.
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A heterozygous brown eyed (B) woman marries a blue eyed man (b) the woman is extreme nearsightedness A condition that required her to wear glasses
Answers
Assuming complete dominance for both genes, the parents genotypes are bbEe and Bbee. Among the offpring, the Expected genotypes are: 1/4 BbEe, 1/4 Bbee, 1/4 bbEe, 1/4 bbee. And the Expected phenotypes are: 1/4 brown eyes and normal vision, 1/4 brown eyes and express extremenearsightedness, 1/4 blue eyes and normal vision, 1/4 blue eyes and express extremenearsightedness.
What is complete dominance?Complete dominance is the inheritance pattern in which the dominant allele can hide the expression of the recessive allele when both of them are together in heterozygous individuals. In these cases, only the dominant phenotype can be expressed.
In the exposed example, we will assume complete dominance for both genes.
Gene for eye color
B is the dominant allele that codes for brownb is the recessive allele that codes for blueGene for extremenearsightedness
E is the dominant allele that codes for normal sighte is the recessive allele that codes for the extremenearsightednessAvailable data:
Man:- blue eyed (bb)
- normal vision (E-)
- his mother was affected (ee)
The fact that his mother was affected suggests the man is heterozygous because he received one recessive allele from his mother. So he has normal vision but is heterozygous for the trait, Ee.
Woman:- Brown eyes Bb
- Affected by extremenearsightedness, ee.
Man and woman's Genotypes
Man ⇒ bb Ee (blue eyes and heterozygous for normal sight)Woman ⇒ Bb ee (heterozygous for brown eyes and with extremenearsightedness)Cross: blue-eyed man with normal vision with and affected brown-eyed woman
Parentals) bbEe x Bbee
Gametes) bE bE be be
Be Be be be
Punnett square) bE bE be be
Be BbEe BbEe Bbee Bbee
Be BbEe BbEe Bbee Bbee
be bbEe bbEe bbee bbee
be bbEe bbEe bbee bbee
F1) Genotypes
4/16 = 1/4 = 25% of the progeny is expected to be dihybrid, BbEe
4/16 = 1/4 = 25% of the progeny is expected to be Bbee
4/16 = 1/4 = 25% of the progeny is expected to be bbEe
4/16 = 1/4 = 25% of the progeny is expected to be bbee
Phenotype
4/16 = 1/4 = 25% of the progeny is expected to have brown eyes (Bb) and normal vision (Ee)4/16 = 1/4 = 25% of the progeny is expected to have brown eyes (Bb) and express extremenearsightedness (ee)4/16 = 1/4 = 25% of the progeny is expected to have blue eyes (bb) and normal vision (Ee)4/16 = 1/4 = 25% of the progeny is expected to habe blue eyes (bb) and express extremenearsightedness (ee)Parents genotypes: bbEe and Bbee
Expected genotype: 1/4 BbEe, 1/4 Bbee, 1/4 bbEe, 1/4 bbee
Expected phenotype: 14 brown eyes (Bb) and normal vision (Ee), 1/4 brown eyes (Bb) and express extremenearsightedness (ee), 1/4 blue eyes (bb) and normal vision (Ee), 1/4 blue eyes (bb) and express extremenearsightedness (ee).
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Complete question:
A heterozygous brown eyed (B) woman marries a blue eyed (b) man.The woman has extremenearsightedness, a condition that required her to wear glasses at a very young age.
Nearsightedness is recessive.
The man has normal vision, but his mother had extremenear-sightedness.
Determine the parents’ genotypes. Then, show the Punnett square
How long after conception does the new human develop different cell types?
Answers
The first 12 hours after conception, the fertilized egg remains a single cell. After 30 hours or so, it divides from one cell into two. Some 15 hours later, the two cells divide to become four. And at the end of 3 days, the fertilized egg cell has become a berry-like structure made up of 16 cells.
Why does natural selection occur more when there is competition for resources?
