Every cell in the human body shares a common starting point: a fertilized egg. As a result, all of our cells theoretically contain the same DNA — ignoring specific cell types, such as erythrocytes and gametes, and the cumulative effects of DNA changes through mutation and telomere shortening. Despite this, each cell is unique, with one cell type completely dissimilar to another, not to mention being totally different to the original fertilized egg. Why?
The reason is that each cell — whether a neuron, skin cell, or a photoreceptor cell — uses the genes that it has differently. All cells have the same set of genes (~20,000 in humans) but it is up to the individual cell whether each gene is turned on or off.
Statistical methods are classified into which two major categories
The parts of an organisms environment that are living or once living and interact with the organism are _____
How are species introduced to new ecosystems? Check all that apply. carried in on cargo crates transported in or on ships result from mutations in other organisms hidden inside produce or meat carried on clothing or in luggage intentionally introduced by humans coevolution of two species
Answer: 1- Carried on cargo crates
2- Transported in or on ship
4- Hidden inside produce or meat
5- Carried on clothing or in luggage
6- Intentionally introduced by humans
Explanation:
A species introduce into the new ecosystem is the non-native species. This species will affect the life cycle of the native species both positively or negatively. Positively: The new species may be more productive and compatible for mating with the native species.
Negativity: The new species may interfere with the life cycle of native species. Such species may compete for resources with the native species.
The species may be transferred to the new ecosystem by carried on cargo crates, transported in or on ship, hidden inside produce or meat, carried on clothing or in luggage, and intentionally introduce by humans for their own benefit and use.
A nurse admits a neonate with a maternal history of drug abuse to the nursery. the neonate's vital signs are axillary temperature 97° f (36.1° c), heart rate of 168 beats/minute, respiratory rate of 38 breaths/minute. the neonate is quiet and drowsy. the nurse should:
The answer is the nurse should check the neonate's blood glucose level. It is also Instruct the family to keep the infant in the mother's room until culture results are available. Rewarm the neonate gradually or Place the infant under a warmer and notify the registered nurse.
Which of the following best explains why cells remove waste?
To create energy
To form identical cells
To break down glucose
To maintain homeostasis
I did the test the answer is D.To Maintain Homeostasis
The nurse is caring for a client with suspected bacterial meningitis. what is a priority action for the nurse to initiate?
Of the following give choices;
Provide analgesia.
Give the Hib vaccine.
Practice airborne precautions.
Provide IV antibiotics.
The answer is Provide IV antibiotics. Bacterial meningitis is a medical emergency since it could lead to death within hours or few days if not managed/treated. When IV antibiotics are given, in high doses (so they are able to pass the blood-brain barrier), the chances of deaths of the patient are reduced to 5% in all cases of bacterial meningitis.
How does the immune system work with other body systems to prevent and fight disease?
The immune system works in tandem with the rest of the body to prevent and fight any infections and diseases.
All the nucleated cells present in the body, that is all cells except the RBCs have on their surface major histocompatibility complex 1 (MHC 1). Whenever a cell is infected by a pathogen, the antigenic peptides that are synthesized in the cell are represented by MHC 1.
The peptides presented by MHC 1 are recognized by the T lymphocytes and an immune response is elicited.
The skin also acts as a physical barrier and prevents any infection.
The gastric acid secreted by the stomach also kills any pathogen that may have transmitted through food.
Learn more about immune system in:
https://brainly.com/question/13614862
#SPJ1
Why has our contemporary lifestyle, with many people spending hours sitting sedentary in front of televisions or computers, contributed to a significant rise in obesity?
a. because low muscle tone promotes insulin insensitivity
b. because blood glucose levels remain stagnant during inactivity
c. because humans use energy very efficiently, and less activity causes us to use less energy
d. because leptin is most effective when people are active?
The answer is C. Glucose, absorbed from food by our bodies, is saved as glycogen and fats when in excess and not being utilized. These reserves are stored to be used later during physical exercise. Living a sedentary lifestyle, therefore, causes the excessive accumulation of these storage reserves hence resulting in obesity.
