Answer:
Allele is the different version of the same gene. Mostly one gene contains two alleles for a trait for example gene for flower color have two alleles R (for red flower) and r(for white flower) so only these two color can be seen in phenotype.
So if a plant species have only two allele for leaf color it can express only either of two color in its leaf but if a species contains more than two alleles for leaf color that the leaf can express any of color out of them.
Therefore species B will differ in appearance because it can express four-color due to having four alleles for leaf color but other species having only two alleles can express only two color.
Trilobites are index fossils because they ____.
a.
changed slowly through time
c.
exhibit specific characteristics
b.
lived over large areas of the world
d.
all of the above
Answer:
d. all of the above
Explanation:
Trilobites are an extinct class of marine arthropods, having been one of the most frequent fossil groups in the period between the Cambric and the Devonian, and are at this time still quite biologically diverse. Trilobite fossils are considered index fossils because they change slowly over time, exhibit specific characteristics and have lived in large areas of the world.
Index fossils refer to an organism that has had a wide geographical distribution in the past, although it has lived for short periods of time, and whose remains have not only been conserved in abundance but are also easy to identify.
Cigarette smoke can affect cell differentiation during embryo development. Which would be the most likely effect of cigarette smoke?
it can cause childhood asthma....
Cars with hybrid and electric motors ____ ?
a. Are no longer produced
b. Use solar panels for power
c. Creates less air pollution than conventional cars
d. Use more fuel than conventional cars
State one possible reason why a gene for the production of a human hormones would be placed in bacterial DNA
A gene for human hormone production might be inserted into bacterial DNA to facilitate the large-scale, industrial manufacture of hormones such as insulin and human growth hormone using recombinant DNA technology, avoiding allergic reactions from animal-sourced hormones.
One possible reason why a gene for the production of a human hormone would be placed in bacterial DNA is to manufacture the hormone on an industrial scale using recombinant DNA technology. This process has been used successfully as early as 1978 to produce human insulin, which is critical for treating diabetic patients. Using Escherichia coli (E. coli) bacteria as hosts, the human hormone genes, such as the one for insulin or human growth hormone (HGH), are inserted into the bacterial DNA, enabling bacteria to produce these hormones. This method eliminates allergic reactions that some patients experience when treated with hormones obtained from animals, such as pig insulin, and it allows for the mass production of hormones that are identical to those naturally produced by the human body.
pioneer plant species can be described as those that
Answer:
Pioneer plant A plant that occurs early in a vegetational succession. Pioneer species possess characters that suit them to their ecological niches, notably rapid growth, the production of copious, small, easily dispersed seed, and the ability to germinate and establish themselves on open sites.
Explanation:
What is a legal document issued by a government that gives an inventor exclusive rights to make use or sell an invention for limited time
The finding that ___ can cause channel-swapping is consistent with early filter theories of auditory attentional selection.
Final answer:
Motivation can cause channel-swapping, consistent with early filter theories of auditory attentional selection and evidenced by signal detection theory and synaptic plasticity influencing perception.
Explanation:
The finding that motivation can cause channel-swapping is consistent with early filter theories of auditory attentional selection. Motivation influences our perception, such as when expecting an important phone call while showering and thinking we hear the phone when it's not actually ringing.
This phenomenon is an example of signal detection theory, which helps explain our ability to discern a meaningful stimulus amidst noise. Furthermore, the connections between neurons on both sides of the brain enable us to detect slight differences in sound stimuli, aiding in auditory discrimination.
Another key aspect is synaptic plasticity, which allows the brain to integrate and respond to new information, as seen in experiments with auditory tones and foot shocks.
External sounds that are significant, like the crashing of dishes, can penetrate our attentional filters due to the bottom-up attentional capture mechanism. All of these principles contribute to our understanding of how attention and perception work in conjunction with auditory stimuli.
In medicine, why do you think it is important that re-evaluation is part of the scientific process?