Answers
Natural selection occurs more prominently when there is competition for resources because competition creates selective pressures that drive adaptations and favor certain traits over others.
In any given environment, resources necessary for survival and reproduction, such as food, water, and shelter, are limited. As a result, individuals within a population must compete with one another to obtain these resources.
Competition leads to differential survival and reproductive success among individuals.
Those individuals with advantageous traits or variations that enable them to more effectively acquire and utilize resources have a higher likelihood of survival and producing offspring.
These advantageous traits can be physical characteristics, physiological adaptations, or behavioral strategies that provide a competitive edge.
Through natural selection, individuals possessing beneficial traits are more likely to pass on their genes to the next generation, while individuals with less favorable traits are at a disadvantage.
Over time, this process results in the accumulation of beneficial traits within the population, enhancing their overall fitness and adaptation to the specific environment.
Therefore, competition for resources acts as a driving force for natural selection by selecting for traits that enhance an individual's ability to secure limited resources, survive, and reproduce successfully.
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Inside a cell, there are 30 sodium ions and 20 potassium ions. If the sodium-potassium pump uses two molecules of
ATP, determine how many ions of sodium and potassium will be left inside the cell. Explain your reasoning.
Answers
After the sodium-potassium pump uses two molecules of ATP, there will be 28 sodium ions and 22 potassium ions left inside the cell.
There were 30 sodium ions and 20 potassium ions inside the cell. With the help of the sodium-potassium pump, two cycles of ion exchange can occur, utilizing two molecules of ATP. In the first cycle, three sodium ions are transported out of the cell, and two potassium ions are transported into the cell. As a result, the number of sodium ions decreases by three to 27, and the number of potassium ions increases by two to 22.
In the second cycle, another three sodium ions are transported out of the cell, and two potassium ions are transported into the cell, which results in 24 sodium ions and 24 potassium ions. However, the total number of ions inside the cell is still 48, which is not the same as the initial number. Therefore, one more cycle is required, resulting in 28 sodium ions and 26 potassium ions inside the cell.
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What is a tree that produces cones called?
Answers
Answer:
Gymnosperms
Explanation:
Plants w/ cones
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YOU HAVE 5 MINUTES!!!!
Design an easy do-it-yourself compost bin that can be put (exnfe ffpao)
together at home. You can describe it, draw and label it, or both!
Include the following in your design:
• drawing or description of design
• materials used for the bin
• size of the bin
• substances used to fill it
• household items that can go in it
• how long it takes before it is ready
• how you use the compost
2)
Compost bin design: Add these household items to
your compost bin:
Compost is ready to use in this
much time:
Use your compost this way:
Answers
A description of the compost bin that can be used for this experiment is that the bin is a rectangle-shaped container that is made of wood. This container is 150 cm wide and 30 cm deep. It can hold up decaying materials for up to one month.
How to use the compostThe compost can be used to store decaying materials that will be used in a nearby farm for manure. Composting is the act of storing up decomposable materials that remain in a container until they are ready for use.
The compost so obtained can be used to improve the fertility of the soil where crops will be planted.
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Meiosis and mitosis differences and similarities
Answers
Answer:
A. Similarities between mitosis and meiosis include:
both are processes of cell division or the creation of daughter cells from a parent cell
both go through the phases: prophase, metaphase, anaphase, and telophase and cytokinesis
both use most of the same machinery of cell division including centrosomes, spindle fibers, etc.
B. Differences between mitosis and meiosis include:
Meiosis is used in sexual reproduction to make four haploid (n) daughter cells from one parent cell.
Mitosis is used for growth, replacing old cells, and asexual reproduction. One parent cell makes more
Meiosis happens in two stages, or two rounds of division, known as meiosis I and meiosis II. Mitosis only involves one round of division, or division of the cytoplasm.
During meiosis, crossing over occurs, which increases the genetic variation of gametes. This does not happen in mitosis.