What amino acid does the codon GAC code for ?
The amino acid codon GAC codes for Asx.
Final answer:
The codon GAC corresponds to the amino acid aspartic acid (Asp), and the mRNA sequence 5'-AUGCCACGAGUUGAC-3' translates to the amino acid sequence methionine-proline-arginine-valine-aspartic acid (Met-Pro-Arg-Val-Asp).
Explanation:
The codon GAC codes for the amino acid aspartic acid (Asp). When translating an mRNA sequence, it's important to read the sequence from the 5' end and consider that protein synthesis begins with the N-terminal amino acid. Given the mRNA sequence 5'-AUGCCACGAGUUGAC-3', this translates to the amino acid sequence methionine-proline-arginine-valine-aspartic acid (Met-Pro-Arg-Val-Asp).
It's worth noting that in the genetic code, each triplet of nucleotides, known as a codon, corresponds to a specific amino acid. While most amino acids are encoded by more than one codon, methionine and tryptophan are unique in that they are only encoded by one codon each. The codon AUG not only codes for methionine but also serves as the start signal for protein synthesis.
What will be the effect of a mutation that destroys the ability of poly(a)-binding protein (pabp) to attach to a poly(a) tail?
Mutation is defined as the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.
So if mutation destroys the ability of a poly(a) binding protein to attach a poly(a) tail, mRNA would degrade hence disrupt the regulation of mRNA regulation.
This is a description of a(n)
You coat a petri dish with fibronectin and proteoglycans and culture cells on the dish. the cells adhere to the dish. you repeat the experiment but this time add rgd tripeptides to the culture dish as the cells are added. what happens?
" The cells will show reduced adhesion to the culture dish when RGD tripeptides are added.
Fibronectin is a glycoprotein that is important for cell adhesion. It contains the RGD (Arg-Gly-Asp) sequence, which is a key recognition site for cell surface integrins. Integrins are transmembrane receptors that facilitate cell-extracellular matrix (ECM) adhesion. When cells are cultured on a petri dish coated with fibronectin and proteoglycans, they adhere to the dish through the interaction of their integrins with the RGD sequences present in fibronectin.
When soluble RGD tripeptides are added to the culture dish, they act as competitive inhibitors. These free RGD peptides can bind to the integrins on the cell surface, effectively blocking the RGD sites on the fibronectin-coated dish. As a result, the cells have fewer opportunities to bind to the fibronectin via their integrins, leading to reduced adhesion.
In summary, the addition of RGD tripeptides to the culture dish will competitively inhibit the binding of cell integrins to the fibronectin-coated surface, resulting in decreased cell adhesion compared to the initial experiment without the added RGD peptides."
In a plant species, if the b allele (blue flowers) and the b allele (white flowers) are incompletely dominant (bb is light blue), what offspring ratio is expected in a cross between a blue-flowered plant and a white-flowered plant?
a. 3/4 blue:1/4 white
b. all light blue
c. 1/2 blue:1/2 white
d. 1/4 blue:1/2 light blue:1/4 white
e. 1/3 blue:1/3 light blue:1/3 white
The ratio of the offspring that is expected in a cross between a blue-flowered plant and a white-flowered plant is all light blue. The correct option is b.
What are alleles?An allele is a term used for two or alternate forms of genes. The allele is a type of variation in a gene. Gene is a unit of heredity. The different types of alleles are normal and wild type allele and abnormal and mutant alleles.
If the b allele (blue flowers) and the b allele (white flowers) are not fully dominant in a certain plant species (bb is light blue). When a blue-flowered plant and a white-flowered plant are crossed, an all-light blue progeny ratio is what is anticipated.
Therefore, the correct option is b. all light blue regarding the ratio of offspring of produce when a cross occurs between a blue and white-flowered plant.
To learn more about alleles, refer to the link:
https://brainly.com/question/14206531
#SPJ2
Order the steps for vaccination. Pathogens enter the body and the body can remember the pathogen using memory cells, destroying the pathogen. A weakened or dead form of the pathogen is injected into the body. White blood cells produce antibodies that destroy the pathogen. The pathogen is not strong enough to cause disease but its presence in the body signals the body to protect itself against the pathogen.
