Answer:
HIV may not cause symptoms early on. People who do have symptoms may mistake them for the flu or monoSkin rash.
Symptoms may appear from a few days to several weeks after a person is first infected. The early symptoms usually go away within 2 to 3 weeks.
HIV (human immunodeficiency virus) is a virus that attacks the immune system
There are two types of HIV:
HIV-1, which causes almost all the cases of AIDS worldwide
HIV-2, which causes an AIDS-like illness. HIV-2 infection is uncommon in North America.
Explanation:
Which process is the main source of this movement?
Answer: hitting the energy from the sun
Explanation:
Answer:b
Explanation:movement ocean
Explain how an ecosystem that has experienced a disruptive event, such as a volcano, recovers. Read More >>
An ecosystem that has experienced a disruptive event, such as a volcanic eruption, will take time to recover from the effects of the disruption. The recovery process of an ecosystem is a complex, interconnected process between the biotic and abiotic components of a system. The recovery process that follows a disturbance varies depending on the type of disruption and the environment in which it occurs.
When a volcanic eruption occurs, it can release a great deal of ash and debris into the environment, and the effects can be devastating. The ash and debris can severely damage the terrestrial and aquatic ecosystems in the surrounding area, resulting in a loss of habitat, food sources, and other important resources. Additionally, the ash and debris can block sunlight and reduce photosynthesis, which can lead to a decrease in plant growth and a disruption of the food web.
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Drag each label to the correct location.
Geologists study a variety of other characteristics to identify minerals, such as texture, magnetism, streak plate markings, density, and specific gravity. Use the information you have already gathered, in addition to a few other properties of minerals, to identify the seven minerals in the chart below. If you need help using the graduated cylinder or scale, consult the lab instruments and measurements guide. If you do not have access to the seven minerals given, use this resource to complete the chart.
Answer:
quartz gypsum pyrite magnetite graphite fluorite talc
Explanation:
A botanist crosses two pink-flowered plants. The cross is a case of intermediate inheritance that involves alleles that were not clearly dominant or recessive and could make red-, pink-, and white-flowered plants. If four plants are produced from the cross, what is the expected number of white-flowered plants?
A-1
B-0
C-3
D-2
Explain how abiotic factors can have influence on the survival for individuals through natural selection.
Selection: Organisms live within ecosystems, which are made up of various biotic and abiotic factors. These factors contribute to selecting which variations provide the individual with an increased chance of surviving. ... Examples of abiotic factors include temperature, shelter, sunlight, water and nutrients.
Answer:
Biotic and abiotic factors are the environmental conditions that the organisms have to face to live in a specified environment.
Abiotic factors
Abiotic factors are the physical and chemical conditions of an environment. For example : heat, salinity, pressure, light, wind, pH ...
Biotic factors
Biotic factors are all the biological conditions of an environment for a specie/taxa. It can include prey and predator abundance, available food amount, available space, intra and interspecific competition...
The development of organims is under the control of abiotic factors. Some are adapted to heat, cold etc ... The abiotic factors will define which organisms are able or not to live in a specified place.
The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment.
So, the abiotic factors are controling the biotic factors of an environment.
Please mark me as brainliestAt what heart rate should you start compressions on a newborn?
The current neonatal resuscitation guidelines recommend to start chest compression in a newborn infant if the heart rate remains <60 beats per minute despite adequate ventilation for 60 s .
A small percentage (less than 10%) of newborn babies need active resuscitative measures in order to establish a loud cry or consistent breathing, keep their heart rates over 100 beats per minute (bpm), and acquire acceptable color and tone.
The establishment of proper ventilation has to be your top priority. If stimulation does not result in the prompt commencement of spontaneous respirations or the heart rate is below 100 bpm, give assisted ventilation while paying close attention to oxygen delivery, inspiratory time, and effectiveness as determined by chest rise.
To obtain roughly 90 compressions and 30 breaths per minute, time chest compressions with ventilations at a 3:1 ratio at a rate of 120 events per minute. If the heart rate is below 60 beats per minute after 30 seconds of efficient aided breathing and circulation, provide epinephrine (chest compressions).
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Why are identical twins rare?
Word Bank:
gene, chromosome, reproductive cell, identical twin, fraternal twin, trait, protein, variation.
Mention:
Explain how genes are passed on normally in humans.
Explain how genes are passed on in identical twins.
Explain why identical twins are rare.
