The physical gap between two nerve cells across which messages are transmitted is the
All of the following are types of symbiotic relationships except for
A. competitive exclusion.
B. parasitism.
C. commensalism.
D. mutualism.
answer is a
Correct answer: A). Competitive exclusion.
The competitive exclusion principle states that the two species that are competing for the same resources can not live together.
One out of the two competitors will always have an advantage over the other, that leads to the extinction of another species. As a result of that competing species evolve different characteristics in the areas where both of them coexist. Rest all parasitism, mutualism, and commensalism is an example of the symbiotic relationship.
Hence, the correct answer would be option A.
In a population with 2 alleles for a particular locus (D and d), the frequency of the D allele is 0.75.
a) What is the frequency of the d allele?
b) What is the frequency of homozygous dominant individuals in the population?
c) What is the frequency of homozygous recessive individuals in the population?
d) What is the frequency of heterozygotes in the population?
The frequency of the d allele is 0.25. Homozygous dominant individuals have a frequency of 0.5625, homozygous recessive individuals have a frequency of 0.0625, and heterozygous individuals have a frequency of 0.375.
Explanation:In a population with two alleles for a particular locus (D and d), where the frequency of the D allele is 0.75, the frequency of the d allele would be 0.25, since the sum of the frequencies for both alleles must equal 1.0 (p + q = 1).
The frequency of homozygous dominant individuals (DD) in the population would be the square of the frequency of the D allele (p²), which is 0.75² = 0.5625.
Homozygous recessive individuals (dd) would have a frequency equal to the square of the d allele frequency (q²), which is 0.25² = 0.0625.
The frequency of heterozygous individuals (Dd) would be 2 times the frequency of the D allele times the frequency of the d allele (2pq), which is 2 * 0.75 * 0.25 = 0.375.
The most common cause of chronic pelvic pain for women in the prime of their reproductive years is:
The cell membrane regulates the internal environment of the cell by which method
Any energy transformation involves the loss of some energy as what?
In any energy transformation, some energy is lost as heat, which is a concept described by the second law of thermodynamics and is closely related to the increase in entropy, indicating that every energy transfer or transformation is never completely efficient.
Any energy transformation involves the loss of some energy as heat. This principle is encapsulated in the second law of thermodynamics, which states that during any process in which energy changes form, some energy is invariably lost as heat, which is mostly unusable for doing work. For instance, when electrical energy is transformed into light energy in a light bulb, some of the energy is inevitably lost as heat. Similarly, in biological systems such as living cells, some energy is lost as heat during cellular metabolic reactions.
Heat energy is the form that is generated whenever there is friction or resistance during energy transformation, such as when air friction heats molecules due to an airplane's movement. The concept of entropy is closely related, which is a measure of disorder or randomness within a system. As entropy increases, indicating a more disorderly system, the amount of usable energy decreases since higher entropy usually means more energy has dissipated as heat.
How do flowering plants reproduce by fertilization if they are immotile?
1)Fertilization takes place in their roots.
2)They conjugate with plants nearest them.
3)Insects and other organisms carry pollen to other flowers.
The right answer is 3)Insects and other organisms carry pollen to other flowers.
Entomophilia, also called entomophilous fertilization or entomogamy, is a mode of pollination in which insects participate in the transport of pollen, up to the stigma of the pistil in angiosperms and to the egg in gymnosperms.
The pollinating insects most likely to pollinate flowering plants belong to the order Hymemoptera, including bumblebees, osmies and bees raised by beekeepers. But other insects contribute to the multiplication of plants: the fly (Diptera), attracted by the smell of decaying meat it releases, ensures the multiplication of rafflesia.
The wall of the alveolus (air sac) in the lung is composed of which type of epithelium?
Which of the following is a valid concern about the impact of biotechnology on biodiversity? Biotechnology will result in depletion of wild populations because high numbers of organisms will be collected for research. If humans buy only fish produced on aquaculture farms, the fish populations in the wild will decrease. Fish that have been genetically modified will not be able to breed, and species will go extinct. Genetically modified fish could be accidentally released, breed with wild fish, and contribute modified genes to the wild population.
The correct answer is option D
The valid concern of biotechnology on biodiversity is that genetically modified fish could be accidentally released into the environment and those genetically engineered species will breed with the wild type population and the population of modified genes will increase. The concern is true, as if this happens there will be no wild type left in the environment.
Answer:
Genetically modified fish could be accidentally released, breed with wild fish, and contribute modified genes to the wild population.
Explanation:
This is one valid concern that some people express regarding the impact of biotechnology on biodiversity. Biotechnology refers to the modification of natural organisms in ways that are benefitial to humans. For example, these organisms could be more resistant to diseases or be better suited for consumption. However, if the animals were to breed with wild fish, they could contribute modified genes to the wild population, putting it at risk of unwanted modifications and complications.
