You are given an electron micrograph of a bacterial cell. In the micrograph you can clearly see three thin layers of different densities surrounding the cell. Based on the micrograph, you can infer that this cell is ________ and would appear ________ after application of the gram stain procedure.
Answers
The micrograph suggests that the bacterial cell has three thin layers of different densities surrounding it. Based on the micrograph, it can be inferred that the cell has a cell wall, plasma membrane, and capsule.
Gram staining, a laboratory technique used to identify the type of bacteria, is based on the differences in the cell walls of bacteria. Gram-positive bacteria have a thick peptidoglycan cell wall, while gram-negative bacteria have a thin peptidoglycan cell wall surrounded by an outer membrane.In this case, since the micrograph shows that the bacterial cell has three distinct layers, it can be inferred that the cell has both a cell wall and plasma membrane, as well as a capsule.
Based on these characteristics, it can be concluded that the bacterial cell is gram-negative. When applying the gram stain procedure to this cell, it would appear pink or red due to the thin peptidoglycan layer in the cell wall, which cannot retain the crystal violet-iodine complex and is decolorized by alcohol or acetone. Therefore, the micrograph suggests that the bacterial cell is gram-negative and would appear pink or red after application of the gram stain procedure.
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Related Questions
Q6. A neurotransmitter would have a greater chance of starting an action potential in a post-synaptic neuron by:
opening K+ channels in the post-synaptic membrane
causing a graded depolarization in the post-synaptic membrane
causing a graded hyperpolarization in the post-synaptic membrane
closing Na+ channels in the post-synaptic membrane
Answers
Answer:
a
Explanation:
Neurons secrete chemical molecules that act as messenger and takes part in signalling at the arrival of any chemical or electrical impulse are called a neurotransmitter.
The action potential can be started by:
Option a. Opening K⁺ channels in the postsynaptic membrane.
The action can be explained as:
The presynaptic neurons are the active neurons that transmit the impulse from the synapse with the help of neurotransmitters.The resting neurons or the postsynaptic neurons upon receiving the impulse open the channel gates.The postsynaptic receptors interact with the neurotransmitter that leads to the opening or closing of the ionic channels on the membrane.This leads to depolarization of the membrane causing action potential to occur.Thus potassium channels open.
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What can some gram positive bacteria do in response to harsh and nutrient limited environments? A. Form an endospore
B. Form cell walls C. Self-destruct D. Grow flagella
Answers
The correct option is A ; . Form an endospore , Gram-positive organisms with dynamic cell envelopes, such as the pathogens Staphylococcus aureus,.
Streptococcus pneumoniae, and Enterococcus faecalis, mediate interactions with the environment and serve as the first line of defense against hazardous chemicals.
Some bacteria create an endospore, a form of spore that can endure extremes such as boiling and freezing temperatures, as well as UV light. These bacterial endospores are frequently subjected to years of suffering before they discover the growth conditions required for germination.
Gram-positive bacteria have lately been found as key components of freshwater ecosystems, as well as being prevalent in marine habitats. However, their quantitative significance and potential function in these latter systems, particularly in coastal locations, has received little attention.
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_______ are lipoproteins made of dietary fat surrounded by a shell of cholesterol, phospholipids, and protein; their role is to transport fat that has beenabsorbed from the GI tract. Group of answer choices
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Chylomicrons are lipoproteins made of dietary fat surrounded by a shell of cholesterol, phospholipids, and protein; their role is to transport fat that has been absorbed from the GI tract.
Chylomicrons are the lipoproteins responsible for transporting dietary fat. Chylomicrons are formed in the small intestine after absorption of dietary fat and are transported via the lymphatic system to the bloodstream where they can deliver the fat to cells throughout the body. Chylomicrons are responsible for transporting fats that have been absorbed from the gastrointestinal (GI) tract to various tissues in the body, such as adipose tissue, muscle, and liver, where they are either stored or used for energy production.
To sum up, chylomicrons are the lipoproteins that play a crucial role in transporting dietary fats absorbed from the GI tract throughout the body.
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aerial roots are present in:-
a) all aquatic plants
b) all Terrestrial plants
c) mangrove plants
d) none of the above
Answers
Answer:
c) mangrove plants l thinkThe ability to use old cells is an advantage of _____.hybridization DNA testingrestriction fragment length polymorphism (RFLP) polymerase chain reaction (PCR) all DNA testing procedures
Answers
The ability to use old cells is an advantage of all DNA testing procedures.