Identical twins are rare because they are generated when a fertilized egg is divided into two zygotes and thus generate two different organisms having genetically identical material. Genes are passed on normally in humans due to the inheritance from parents to offspring, they (genes) are passed on in identical twins as copies in the egg cell.
What is the proportion of identical twins in nature?The proportion of identical twins in nature is relatively low in the order of 1 to 250, which inherit the same genes contained in homologous pairs of chromosomes, while fraternal twins denote the process of fertilization of two separate eggs to form different organisms. These genes generate different proteins that will lead to different traits.
Therefore, with this data, we can see that the proportion of identical twins in nature is low because the division of the egg cell after fertilization cell is a rare process.
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Mucous secretions in the respiratory tract inhibit microbial infections. These secretions are produced by which of the following tissue types found in the lungs ?
A. Epithelial
B. Glomerulus
Option A: Epithelial tissue types found in the lungs are responsible for mucous secretion in the lungs.
About 30% of the respiratory epithelium's total cell population are goblet cells. They create mucinogen, which when released into an aqueous environment becomes hydrated and is known as mucin. As soon as the mucin is combined with additional components in the wet environment, it is referred to as mucus. Thus, option A is the appropriate choice.
The first line of defense against the onslaught of irritants that 500 L of air an hour of air inhalation puts into the lungs is mucus secretion. The airway epithelium can be harmed by the gases, microorganisms, soot, and dust that are inhaled. As a result, mucus secretion happens extraordinarily quickly—in only a few milliseconds.
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What happens when we increase the number of cells?
When we increase the number of cells, we are increasing the total number of individual organisms in a larger system. This can have a wide range of effects, depending on the type of organism and the environment that it is in.
In the case of a single-celled organism, such as a bacterium or a protozoan, an increase in cell numbers will likely result in an increase in population size. As the population size grows, the organism’s ability to access resources, such as food and shelter, may become limited. The organism may also become more prone to competition with other species in the same environment, which could result in a decrease in overall fitness of the population. The organism may also become more vulnerable to disease and predation, as the overall population becomes more concentrated.
In the case of a multicellular organism, such as a plant or an animal, an increase in cell numbers can have a variety of effects. This can include increased strength and size, as well as the ability to perform complex functions. For example, an increase in the number of cells in a muscle can lead to increased muscle strength and size, allowing for greater physical activity. Likewise, an increase in the number of neurons in the brain can lead to improved cognitive abilities, allowing for more complex problem solving and decision making.
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What is an example of a behavioral adaptation in animals?
Explanation:
Behavioral adaptation is something an animal does usually in response to some sort of external stimulus in order to survive. Hibernating during winter is an example of a behavioral adaptation,this is common among bears.
Alleles are different versions of:
Genotypes
Genes
Chromosomes
Phenotypes
Answer:
Genes
Explanation:
How did Mendel's pea plants help us understand genetics?
Mendel's pea plants gave us a clear and straightforward framework for analyzing the inheritance of traits, which improved our understanding of genetics. Pea plants are a good choice for Mendel's research because they can easily self- or cross-fertilize and have a short generation time.
Mendel exploited the distinct and readily observable traits of pea plants in his tests, including seed color, seed shape, and bloom color.
According to Mendel's research, traits are influenced by specific "factors" that are passed from parent to child. He discovered that the presence of two alleles, one inherited from each parent, determines the inheritance of each feature and that one allele can be dominant over the other.
He also discovered that different characteristics are inherited independently of one another and that the probability of an offspring inheriting a specific allele from a parent is 50%. These discoveries laid the foundation for the field of genetics and provided a framework for understanding how traits are passed down from one generation to the next.
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What is a meter stick used for in biology?
A meter stick is a basic tool used in biology that is used to measure length, width and/or depth of biological specimens.
The meter stick is usually made of wood, plastic, or metal and is marked in metric units, with each centimeter being equivalent to one millimeter. The meter stick is an important tool for a variety of biological applications, such as measuring the size of a cell, measuring the distance between two points on a slide, and measuring the size of a specimen.
The meter stick is also used to measure the length of a specimen, such as a plant or animal. This is done by measuring the entire length of the specimen from one end to the other. The meter stick can also be used to measure the width of a specimen, such as a leaf or a flower. In addition, the meter stick can be used to measure the depth of a specimen, such as a pond or a lake.
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Koalas are marsupials that are found in eastern Australia. Although their ancestors lived mostly on the ground,
modern koalas spend most of their time in eucalyptus trees. This is possible because their hands and feet have
strong claws and opposable digits.
What other adaptation could have helped koalas as they evolved from land dwellers to tree dwellers?