Answer:
A vaccine is known to be the biological preparation that are known to provide acquired active immunity to a body against a particular disease. It consists of agents that is similar to disease causing microorganism, it is often made up of weakened, killed form of microbes or its toxin or its surface protein.
Vaccination is the treatment which makes body stronger against a particular disease. It helps body to fight against infection by making antibodies against pathogen.
The steps of vaccination are:
A weakened or dead form of the pathogen is injected into the body
↓
The pathogen is not strong enough to cause disease but its presence in the body signals the body to protect itself against the pathogen
↓
White blood cells produce antibodies that destroy the pathogen
↓
Pathogens enter the body and the body can remember the pathogen using memory cells, destroying the pathogen
Vaccination may be defined as a process through which a dead or inactivated form of a pathogen is injected into the body for the purpose of stimulating the immune system.
What do you mean by Pathogens?Pathogens may be defined as those microorganisms which are responsible for the causation of diseases.
The correct order of the steps for the vaccination is given below:
A weakened or dead form of the pathogen is injected into the body.The pathogen is not strong enough to cause disease but its presence in the body signals the body to protect itself against the pathogen.White blood cells produce antibodies that destroy the pathogen.Pathogens enter the body and the body can remember the pathogen using memory cells, destroying the pathogen. (Secondary infection).Therefore, it is well described above.
To learn more about Vaccination, refer to the link:
https://brainly.com/question/2559030
#SPJ3
James wants to create a self-sustaining ecosystem, or vivarium. Which method would most likely result in an ecosystem that is viable for the longest amount of time with no additional care? Put a few plants, water, sand, and a heat lamp inside a clear glass aquarium and seal the top. Place it in a sunny location. Put water, fertilizer, soil, plants and insects in an open, clear glass aquarium. Place it in an area that has some sunlight and some shade. Put rocks, water, and many plants in an open, dark-colored plastic tub. Place it in an area with direct sunlight. Put soil, water, many plants, and a few insects in a sealed, clear plastic aquarium. Place it in an area with indirect sunlight.
Answer:
Its D on edge 2021
Explanation:
Put soil, water, many plants, and a few insects in a sealed, clear plastic aquarium. Place it in an area with indirect sunlight.
An ecosystem must contain producers consumers decomposers and dead and inorganic matter.What is an ecosystem?An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life.Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts.Biotic factors include plants, animals, and other organismsHence, D option is correct.
To know more about ecosystem here
https://brainly.com/question/13979184
#SPJ2
In many places, large areas of land have been converted into heavily populated cities full of buildings and concrete. This process is called
Which of these is not supported by the endosymbiosis theory concerning organelles? A) contain DNA. B) contain ribosomes. C) are capable of living independently. D) are surrounded by a double membrane.
The endosymbiosis theory is supported by all BUT one piece of modern-day evidence. That is both organelles are capable of living independently. Although both organelles contain RNA, DNA, and ribosomes, if extracted from eukaryotic cells, they are not capable of living independently.
which environmental changes occur fastest.volcanic eruption. pond succession. decomposition of a tree. regrowth of forest after volcanic eruption
The waste products of cellular respiration include ______.water and glucosewater onlycarbon dioxide onlyglucose onlywater and carbon dioxide
Cellular respiration produces water and carbon dioxide as its waste products. These are used in photosynthesis for the creation of energy.
Explanation:The waste products of cellular respiration include water and carbon dioxide. During this process, oxygen is used to metabolize, or break down, carbohydrates within the cytoplasm and mitochondria of a cell. The result of this process is the release of energy in the form of ATP, along with byproducts of water and carbon dioxide. This is a part of a larger biological cycle where these byproducts are then used in photosynthesis to create life-sustaining energy.
Learn more about cellular respiration here:https://brainly.com/question/29760658
#SPJ6
When prescribing tacrolimus (protopic) to treat atopic dermatitis patients should be informed that:?