Match the following terms and definitions. 1. transcription the transfer of genetic code from DNA to an RNA molecule 2. translation the breeding of two organisms which differ in a single trait 3. monohybrid cross converting the genetic code into the language of proteins 4. incomplete dominance when genes are neither dominant nor recessive and display a blending of traits in the phenotype 5. sex-linked genes genes that are carried on the X chromosome NEXT
Answer:
The correct term matching to its definition is given below:
Explanation:
1. Transcription : the transfer of genetic code from DNA to an RNA.
2. Monohybrid cross: the breeding of two organisms which differ in a single trait.
3. Translation: converting the genetic code into the language of proteins.
4. Incomplete dominance : when genes are neither dominant nor recessive and display a blending of traits in the phenotype
5. Sex-linked genes: genes that are carried on the X chromosome
Slopes that drop or rise sharply in elevation are:
Steep slopes are geographical features that rise or drop significantly in elevation over a short distance. Examples are found in mountainous areas or cliffs by the sea.
Explanation:Slopes that drop or rise sharply in elevation are commonly referred to as steep slopes. These geographical features are characterized by an abrupt change in altitude, with the land rising or falling significantly over a short distance. Steep slopes occur naturally in mountainous or hilly areas. A cliff by the sea, or the side of a mountain range, are good examples of this geographical feature. They're significant because they influence elements like climate, vegetation, and human habitation, as living or farming on a steep slope can be challenging.
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Steep slopes, in mathematical terms, are represented by a plate with a high positive or negative slope. In geographical context, these are typically found in mountain areas where erosion forms sharply rising or falling landscapes.
Explanation:Slopes that drop or rise sharply in elevation are referred as steep slopes. In the context of a graph or a line in mathematics, these are represented by lines with a high positive or negative slope. The slope is defined by how much y (vertical distance) changes for each unit of x (horizontal distance) or 'rise over run'.
In geographical terms, steep slopes are commonly found in mountain ranges, where erosion by water and ice create sharp peaks and serrated edges. For example, a mountain formed by upthrusting of the crust will have its rocks subject to erosion, resulting in a steep slope. These are visibly different to the smooth, dull slopes found on non-eroded surfaces such as those found on the Moon or Mercury.
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What is the purpose of the biogeochemical cycles?
-to cycle energy through a food chain
-to recycle matter through the biosphere
-to recycle rocks through the layers of Earth
-to cycle nutrients through the human body
Answer:
B
Explanation:
Tina has a history of asthma. what sounds might you hear during an asthma exacerbation?
Final answer:
During an asthma exacerbation, wheezing and possibly crackling sounds may be heard, along with decreased breath sounds if the attack is severe.
Explanation:
These sounds include wheezing, which is a high-pitched whistling sound caused by the restriction of airflow, and is most pronounced when exhaling.
Additionally, during more severe attacks, a health professional might hear decreased breath sounds due to reduced air movement within the lungs. In some cases, a crackling sound can be heard, suggesting the presence of mucus in the airways. It is also possible to encounter signs of increased work of breathing such as the use of accessory muscles during respiration.
Asthma is a chronic respiratory condition where the airway passages narrow and are often accompanied by excessive mucus production, leading to symptoms such as difficulty breathing, coughing, and chest tightness. Triggers like allergens, air pollution, infections, and exercise can provoke these asthma attacks.
Prompt and proper management of an asthma attack, especially if presenting severe symptoms such as cyanotic lips or confusion, is imperative for an asthmatic individual, and may involve the use of fast-acting medications like bronchodilators.
Why did early naturalists think that sponges were plants and not animals?
Communication between members of the same species is referred to as _______ communication.
A. interspecific
C. innate
B. intraspecific
D. intention
What is a politician consequences of not using your critical thinking skills throughout life ?
If a cell were treated with a poison to block to function of its mitochondria, which of the following would be the likely result?
Why are a bacteria a necessary part of nitrogen cycle?
One of the hallmarks of community health promotion is its emphasis on improving
What is the main purpose of creating a family health tree?
Frank performs a contract with gene to add a garage to gene’s property, but gene does not pay. frank can file a lien on gene’s property if, from the last date labor or materials were provided, he acts
With the given scenario above, Frank can file a lien on the property of Gene from the beginning last date labor or the materials that were provided, he can act within the days of sixty up until one hundred twenty days.