Sometimes the flow of ocean currents is compared to the movement of a conveyor belt. Does your experiment support this statement?
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Since you haven't provided details about the experiment you're referring to, I am unable to determine whether it supports the statement comparing ocean currents to a conveyor belt.
Without information about the experiment in question, I cannot provide a specific main answer. However, if the experiment involves studying the movement and patterns of ocean currents, it may provide evidence to support the comparison of ocean currents to a conveyor belt. Ocean currents, like a conveyor belt, transport water and heat around the globe in a continuous, flowing manner. By studying the direction, speed, and behavior of ocean currents, scientists can better understand their role in the Earth's climate system and how they influence marine ecosystems and weather patterns.
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Precipitation that falls on Earth's surface ________. A) is usually already unusable because of acid rain B) mostly runs off into salt marshes or the ocean C) almost entirely filters down into the underground aquifers D) may take a variety of pathways through surface water or groundwater flow E) is mostly taken up by plants or other organisms
Answers
Precipitation that falls on Earth's surface D) may take a variety of pathways through surface water or groundwater flow.
When precipitation, such as rain or snow, falls on Earth's surface, it can follow different pathways. While some factors like acid rain can affect the usability of precipitation, the options provided in the question do not accurately reflect the overall fate of precipitation.
Option A states that precipitation is usually already unusable due to acid rain, but this is not the case for all precipitation events. Acid rain is a form of precipitation that has an increased level of acidity due to pollution, but it does not represent all precipitation.
Option B suggests that most precipitation runs off into salt marshes or the ocean. While runoff can occur and contribute to the water cycle, it is not the sole or primary fate of all precipitation.
Option C implies that precipitation almost entirely filters down into underground aquifers. While some precipitation does infiltrate the ground and recharge aquifers, it does not capture the entire range of pathways precipitation can take.
Option E states that precipitation is mostly taken up by plants or other organisms. While vegetation and organisms play a role in the water cycle and can uptake precipitation through processes like evapotranspiration, it does not account for the complete fate of precipitation.
Option D accurately reflects that precipitation can follow various pathways, including surface water flow (runoff) and groundwater flow. Precipitation can flow over the land surface, collecting in rivers, lakes, and other bodies of water. It can also infiltrate the soil, percolating down into groundwater aquifers. This variety of pathways ensures the continuous movement and distribution of water on Earth's surface.
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how do vaccines stop the spread of a virus
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Population numbers for species were also recorded and graphed for each treatment (control and experimental). Based on the background and data provided, hypothesize whether Mytilus
would have an increasing or decreasing population trend over time. Provide a rationale for your response.
Answers
Mytilus would have a decreasing population trend over time.
What is a control and experimental treatment?In an experiment, the control group either receives no treatment, a standard treatment whose effect is known, or a placebo.
The experimental group also known as the treatment group, receives the treatment whose effect the researcher is interested in.
In the experiment on the effect of the presence of Pisaster on the population of Mytilus, the data obtained is given in the picture.
Based on the data obtained, it can be hypothesized that the population numbers for Mytilus would have a decreasing population trend over time.
In conclusion, the population of species change with changes in factors affecting population such as predators.
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You are doing research on a bacterial species, trying to determine the nature and structure of a number of intracellular inclusions. Which type of microscopy would provide the best view of these intracellular structures
Answers
Answer:
Transmission Electron Microscope.
A Transmission Electron Microscope provides the best view of the intracellular structures.
What is Transmission Electron Microscope?
Transmission electron microscopes (TEM) are microscopes that use a particle beam of electrons to visualize specimens and generate a highly-magnified image. TEMs can magnify items up to 2 million instances. with a purpose to get a better concept of simply how small that is, think about how small a cellular is.
What is a transmission electron microscope used for?The transmission electron microscope is used to view skinny specimens (tissue sections, molecules, etc) through which electrons can bypass producing a projection picture. The TEM has similarities in lots of ways to the traditional (compound) light microscope.