Which of the following is a key factor that influence BAC A , height B, eating certain foods C, body weight D, all of the above
Eating certain foods, body weight, and height are key factors that influence BAC (blood alcohol concentration).
Explanation:The key factor that influences BAC (blood alcohol concentration) is eating certain foods, body weight, and height. When alcohol is consumed, it is absorbed into the bloodstream and affects the BAC, which is influenced by various factors. For example, someone who weighs more may have a lower BAC after consuming the same amount of alcohol as someone who weighs less.
Although all examples listed below are important considerations for the prevention and spread of disease, which eight (8) times must you wash your hands when caring for children according to maryland regulations
Known to be an integral part of green living inc., rhonda lloyd worked as a renewable energy campaigner for nine years in a remote region of indonesia. what kind of knowledge represents her understanding of the dynamics of village communities and the apprehensions of the locals?
_______ is the science of observing and describing organisms in their environment paired with experimental science.
G the gene shuffling that occurs during meiosis allows two parents to produce genetically diverse offspring. true or false
The statement is true; meiosis allows two parents to produce genetically diverse offspring. This is due to processes like crossing-over and random assortment of chromosomes, resulting in a substantial potential for genetic variation.
Explanation:Genetic Diversity Through MeiosisThe statement that gene shuffling during meiosis allows two parents to produce genetically diverse offspring is true. Sexual reproduction, specifically through the process of meiosis, enables tremendous potential for genetic variation. This diversity arises from multiple mechanisms during meiosis. First, during prophase I of meiosis I, crossing-over between nonsister chromatids of homologous chromosomes generates recombinant chromatids with new combinations of maternal and paternal genes. Another mechanism is the random assortment of chromosomes during metaphase I, which ensures that each gamete receives a unique combination of maternal and paternal chromosomes.
The random orientation of homologous chromosomes creates over 8 million possible combinations for each individual gamete without considering the additional variation from crossover events. These gametes, when united through the process of fertilization, can result in a staggering number of unique genetic combinations between any two people, far surpassing the total human population. The concept of independent assortment, therefore, plays a critical role in contributing to the genetic diversity integral for adaptation and evolution.
A fatty acid that lacks at least one hydrogen along its chain is considered to be
A spore stalk grows from the gametophyte of a moss. What is the next step in its life cycle?
A. gameotophyte
B. Meiosis
C. Gametes
D. Mitosis
Within the vertebrate eye, there is a crystalline protein that is in charge of making fine adjustments in the focus of images on the photosensitive layer. what is the name of this crystalline protein? retina cornea iris lens pupil
Flatworms use a system of canals and tubes with the ______ as their excretory organ.
Damage to the ________ is the most likely explanation for a brain injury that has devastating effects on human action and personality.
Damage to the frontal lobes is the most likely explanation for a brain injury that has devastating effects on human action and personality. Frontal lobes is place at the fore of the brain and it is the enormous of the four major lobes of the cerebral cortex in the mammalian brain.
Answer:
Frontal lobes
Explanation:
The frontal lobe is in the most anterior part of the brain, more precisely occupying the entire cerebral cortex from the central sulcus. It is considered a very important wolf due to the fact that it fulfills central functions in the processing of information, especially information that has an executive character, and also plays an important role in the construction of human personality. In addition, we can also say that the frontal lobe is divided into multiple regions that provide it with a wide variety of functions.
For this reason, we can say that damage to the frontal lobes can lead to brain damage that has devastating effects on human action and personality.
Which species' biological classification translates to the “goddess of hairy shellfish” and was first discovered in the Pacific Ocean in 2005?
You're watching television and an infomercial comes on for a new stain removal product called "Mr. Fantastic." This product claims to remove any stain from any material, no matter how old it is. You've just finished reading an extensive article about why some stains can't be removed. By comparing these two pieces of information, you're utilizing which of the following? A. Logic B. Observation C. Prediction D. Critical thinking
Answer:
D. Critical thinking
Explanation:
Granite is an example of _____ igneous rock that forms deep beneath Earth’s surface
What disease is transmitted from bats to humans and produces the signs/symptoms displayed by this patient?
A difference between miocene apes and modern apes is the
The level of which type of proteins in the blood rises during an inflammatory reaction?
Provide information regarding microbial size, shape, motility, and differentiation of the following preparations: spore stain, negative stain, simple stain, hanging drop slide, and Gram stain. Could the Gram stain be used to diagnose the flu? Why or why not?
No gram stain cannot be used because influenza virus causes flu and virus has no cell wall which we could stain.
Further explanation
Microbial size
A reasonable standard for estimating organisms is the micrometer which is multiple times littler than a meter (one-millionth of a meter). There are 106 µmeters in one meter, and it is these units that are utilized to quantify the size of microscopic organisms. Normally, microscopic organisms extend from around 1 µm to around 5 µm.