Winds curve as they blow due to
Answers
Answer:
lack of pressure difference between regions
Answer:
C
Explanation:
Wins curve due to the lack of pressure differences between regions
how do i do these? please help this is due today :)
Answers
Answer:
just look up the meaning of heterozygous anywho for 7 the answer is the leaf will be wrinkled and so will number 8 i think...it needs a coma.
Explanation:
the meaning of heterozygous is its the opposite of what it is
Related to weather what does 0% cloud cover mean?
Answers
Answer: 0% cloud coverage means there are no clouds in the sky and it is a clear day.
Explanation: Cloud cover mean how much cloud coverage and 0% means nothing at all is covered.
How does photosynthesis contribute to the organism’s energy needs
Answers
Answer:
Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules. The energy used to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as cellular respiration.
Explanation:
Lab Intro - The Metric System
Exercise A - Measurement or distance
Someone help please
Answers
The metric system is a system of measurement that is utilized throughout the world. The fundamental units of the metric system are meter, gram, and liter. In this system, prefixes are used to represent measurements that are bigger or smaller than the fundamental units.
The prefix “kilo-,” for example, indicates a measurement that is a thousand times bigger than the fundamental unit. Lab Intro - The Metric System Exercise A - Measurement or Distance The metric system is used to measure length or distance.
The standard unit of length in the metric system is the meter, which is represented by the symbol “m.” The metric system is used to measure distances or lengths that vary from millimeters (mm) to kilometers (km).In order to determine measurements in the metric system, the fundamental units are combined with prefixes.
For example, one centimeter (cm) is equal to 1/100th of a meter, while one millimeter (mm) is equal to 1/1000th of a meter. One kilometer (km), on the other hand, is equal to a thousand meters (m).
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Choose only one correct option. Explanation needed.
Answers
Answer: D
only green plants
Answer:
\(\large \boxed{\mathrm{D. \ Photosynthesis}}\)
Explanation:
Photosynthesis is a characteristic present in plants. Photosynthesis is a process where plants transform light energy into chemical energy. Reproduction, respiration, and excretion are all characteristics of living organisms.
all the elements in the same group have the same…?
Answers
Answer:
A. Valence electrons
The elements in each group have the same number amount of valence electrons
Question 5 of 25
Which measurements could create more than one triangle?
A. Sides measuring 3 cm, 8 cm, and 15 cm
B. Sides measuring 10 cm and 20 cm and an included angle
measuring 50°
C. Angles measuring 100°, 10°, and 70°
D. Angles measuring 110°, 40°, and 40°
SUBMIT
Answers
The measurements that could create more than one triangle are options C and option D.
Explanation: For a triangle to exist, the sum of any two sides of a triangle must be greater than the length of the third side.
In option C, the angles measuring 100°, 10°, and 70° do not satisfy this condition, as the sum of the angles 10° and 70° is less than 100°, making it impossible to form a triangle. However, by rearranging the angles, such as 10°, 70°, and 100°, we can create a valid triangle.
In option D, the angles measuring 110°, 40°, and 40° also violate the condition for a triangle, as the sum of the angles 40° and 40° is less than 110°. However, by rearranging the angles, such as 40°, 40°, and 110°, we can create a valid triangle.
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Cross a YyLl (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits). Look at the number of genotypes of the F1 generation:
YyLl: 400
Yyll: 100
yyLl: 100
yyll: 400
1. Which offspring are the recombinant offspring in this cross?
Answers
The parents here are YyLl (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits). The recombinant species are yyLl: 100 and Yyll: 100.
What is the dominant and recessive genotype ?The genetic expression that expresses itself are the genetic traits that get expressed in the individual whereas the one that do not are called as recessive genotype.
Here, YyLl is the heterozygous dominant species where Y represents the dominant trait over y and T represents the dominant trait over t. The traits are presented both as dominant and the recessive parents is yytt.