If receptors in muscle fibers are thought of as locks, the keys are:
Why does fast-moving water lead to greater erosion than slow-moving water?
It has more energy.
It usually flows in a straight line.
It evaporates faster.
The particles it carries are smaller.
During the first cycle of the natural sleep cycle. REM sleep lasts for about how long?
During the first cycle of the natural sleep cycle, REM sleep usually lasts for about 10 minutes. It is characterized by rapid eye movements, high brain activity, and a lack of muscle tone. The duration of REM sleep increases with each sleep cycle throughout the night.
Explanation:The question is asking about the duration of REM sleep during the first cycle of the natural sleep cycle. To answer this question, we first need to understand what REM sleep is. REM, or Rapid Eye Movement sleep, is a phase of the natural sleep cycle characterized by rapid movements of the eyes, high brain activity, and a lack of muscle tone. This is often the stage in which dreaming occurs.
The duration of REM sleep changes throughout the night, with each sleep cycle. During the first sleep cycle, REM sleep typically lasts for about 10 minutes. However, as the night progresses, the length of each REM stage can increase, with the final REM stage of the night potentially lasting up to an hour.
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Which of the following is the best example of a positive correlation
Your chances of getting an A increase as the difficulty of the test decreases. Hence the correct option is b.
A positive correlation implies that as one variable increases, the other variable also increases. In the provided example, the statement "Your chances of getting an A increase as the difficulty of the test decreases" exemplifies a positive correlation. This suggests that when the difficulty level of a test decreases, the likelihood of achieving an A grade increases.
As the complexity of the test diminishes, students are more likely to perform well, leading to higher grades. This positive relationship between the ease of the test and the likelihood of obtaining an A aligns with the concept of a positive correlation, where the variables move in the same direction, reinforcing the idea that easier tests are associated with higher grades. Hence the correct option is b.
Complete question:
Which of the following is the best example of a positive correlation? Multiple Choice
The less interesting the lecture, the less likely you are to remember everything the instructor said. Your chances of getting an A increase as the difficulty of the test decreases. Alicia loves to eat ice cream on hot afternoons. You should study longer because that helps you get a better grade.An enveloped virus is dependent on the envelope for its ability to infect a host cell. Which virus most likely uses this mechanism?
Answer:
HIV
Explanation:
HIV is a retrovirus, is an enveloped virus classified in the Lentiviridae subfamily and is a sexually transmitted infection. This virus infects a host cell by attacking the immune system, which is responsible for defending the body from disease. The most affected cells are CD4 + T lymphocytes. The virus is capable of altering the DNA of this cell and making copies of itself. After multiplying, it breaks the lymphocytes in search of others to continue the infection.
After staining endospores will be ___ in a ____ cell
After staining endospores will be green in a parent cell. Staining endospore is difficult as the bacteria do not allow stains to be attach to the spore. This is why there is a need to use heat to let the main stain which is Malachite green into the endospore.
List and define major chemical bonds used to connect biological molecules
A single layer of irregularly shaped epithelial cells found lining the respiratory tract is called
how is telomerase activity different from DNA polymerase activity during DNA elongation?
Which bonds are hydrolyzed during the breakdown of starch during digestion?
A.) 1 and 4
B.) 1 and 3
C.) 1 and 2
D.) 3 and 4
E.) 2 and 3
Answer:
The correct answer is A.) 1 and 4
Explanation:
Starch is the branched polymer made up of units of D- glucose. It contains amylopectin and amylose. They are found in plants and store glucose for energy in plants.
Amylose is made up of unbranched polymer of α-D-glucose residue joined together by α1-4 glycosidic bond and amylopectin is also made up of α-D-glucose units joined together by α1-4 glycosidic bond but it is a branched polymer with α1-6 branching point after some glucose residues.
So α- amylase is the enzyme that breaks down the α1-4 glycosidic linkage between two glucose units of starch to produce glucose and maltose residues. So the correct answer is A.) 1 and 4.