Microbial shape
There are a huge number of microbes, yet every one of them are essentially of three unique shapes. Some are rod like and called bacilli and E. coli is rod shaped. While some are round in shape like cocci e.g Staphylococcus. Third type is spiral like and is called spirilla.
Motility of microbes
The have the ability to swim or crawl frequently and interact with their physical and chemical environments.
Spore staining
It is a technique which is used for differentiation and we dye the cell wall and spores of bacteria.
Simple stain
It is one of very simple methods which involves only a single solution for staining.
Hanging drop slide
It is a technique which used wet mount and organism is dipped in it and then that organism is placed on a slide under microscope for analysis.
Gram stain
In this technique in which an organism is stained. It may be gram positive or gram negative.
Answer details
Subject: Biology
Level: college
Key words
Microbial size Microbial shape Motility of microbes Spore staining Simple stain Hanging drop slide Gram stainLearn more to evaluate
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Gram stain cannot be used to diagnose the flu.
Further Explanation:
Microbes are very small in size around 1µm-10µm. They are not easily visible by naked eyes. We can visualize microbes through the microscope.
Microbes divide majorly into categories:
• Bacteria
• Fungi
• Virus
• Protozoa
• Algae
Microbes are unicellular and some are acellular. Microbes synthesize their food through photosynthesis and some depend on the host cell.
Microbes have a different type of shapes:
• Spherical (cocci)
• Rod (bacilli)
• Spiral (spirilla)
• Comma (vibrios)
Motility is the capability of an organism to move. Flagella is present in mostly bacilli bacteria which help in the movement of bacteria.
Spore stain-
It is a differentiation technique in which we distinguish cell and spores. Malachite green dye is used which binds to walls of spores and cell. After washing, the comes out from the cell wall and pores remain green.
Negative stain-
In this technique background is stained and the specimen is unstained. This technique is used for determining cell size and arrangement of cells. Nigrosin dye is used in negative staining.
Simple stain-
In this technique, we use only one stain for bacterial staining, for example, methylene blue and safranin.
Hanging drop slide-
In this technique, slide has a concavity which contains an organism dipped into the fluid. This technique used to analyze the motility of an organism.
Gram stain-
In this technique, we differentiate two kinds of bacteria gram-positive and gram-negative on the basis of thickening of the cell wall.
Gram-positive bacteria contain thick peptidoglycan in their cell walls, due to which cells stained violet. Gram-negative bacteria are not capable to retain this solution due to thin cell walls that lack peptidoglycan layer.
Thus, the flu occurs due to the influenza virus. Viruses are enclosed by a protein coat they do not contain any cell wall because of this they cannot be tested using gram staining.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Microbiology
Keywords:
Microbial size, microbial shape, motility of microbes, spore staining, simple stain, hanging drop slide, gram stain, gram-negative bacteria, gram-positive bacteria, influenza virus, bacteria, protozoa, algae.
All of the populations of different species that occupy and are adapted to a given area are referred to by which term?
An experiment is designed so that you can observe the differences between the experimental group and the
Answer:
Control group
Explanation
In every experiment, we must need a standard or control to compere the other variations or treatments we assay. For example, we want to know the effect of a new fertilizer in plants. We have one group of plants without fertilizer and one group with fertilizer. after a month we see if the fertilizer is effective in promoting growth, we compare the size of the plants with and without if it is effective the plant will be taller than control group.
Answer:
Control group
Explanation:
A controlled experiment is one in which a control group is used to compare with an experimental group in a test of a causal hypothesis. The control group is the group that, on an experimental level, is subject to pretest and posttest, but not to treatment or intervention. Thus, the control group differs from the experimental group only in the absence of intervention or impact of the experimental (independent) variable, or its manipulation being equivalent from the point of view of sampling to the experimental group.
The hutterites have been able to maintain their identity and way of life largely as a result of being able to exercise some control over the processes of:
Answer:
Mostly because we keep to ourselves...
Explanation:
I would know, because i am one
How is blood routed through the small intestine? which class of nutrients enters the body via blood?
Blood is supplied to the small intestine by the superior mesenteric artery and nutrients such as glucose, amino acids, and fatty acids are absorbed into the bloodstream. The blood then returns to the heart and is pumped to the rest of the body. Nutrients like carbohydrates, proteins, and lipids enter the body via blood after absorption in the small intestine.
Explanation:Blood is routed through the small intestine via the superior mesenteric artery. This artery distributes blood to the jejunum, ileum, and parts of the duodenum and colon. The nutrients absorbed in the small intestine, such as glucose from carbohydrates, amino acids from proteins, and fatty acids from lipids, transport into the bloodstream. The blood carrying these nutrients then returns to the heart via the hepatic portal vein and superior mesenteric vein before being pumped to the rest of the body.
Among the various class of nutrients, carbohydrates, proteins, and lipids are absorbed through the small intestine into your bloodstream.
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