Recombinant species will show traits that are both mixed where the heterozygous dominant and the recessive traits gene will express itself and these are Yyll: 100 and yyLl: 100.
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Describe how the particles will diffuse across the membrane in figure 3
Answers
Osmosis, active transport and passive transport are the three ways or methods which is used by the particles to go into or out from the cell membrane.
Describe how the particles will diffuse across the membrane?
In facilitated diffusion, molecules diffuse throughout the plasma membrane with help from membrane proteins, consisting of channels and vendors. A concentration gradient exists for these molecules, so they have the capability to diffuse into (or out of) the cellular by using shifting down it.
The method which is used by the particles to move from the cell membrane are Osmosis, Active transport and Passive transport. So these are the three ways or paths which are used by the particles to move into or out from the cell membrane.
So we can conclude that osmosis, active transport and passive transport are the three ways or methods which is used by the particles to go into or out from the cell membrane.
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Use the drop-down menus to identify each type of galaxy pictured.
Answers
Answer:
A- Elliptical
B-Irregular
C- Spiral
HELP ASAP!!!!!! NO LINKS!!!! THIS IS FOR 48 POINTS, IF RIGHT THEN POSSIBLY BRAINLIEST
Drag each label to the correct image.
Name and describe each star phase.
Answers
Answer:
Top left: Black hole
Bottom left: white dwarf
Explanation: Im 80% sure
HELP PLZ ASAP GIVING BRAINLIEST!!
Answers
Answer:
I think D. Loss of Wildlife may be correct
Explanation:
Can I have 1 male and 2 female mice together? Want to make sure nothing will happen.
Answers
Answer: they will work together as long as you don't try to force reproduction
Explanation:
All EXCEPT which of the following are associated with the endomembrane system?
A) impulses B) nuclear envelope C) eukaryotic cell D) membranes suspended in cytoplasm
Answers
Answer:
A) impulsos
Explanation:
Please leave your crown
Which hypothesis is supported by the data?
A. The milkweed population is a biotic factor that decreaded as amount of sunlight an abiotic factor increased.
B. The milkweed population is an abiotic factor that decreased as the amount of sunlight a biotic factor decreased.
C. The milkweed population is an abiotic factor that decreased as the amount of sunlight a biotic factor increased.
D. The milkweed population is a biotic factor that decreased as the amount of sunlight an abiotic factor decreased.
Answers
The Institutional Review Board 1) Reviews only studies in animals 2) Reviews clinical studies (in humans) 3) Is constituted by the drug company to assure the safety of the investigational drug 4) Assures investigators do not have conflicts of interest
A. "1,2 and 3 are correct"
B. 1 and 3 are correct
C. 2 and 4 are correct
D. ONLY 4 is correct
E. ALL are correct
Answers
Answer:
C. 2 and 4 are correct
Explanation:
Institutional review board protects the rights of human research.
They are involved with reviewing of all research that involves the use of humans before it is conducted and protect the welfare of the human involve and the privacy.
The member of the board must be 5 and above and it include people from different fields that are knowledgeable and will provide findings on human research. A non scientist is also involve and someone from other field.
2 and 4 is correct
A crane has a sharp and pointed beak while the duck has a flat beak.Explain why
Answers
Answer:
The crane has a sharp and pointed beak adapted for catching and grasping prey. The sharp beak allows the crane to effectively stab and pierce its prey, such as fish, frogs, or small animals. The pointed shape helps the crane to accurately target its prey and secure a firm grip.
On the other hand, the duck has a flat beak, which is better suited for its specific feeding habits. Ducks are primarily filter feeders, and their flat beak enables them to sift through water or mud to collect small organisms, insects, and plants. The flat beak acts like a sieve, allowing the duck to strain out food particles while retaining water.
The difference in beak shape between the crane and the duck reflects their distinct feeding strategies and ecological roles. Each species has evolved its beak shape to optimize its ability to capture and consume the specific types of food sources available in their respective habitats.