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Please Help me. I need the answer asap
Answers
Answer:
first one
Explanation:
meiosis-- is the division of sex cells
mitosis-- is the division of body cells
ond to Reading Name LABORATE Share your notes from Graphic Organizer 4 with a partner. Use the sentences below to have a collaborative conversation about the text Present your ideas to the class. 1. Discuss the author's point of view about Mother Jones. woman and a good Mother Jones was a
Answers
Answer: A
Explanation:trust
What does the energy from sunlight actually do to the plant cell? *
It heats up the plant cell
It excites electrons
It is unknown
It transforms to kinetic energy
Answers
Answer:
It excites electrons
Explanation:
Energy from sunlight excites electrons in plant cells and drives the chemical reaction needed to produce food in plants.
This reaction is called photosynthesis. During photosynthesis, green plants manufacture their food using sunlight in the presence of carbon dioxide and water. The product of the reaction is glucose and oxygen gas. The role of the sunlight is to excite electrons which facilitates the process.Welcome to Candyland!
Tell me how this ecosystem works! For every question, you’ll tell me what role each snack/candy plays in this ecosystem. YOU MUST ALSO SAY WHY. Convince me that your Candyland is more correct than the rest of the class! (There might be some bonus points for the best, most logical land!) So, in your Candyland:
1) Which snacks are the Apex predators, and why?
2) Which snacks are the consumers, and why?
3) Which snacks are the producers/plants, and why
4) When it rains, what falls from the sky, and why?
5) When it hails, what falls from the sky, and why?
6) When it snows, what falls from the sky, and why?
7) Pick a candy/snack. Explain to me their life cycle. You can look at frog life cycles, butterfly, fish, mammals, and even plants. Pick a model and tell me how your treat grows up? ( Must be at least 3 steps. More is cooler.) Does it start as a seed? Does it go through metamorphosis? Tell me all about it!
8) Based on everything so far, is this a utopia (Good place) for humans or a Dystopia (bad place) for humans? And why?
Answers
In ecosystem, Killer whales are apex predators, which means they have no natural predators.
What do you mean by apex predators?An apex predator, also known as a top predator, is a predator at the top of a food chain, without natural predators of its own. Apex predators are usually defined in terms of trophic dynamics, meaning that they occupy the highest trophic levels.
In the natural sciences, an apex predator is a predator that exists at the very top of the food chain. Unlike some other predators, it's never preyed upon itself. Examples include polar bears, lions, crocodiles, and orcas.
There are some “apex” predators that are found throughout much of the world, including grey wolves, blue whales, killer whales and great white sharks. In my mind, however, humans are clearly the overall apex predator of the world. We've even been called the super-predator.
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how does comparing the anatomies of living species with those from the fossil record help biologists to understand life on earth better?
Answers
It helps determine the habitat most suitable for various species. It helps predict the time when various species will become extinct. Any preserved indication of a once-living thing from a previous geological age is known as a fossil.
Examples include exoskeletons, bones, shells, animal or microbe imprints in stone, items preserved in amber, hair, petrified wood, and DNA traces. The fossil record is the collection of all fossils. The study of fossils, including their age, mode of formation, and evolutionary importance, is known as paleontology. If a specimen is older than 10,000 years, it is typically regarded as a fossil. The oldest fossils date back between 3.48 and 4.1 billion years. A geological timeline was made possible by the discovery in the 19th century that different fossils were connected to particular rock layers.
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You have a plant that you want to show off at a party. The party happens during autumn (aka fall). Usually in autumn (aka fall) the leaves of your plant fall off. You want to delay the leaves falling off your plant until after the party. What plant hormone would you use to help keep the leaves on? ethylene O cytokinins O gibberellins auxin
Answers
Answer:
Auxins
Explanation:
Auxin is a plant hormone that has to do with both leaf and fruit fall.
The ____ is the structure through which a mother and an embryo exchange waste and nutrients. Select one: a. stem cell b. amnion c. germ disc d. placenta
Answers
The Placenta is the structure through which a mother and an embryo exchange waste and nutrients.A placenta is a temporary organ that serves as the primary communication link between the developing embryo and the mother's body.
It has a large surface area that allows the exchange of gases, nutrients, and waste products between the mother's and the fetus' circulatory systems. Because of the existence of the placenta, the fetus's circulatory system does not have to be exposed to the mother's blood. The mother's and the fetus's blood do not mix directly. The placenta provides the growing fetus with all of its nutrient and oxygen requirements. The fetus sends carbon dioxide and other waste products back to the placenta, which removes them from the mother's body. The placenta is also responsible for the production of hormones that are necessary for the development of the baby's brain and other organs. It produces estrogen, progesterone, and human chorionic gonadotropin, among other hormones. The hormones are released into the mother's body and are transported to the developing fetus through the placenta.