Answer:
Fur color that closely matches the eucalyptus bark color
Explanation:
In terms of evolving from land dwellers to tree dwellers, the number of offspring does not matter. Although the ability to run faster is a good evolution for escaping predators, it does not help the koalas evolve to be better tree dwellers (how would you run using only the trees?). Communicating with their peers would be convenient for survival, but it does not help koalas become better tree dwellers. What does help koalas survive better by traveling through the trees is camouflaging with the bark of the tree to hide from predators.
how does your adrenal gland and pineal gland help you maintain homeostasis?
The adrenal gland helps to maintain homeostasis by producing hormones that regulate metabolism, stress response, and other bodily processes.
What exactly is homeostasis?
Homeostasis is the ability of a living organism or system to regulate its internal environment to maintain a stable equilibrium, such as temperature or pH, despite changes in external conditions. It is a crucial factor in allowing organisms to function normally in their environment.
The pineal gland helps to maintain homeostasis by secreting melatonin which helps to regulate the body’s circadian rhythm and helps to regulate sleep and wake cycles. Together, these two glands help to keep the body in a balanced, homeostatic state.
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A student hypothesized that robins prefer large birdhouses to small ones. He build four birdhouses of different sizes to test his hypothesis. What was the independent variable in the students study?
Option a is Correct. According to a student's theory, robins choose large birdhouses over little ones. He constructed four birdhouses of various sizes to test his theory, and the student's study's independent variable (cause) is the size of the birdhouses.
The benefits of including a birdhouse in your garden or yard are endless. Of course, they're beautiful to look at, but they also have a ton of additional features and advantages. one of our preferred ones? Birdhouses give persons who have been uprooted by fast deforestation and urbanization a safe place to live.
Birdhouses help with insect control, weed control, flower pollination, and the upkeep of native flora since they are so enticing to neighborhood birds. In addition, painted birdhouses give outdoor areas personality and depth.
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Correct Question:
A student hypothesized that robins prefer large birdhouses to small ones. He built four birdhouses of different sizes to test his hypothesis. What is the independent variable (cause) in the student's study?
a. the size of the birdhouses
b. the location of the birdhouses
c. the number of birds in the house
d. the season of the year
There is a kind of snake that can be born with red, yellow, or green skin. Eagles hunt these snakes, but snakes that are the same color as their environment are harder for the eagles to see and catch.
Based on the data in Table 1 and the biomass of the very large animals eaten by the lions, predict the likely effect on both the lions and leopards if the availability of the very large animals becomes limiting in the reserve. After analyzing the data, the scientists claim that the leopards and lions coexist in the reserve through the use of niche partitioning. Use evidence from the data provided to support the scientists’ claim.
Answer:
Explanation:
An ecological community can be described as all the different species of organisms i.e all the different plants and animals, living in a particular habitat at a specified time. An ecological community will consist of: Predators: Organisms which feed on other organisms.
Cells actively involved in secreting proteins would contain large numbers or quantities of ________.
Cells producing huge portions of proteins would have numerous nucleoli. One potential explanation that the proteome is such an ample deal bigger than the genome is that mRNAs can be grafted in elective ways in this manner expanding the Digi of items paid from a clear rate.
Ribosomes are especially plentiful in cells that orchestrate a lot of protein. For instance, the pancreas is answerable for making a few stomach-related catalysts and the cells that produce these compounds contain numerous ribosomes.
Cells that successfully produce proteins have various ribosomes in the cytoplasm, which give it a dull blue tone (basophilia) when stained with Wright stain. Cytoplasmic basophilia is especially unmistakable in erythroid forerunner cells when hemoglobin and other cell parts are effectively orchestrated.
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giving a large number of points to whoever answers this
31. The cell membrane is primarily made up of these - E. phospholipids
32. The hydrophilic part of a phospholipid - A. phospholipid head
33. The hydrophobic part of a phospholipid - H. phospholipid tail
34. Protein that facilitates passive transport - D. channel protein
35. Protein that facilitates active transport - J. carrier protein
36. Molecule that stabilizes the membrane - G. cholesterol
37. Molecule that aids in cell recognition and signaling - I. carbohydrate molecule
38. A substance that can undergo facilitated diffusion - C. negatively charged ions
39. A substance that undergoes active transport - F. positively charged ions
40. Cellular energy needed for active transport - B. ATP
What are phospholipids?Phospholipids are the main lipid that is found in the cell membrane.
The structure of phospholipids is that they have a hydrophilic head group and a hydrophobic tail.