What are the types of light microscopes? What are their structures and functions?
a. Compound Light Microscope
b. Dissecting Microscope
Which is the highest point in the sky that the Sun reaches on a given day? A. ecliptic B. solstice C. tropic D. zenith
An individual has a nutrient deficiency due to a poor diet and is missing a specific amino acid, how would this affect the ability of the cell to synthesize particular proteins?
If an individual is missing a specific amino acid due to a poor diet, it would affect the ability of the cell to synthesize particular proteins, including those in neurons.
Explanation:The individual's neurons would not be able to synthesize proteins. Free amino acids available for protein construction are said to reside in the amino acid pool within cells. Structures within cells use these amino acids when assembling proteins. If a particular essential amino acid is not available in sufficient quantities in the amino acid pool, however, synthesis of proteins containing it can slow or even cease.
Why does a tundra lack trees? A. the animals eat it to quickly B. the permafrost has no soil C. the permafrost ground prevents deep root growth D. the ground is a glacier
The correct answer is C. The permafrost ground prevents deep root growth
Explanation:
Tundra is a biome characterized by cold temperatures, low vegetations (grasses, shrubs, mosses), and a subsoil covered by permafrost, which refers to a subsoil that has a temperature lower than 0° C and may contain ice. This permafrost is responsible for the presence of low vegetation and the lack of high vegetation such as trees, this can be explained as the low temperature along with possible ice prevents deep root growth and this stops trees and similar plants from obtaining nutrients and therefore thrive. According to this, the reason tundra lack trees is that the permafrost ground prevents deep root growth.
Research indicates that preschoolers spend approximately ________ reading on the average day. 15 minutes ? hour 1 hour ? hour
An organic chemist is studying a sample of a macromolecule. The compound has carbon, hydrogen, and oxygen in its structure. The physical properties of the compound show it behaving in a hydrophobic fashion. When placed in a calorimeter, it appears to have a high energy storage capacity. Which of the four types of biological macromolecules was the scientist most likely studying?
The organic chemist is most likely studying lipids. Lipids are hydrophobic and have a high energy storage capacity.
Explanation:The organic chemist is most likely studying lipids. Lipids are a type of biological macromolecule that contain carbon, hydrogen, and oxygen. They are hydrophobic, meaning they repel water, and they have a high energy storage capacity.
Learn more about lipids here:https://brainly.com/question/3498396
#SPJ12
The chemist is most likely studying b.lipids.
Lipids are known for their high energy storage capacity and hydrophobic nature, meaning they do not mix well with water. This is in contrast to carbohydrates, proteins, and nucleic acids which are generally more hydrophilic. Examples of lipids include fats, oils, and phospholipids, all of which contain carbon, hydrogen, and oxygen.
complete question
An organic chemist is studying a sample of a macolecule. The compound has a carbon, hydrogen and oxygen in its structure. When placed in a calorimeter, the molecule appears to have a high energy storage capacity. The chemist also notes that the compound does not mix water. Which of the four types of biological macromolecules is the scientist MOST likely studying? A. Carbohydrates B lipids C nuclear acids or D proteins?
why is the carbon cycle important to plants
Answer:it described how carbon is recycled between earth's biosphere, hydrosphere, geosphere and atmosphere. Carbon is an essential element for all life forms so understanding how it is recycled will help us to understand factors and all the biological processes that influence them.
Explanation:
Create a sentence explaining how amino acids form proteins.
Sample answer: Amino acids are monomers that combine to form polymers called proteins.
Answer:
Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.
Explanation:
which stage of stat development comes right after the long stable phase in the life cycle
which of the following is not considered an aspect of environmental health a) control of drinking water b) contral of hazardous chemicals c) control of sexually transmitted diseases d) control of public sanitation
The correct answer is option C
The control of sexually transmitted disease does not affects the environment in any manner. This can cause some disease in human disease but will not affect the environment.
The environmental health can be defined as the branch of biology that deals with the effect of human activities on environment.
So, controlling the sexually transmitted disease is not a matter of concern for the environmental health.