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Give one substance that plants absorb by active transport
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2. According to Ernst Haeckel, the bacteria were included in (kingdom kart
| kingdom algae | kingdom Protista | kingdom protozoa)
to which
Answers
According to Ernst Haeckel, the bacteria were included in the C. kingdom Protista.
Ernst Haeckel was a prominent German biologist who proposed a classification system for living organisms in the 19th century. In his system, he divided living organisms into three kingdoms: kingdom Plantae, kingdom Animalia, and kingdom Protista.
The kingdom Protista was defined by Haeckel as a group of unicellular organisms that did not fit into the categories of plants or animals. This kingdom included a wide range of microscopic organisms, including bacteria, algae, and protozoa.
Haeckel's inclusion of bacteria in the kingdom Protista was based on their unicellular nature and their distinct characteristics separate from both plants and animals. At that time, bacteria were not fully understood in terms of their diversity and complexity. Later advancements in microbiology and molecular biology led to a better understanding of bacteria as a distinct domain of life, separate from eukaryotes.
Therefore, while Haeckel's classification was significant in its time, the classification of bacteria has since been revised, and they are now classified as a separate domain called Bacteria. Therefore, Option C is correct.
The question was incomplete. find the full content below:
According to Ernst Haeckel, the bacteria were included in
A. kingdom kart
B. kingdom algae
C. kingdom Protista
D. kingdom protozoa
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Some simple columnar and pseudostratified columnar epithelia have ________ cells, which produce a protective mucous coating over the mucous membranes.
Answers
Goblet cells are those secretory cells or unicellular glands, which make and expel mucus can be found in simple columnar and pseudostratified columnar epithelia.
What are goblet cells?They are goblet-shaped cells that have a basal nucleus and a cytoplasm loaded with mucins (the main component of mucus).
Characteristics of goblet cellsIt is present in the epithelia of the respiratory and digestive systems. Its main function is to secrete mucus, which protects and lubricates the inner surface of simple columnar and pseudostratified columnar epithelia.Therefore, we can conclude that goblet cells are mucus-secreting cells present in epithelial linings.
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Multiple choice question
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A
B
D
Need help with this. PLS
Answers
Answer: propahse. the longest phase of mitosis is prophase because in this phase many structure disappear like nucleus membrane and nucleolus at late prophase nd in early phrophase stage centriole become start dividing and shall go to the pole and mid phrophase stage centriole takes position at 90° between each other and lastly at the.
Explanation:
If flying squirrels were brought to australia, what do you predict would happen?.
Answers
Answer:
they would die
Explanation:
they would propadly die because they need big, not too warm forests and that is not in Australia
)) 1) Members of a city planning committee want to designate over 100 hectares of greenspace in the city limits as protected, natu other committee members to implement a plan that maximizes biodiversity in the greenspace while reducing the likelihood of in biologist committee member's ideas? Select ALL that apply
Answers
The proposal supporting the idea to maximize biodiversity in the greenspace while reducing the invasion by a nonnative species in the city is: (C) Native species should be maintained or planted within the greenspace to promote biodiversity.
Biodiversity is the presence of various types of living organisms in a geographical area. The biodiversity of a region is said to be rich if it contains a huge variety of plants, animals and microorganisms.
Native species are the species that have been living in a geographical region for a very long period of time. They are necessary for the ecosystem of any region because they can prevent the non-native species from invading the area and therefore protect the biodiversity.
Therefore the correct answer is option C.
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The given question is incomplete, the complete question is:
Members of a city planning committee want to designate over 100 hectares of greenspace in the city limits as protected, natural areas. One committee member, a biologist, tries to convince the other committee members to implement a plan that maximizes biodiversity in the greenspace while reducing the likelihood of invasion by a nonnative species. Which proposals would support the biologist committee member's ideas? Select ALL that apply.
A) A large, continuous section of greenspace equaling 100 hectares should be conserved.
B) One hundred small, one-hectare size areas should be conserved across the city's limits.
C) Native species should be maintained or planted within the greenspace to promote biodiversity.
D) Exotic species should be cultivated and planted to increase biodiversity in the protected greenspace.
E) The majority of the secondary consumers should be removed from the greenspaces to promote an increase in lower levels of the food chain.
My dog sandy measured the width of a machine part he made in his lab and told caryl the width was 16.25mm. caryl knew sandy had learned to properly report the correct significant digits. She asked sandy what the uncertainty of his measurements was and sandy correctly said
a). ±0.01mm b). 1.5% c). 4% d) cant tell e). ±0.25mm
Answers
The information which is provided is insufficient to determine the uncertainty in the measurements done by Sandy.
The correct option is option d.
Based on the information which is provided, it is not possible to accurately determine the uncertainty of Sandy's measurement without additional context or knowledge about the measuring instrument's precision or the method used.
Uncertainty in measurements basically depends on factors such as instrument precision, measurement technique, and environmental conditions. To determine the uncertainty, one needs to consider factors beyond the reported value itself. Without specific information about these factors, it is not feasible to determine the uncertainty with certainty.
Hence, the correct option is option d.
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Which plant tissue, made up of vessels, transports water and nutrients from the roots to other parts of the plant?
Answers
the plant tissue that transport water and nutriens are phloem and xylem
Write the 10 examples of non flowering plants.
Answers
Answer:
1 MONEY plant
2 Mosses.
3 Lichens.
4 Ferns.
5 Horsetails.
6 Conifers.
7 Cycads.
8 Ginkgo.
9 liverworts.
10 cub mosses.
of what significance is the blood pressure of 136/80 mm hg to the use of nitroglycerin?
Answers
The use of nitroglycerin is not indicated when the blood pressure is 136/80 mm Hg or higher. Nitroglycerin is a drug that is used to treat chest pain or angina.
It dilates blood vessels, allowing for more oxygen and blood flow to the heart, reducing chest pain or angina.
The significance of blood pressure of 136/80 mmHg is that it is considered to be a high-normal blood pressure reading. The normal range for blood pressure is less than 120/80 mmHg.
It is recommended that people with high-normal blood pressure take lifestyle measures to reduce their blood pressure. Blood pressure values that are high can be a concern since nitroglycerin is not indicated when blood pressure is 136/80 mm Hg or higher.
The use of nitroglycerin can lead to significant decreases in blood pressure, making it unsafe for individuals with high-normal or elevated blood pressure.
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Lipids commonly contain fatty acids. What are the two parts of a fatty acid? Check the correct answers below.
Answers
Answer:
I think they are glycerol and carboxyl
Which of the following term does NOT involve multiple loci. a. Complex traits b. Independent assortment c. Haplotype Recombinant d. Random segregation Trisomy 21. Robertsonian translocation and PKU syndrome are three human phenotypes due to DNA changes in different scales. Which of the following shows the order of DNA alterations, in large to small scales, that cause these phenotypes? a. Robertsonian translocation > trisomy 21 PKU syndrome
b. None of other answers is correct.
c. trisomy 21 > Robertsonian translocation > PKU syndrome d. PKU syndrome > trisomy 21 > Robertsonian translocation
e. PKU syndrome > Robertsonian translocation trisomy 21
Answers
1. c. Haplotype Recombinant.
2. c. trisomy 21 > Robertsonian translocation > PKU syndrome.
1. The term that does not involve multiple loci is c. Haplotype Recombinant. Haplotype refers to a set of genetic variations on a single chromosome, while recombinant refers to the reshuffling of genetic material during meiosis. It does not inherently involve multiple loci, but rather the arrangement of alleles at a single locus.
2. The correct order of DNA alterations, in large to small scales, that cause the phenotypes mentioned is c. trisomy 21 > Robertsonian translocation > PKU syndrome. Trisomy 21 refers to the presence of an extra copy of chromosome 21, resulting in Down syndrome, which is a large-scale alteration involving a whole chromosome. Robertsonian translocation involves the fusion of two acrocentric chromosomes, often resulting in rearrangements and genetic disorders. Phenylketonuria (PKU) syndrome, on the other hand, is caused by alterations in a single gene, resulting in the inability to metabolize phenylalanine. Therefore, the order from large-scale to small-scale DNA alterations is trisomy 21, Robertsonian translocation, and PKU syndrome.
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