Flatworms use a system of canals and tubes with the ______ as their excretory organ.
The cell membrane regulates the internal environment of the cell by which method
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.
A difference between miocene apes and modern apes is the
Nina is exploring her gender identity and sexual orientation.
Which best describes how the role of the media might influence Nina during this time in her life?
The media would help her decide because television shows are always unbiased about gender issues and do not stereotype.
The media could make things difficult for her because television sometimes portrays rigid ideas about gender roles.
All forms of media will help her decide because the media always portrays rigid ideas about gender roles.
All forms of media will make things easy for her because the media always portrays open and fair ideas about gender roles.
The correct answer is B. The media could make things difficult for her because television sometimes portrays rigid ideas about gender roles.
Explanation:
Gender identity and sexual orientation are important aspects of sexuality in human beings. Gender identity refers to the gender individuals identify with, while sexual orientation refers to the attraction of individuals for other people including attraction to the opposite gender, the same gender, both, etc. These aspects are commonly defined during adolescence and it is common individuals look for models to define or identify themselves including models in television.
The main issue with this is that media tends to portray rigid ideas about gender roles because there is little or no inclusion of individuals with alternative gender identities such as transgender people or individuals with alternative sexual orientations such as bisexual people. Due to this, the media could make things difficult for Nina in terms of exploring her gender identity and sexual orientation because the media sometimes portrays rigid ideas about these aspects.
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.
What disease is transmitted from bats to humans and produces the signs/symptoms displayed by this patient?
The wall of the alveolus (air sac) in the lung is composed of which type of epithelium?
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
One potential cause of valve dysfunction is rupture of the chordae tendineae why would this lead to valve dysfunction
All of the populations of different species that occupy and are adapted to a given area are referred to by which term?
A fatty acid that lacks at least one hydrogen along its chain is considered to be
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.
While __________ bacteria retain carbol fuchsin after acid-alcohol treatment, __________ bacteria are decolorized by acid-alcohol?
Final answer:
Acid-fast bacteria retain carbol fuchsin after acid-alcohol treatment because of the protective waxy mycolic acid in their cell walls; non acid-fast bacteria are decolorized and counterstained blue with methylene blue.
Explanation:
While acid-fast bacteria retain carbol fuchsin after acid-alcohol treatment, non acid-fast bacteria are decolorized by acid-alcohol. Acid-fast bacteria, which include mycobacteria, a pathogen of humans and animals, possess the waxy substance mycolic acid in their cell walls. Mycolic acid acts as a protective barrier making these cells impervious to certain staining techniques like the Gram stain, and as a result, these cells require a special staining method known as acid-fast staining.
To identify these bacteria, the Ziehl-Neelsen or Kinyoun staining methods are used, which involve heating the bacterial sample with carbol fuchsin, then treating with acid-alcohol. The acid-fast cells retain the bright pink or red coloration due to their waxy cell walls resisting decolorization, whereas non acid-fast cells lose the pink to red color and are counterstained with methylene blue, appearing blue.
A thickened horizontal stem that grows underground and produces flowering plants such as canna and bearded iris is called a
Answer:
The answer is A rhizome is a stem of a plant that is growing underground and is growing horizontally. It is also known as rootstocks
Explanation:
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.
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
Dr. martinez's patient has __________. the doctor wants to use an evidence-based treatment to reduce the symptoms; therefore, she will treat the patient with __________.
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
Which species' biological classification translates to the “goddess of hairy shellfish” and was first discovered in the Pacific Ocean in 2005?
Granite is an example of _____ igneous rock that forms deep beneath Earth’s surface
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.
Research by the national highway traffic safety administration has shown that drivers who get more citations are in more crashes
The research explores the relationship between traffic citations and crash involvement, using both real-world and fictional data to illustrate how driver behavior and safety measures are analyzed for public transportation policy development. Data analysis includes examining racial profiling, driver error in accidents, and safety feature improvements in vehicles over time. These analyses are critical to forming effective road safety policies and regulations.
Explanation:The research mentioned posits a correlation between frequent traffic citations and a higher rate of involvement in crashes among drivers. To explore this relationship, let's consider fictional and real-world data. In a fictional study, fifteen drivers accumulated thirty-three traffic citations over seventeen days, which led to the early termination of the experiment due to depleted funds for paying fines and decline in participant enthusiasm. Sociologist Frances Heussenstamm examined the correlation between traffic stops and race-based bumper stickers to understand the issue of racial profiling. Furthermore, data from the American Automobile Association suggests that driver error is a primary cause behind a significant proportion of fatal auto accidents, a finding that can be tested statistically. These scenarios underscore the relevance of driver behavior and law enforcement on road safety.
Statistically analyzing road safety data, such as the number of top safety picks among cars, can lead to more informed decisions regarding vehicle design and traffic regulations. The Insurance Institute for Highway Safety annually publishes safety information which can be used to evaluate whether safety in cars has improved over the years. Recognizing driver error as a major contributor to accidents, such analyses are critical in shaping policies and practices aimed at reducing traffic-related injuries and fatalities. Actual U.S. Census Bureau data on fatal motor vehicle traffic crashes can be referenced to better understand trends and implement safety measures.
When conducting such research, the primary statistic used is the proportion of incidents or characteristics within a certain population. For example, the proportion of driver dummies that would have suffered head injuries if they were real people in a controlled car crash test is a critical statistic for evaluating vehicle safety. Safety measures like traffic signal installations are often justified by statistics indicating unacceptable accident rates in an area. Therefore, compiling and scrutinizing such data is fundamental for public safety and transportation policy development.
Good conductors must
a. resist neutron flow.
b. readily accept electron flow.
c. readily accept neutron flow.
d. resist electron flow.
Answer: b. readily accept electron flow.
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A patient is scheduled for a fiberoptic colonoscopy. what does the nurse know that fiberoptic colonoscopy is most frequently used to diagnose? cancer screening inflammatory bowel disease bowel disease of unknown origin occult bleeding
_______ is the science of observing and describing organisms in their environment paired with experimental science.
The most common cause of chronic pelvic pain for women in the prime of their reproductive years is:
Acetate has a/an ________ shaped cross section
Acetate has a planar shaped cross section due to its resonance hybrid structure, where the negative charge is equally distributed between the two oxygen atoms, each with a bond order of 1 1/2.
Acetate, a common anion found in many biological and chemical systems, has a planar shaped cross section. This is inferred from its 3D structure based on X-ray crystallographic studies and resonance stabilization. The acetate anion, with the formula CH3COO-, has two carbon-oxygen (C-O) bonds that are identical in length at 126 pm, which indicates a resonance hybrid structure.
This bond length is between the length of a C=O double bond and a C-O single bond, implying that both bonds have a bond order of 1 1/2. In this structure, the negative charge is delocalized and equally distributed between the two oxygen atoms, each carrying a charge of -1/2.
The cross-section, or the shape visible when looking at one end of a part of a structure, of a molecule like acetate, which has equivalent bonds, is consistently planar. This planarity results from the resonance forms, where the charge is not localized but spread over the molecule, enhancing its stability and influencing its shape. Acetate's molecular configuration contrasts with nonresonant structures, where the negative charge might be more localized, leading to different molecular shapes.
Chemical properties and molecular structures are closely linked, as demonstrated by different molecules like acetic acid and methyl formate, which, despite having the same molecular formula, display unique structures and chemical behaviors.
The level of which type of proteins in the blood rises during an inflammatory reaction?
The physical gap between two nerve cells across which messages are transmitted is the