They are arranged in the form of bilayers in cell membranes.
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I need help knowing what the independent variable is to this
In an experiment, the independent variable is the color or the wavelength of the light. The dependent variable is the amount of absorption.
What is Blue light therapy?Blue light therapy is also known as photodynamic therapy. It is a type of light treatment that is used to treat diseased or damaged skin. It uses medicines called photosensitizing agents along with specific wavelengths of blue light to destroy abnormal skin cells while leaving the surrounding tissue unharmed.
Is the color of light a dependent variable?In an experiment to determine the absorption of light of different colors, the independent variable is the color or the wavelength of the light. The dependent variable is the amount of absorption. The independent variable is the variable that the experimenter changes on their own.
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Failure of the pituitary to stop producing growth hormone after body growth is completed results in
Answer:
acromegaly
Explanation:
What is the role of nitrogen-fixing organisms?
Answer:
Nitrogen-fixing bacteria, microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen.More than 90 percent of all nitrogen fixation is effected by these organisms, which thus play an important role in the nitrogen cycle.An ice is put in a beaker and left in the sun for long
What with happen to the iceblock?
Answer:
it melts into a liquid form of the substance
How will the positive and negative transcription factor help maintain the homeostasis of the body system. Explain with an example
The positive transcription factor will help in maintaining the stimulus for homeostasis or even accelerate it. Whereas the negative transcription factor will oppose the effect of the stimulus, it can either increase it or decrease it.
Homeostasis is the maintenance of a steady and equilibrated physical, chemical and internal state of the body. The example of positive transcription factor is: activation of one clotting factor in the body initiates a cascade for the activation of all the other clotting factors.
Negative transcription factor has the example of blood glucose levels of the body. If the level increase transcription factors cause the release of insulin from the pancreatic cells to maintain the homeostasis.
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A tumor that can be removed or carved out is part of what type of cancer whats the answer!!! for a test question
Answer:
im not really sure but i think its ovarian cancer if thats in one of your options.. maybe skin cancer if its not in ur options.
Explanation:
What are the 4 most important environmental factors that influence bacterial growth?
The 4 most important environmental factors that influence bacterial growth are oxygen, temperature, water and pH.
Bacteria are unicellular, prokaryotic microorganisms that are able to survive in a lot of different conditions. They have different shapes, different modes of nutrition and lack a nucleus and membrane bound cell organelles.
The four most important environmental factors that influence the growth of bacteria are oxygen, temperature, water and pH. Different types of bacteria types need different temperatures in order to grow. Some can survive in cold temperatures while some can even survive in very high temperatures.
Most of the bacteria survive in neutral or less acidic environments but also a lot of bacteria are able to survive in a very wide spectrum of pH. Some bacteria do not require oxygen and are hence called anaerobic while some type of bacteria need oxygen to grow and are called aerobic. Water is also required by bacteria and it boosts their growth.
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Which species does Lucy belong to ?
One of the most well-known fossilised human ancestor species is known as "Lucy," thus the nickname.
A "funny bone narrative" could be used to describe Lucy's discovery. Johanson found the first piece of Lucy's skeleton at the area of her ulna closest to the elbow when you bump your ulnar nerve in your elbow, it presses against your humerus and gives you that tingly, "funny bone" feeling. Johanson was able to determine from Lucy's shattered ulna's size and shape that it definitely belonged to a primate and might very well be the fossilised remains of a hominin. When Johanson and Gray carefully searched the earth, they were happy to find a great deal more fossilised bone fragments, including pieces of a skull, mandible, ribs, pelvis, thighs, and feet.
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Is calico genetically dominant or recessive?
The calico cat displays a mixture of red- and black-based colors, depending on which of its two X chromosomes has been inactivated. The allele coding for orange hair color is dominant, while the allele for black color is recessive - although this doesn`t matter much since only one allele is expressed.
Because the genetic determination of coat colors in calico cats is linked to the X chromosome, calicoes are nearly always female, with one color linked to the maternal X chromosome and a second color linked to the paternal X chromosome.
To create a calico (or tortoise-shell) pattern, one of the X chromosomes must carry the black gene and the other the orange gene. If a black male and an orange female mate, the result will be a half-black and half-orange female offspring-a calico. A black female and an orange male will also produce a calico female.
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Explain how artificial selection could lead to a change?
Answer:
While artificial selection is certainly a form of experimental evolution, often the meaning of the term 'experimental evolution' is confined to controlled natural selection, excluding artificial selection
Explanation: