Explanation:
advantages:Physical barriers play an important role in preventing microbes from reaching tissues that are susceptible to infection. At the cellular level, barriers consist of cells that are tightly joined to prevent invaders from crossing through to deeper tissue.
Physical barriers play an important role in preventing microbes from reaching tissues that are susceptible to infection. At the cellular level, barriers consist of cells that are tightly joined to prevent invaders from crossing through to deeper tissue.
What is immune system?Immune system is a large network of organs, white blood cells, proteins (antibodies) and chemicals. This system works together to protect you from foreign invaders (bacteria, viruses, parasites, and fungi) that cause infection, illness and disease.
Disadvantages of physical barriers in the immune system is causing immuno deficiency disease.
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True or false: If we extracted DNA from thyroid and neural tissues, we would find the CALCA gene in both types of cells.
Answer:
True
Explanation:
The calcitonin/calcitonin gene-related peptide (CALCA) gene is used to encode different peptide sequences (i.e., calcitonin hormone, calcitonin-related peptides and katacalcin) through alternative RNA splicing. These peptides have different functions. Calcitonin is a hormone mainly produced by cells of the thyroid gland, which is involved in the control of levels of calcium and phosphate in the blood. Moreover, katacalcin is a peptide synthesized from the same precursor of calcitonin (and therefore also mainly produced by cells of the thyroid gland), which is implicated in both calcium regulation and skeletal maintenance. Finally, the calcitonin gene-related peptide (CGRP) is a peptide mainly produced by sensory nerves (type Aδ fibers ), which is involved in pain pathways. The CALCA gene has attracted considerable attention from geneticists because it is specifically expressed in neuroendocrine tissues in normal conditions and abnormally induced in septic conditions (i.e., during the body's extreme response to an infection).
Energy is transferred from the Sun to Earth many by
Energy is transferred from the Sun to Earth mainly by [tex]\sf\purple{electromagnetic\:waves\:or\:radiation}[/tex].
D. electromagnetic waves. ✔
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Assume similar data for the motion of the blood in a carotid artery which connects the aorta to the brain. Estimate how many beats of the heart it will it take the blood to get from your aorta to your brain. (Assume that the distance from your aorta to your brain is 30 cm.)
Answer:
4 beats
Explanation:
The number of beats of the heart that will take blood from Aorta to The Brain
n = Distance from Aorta to brain / distance per beat
Given that distance per beat = 7.5 cm ( calculated value outside scope of question using the data attached below)
n = 30 cm / 7.5 cm
= 4 beats
The Vocabulary of Nutrition for Children, Adolescents, and Older Adults
In order to understand nutrition-related problems that occur within different age groups, you must first be able to use the vocabulary. Review the sentences below and select the term that best completes the sentence.
Match the words in the left column to the appropriate blanks in the sentences on the right.
picky eating
peak bone mass
life expectancy
obesity
arthritis
bone mineral density (BMD)
food jag
congregate meal
food insecurity
epiphyseal plates
1. ---------------------- usually involves avoidance of new foods, while a---------------------------------- represents a preference for a certain limited number of foods at the exclusion of others.
2. Adolescent bone growth occurs along the -------------------------------------- .
3. In healthy individuals,--------------------------- increases through early adulthood.
4. Rates of ------------------------------------- have doubled in children in the past 30 years.
5. Many older adults experience ------------------------------------- due to factors like limited income, poor health, or impaired mobility.
6. For individuals born around 1900, the ------------------------------ was around 47 years.
7. Severe ---------------------------------------- can impact mobility, making it difficult to obtain and prepare meals.
8. A ------------------------------------------------- can provide nutritious food and socialization for older adults.
Answer:
1. Picky eating; food jag
2. epiphyseal plates
3. bone mineral density (BMD)
4. obesity
5. food insecurity
6. life expectancy
7. arthritis
8. congregate meal
Explanation:
Picky eating is a behavior in early childhood when they refuse to eat certain foods and only want the same foods, while food jag is when a child only eats a small group of foods, meal after meal. The epiphyseal plate is a specialized layer of hyaline cartilage where chondrocytes (i.e., the only cells found in healthy cartilage) proliferate and differentiate during longitudinal bone growth. Arthritis is an inflammation of the joints caused by different reasons (e.g., injury, genetic causes, infections, immune system dysfunction, etc), whose risk increases with age. Bone mineral density (also known as bone density), is the amount of mineral in bone tissues, being the best manner to measure bone health. Obesity can be defined as an excessive amount of body fat that presents a risk to health. Over the past 30 years, the prevalence of obesity has doubled in children and tripled in adolescents, representing a serious health problem (especially in developed countries). Moreover, food insecurity is a social condition of limited access to food for individuals in a household to live an active, healthy life, which can be used as a metric of how many people cannot afford food. Life expectancy is an estimation of the number of years a person can expect to live in a given country/region. Life expectancy around the world has increased for nearly 200 years especially due to medical progress and access to food. Finally, a congregate meal refers to a healthy meal provided to anyone age 60 or over that encourages older adults' social connections with other persons at the meal sites.
True or False
humans can survive longer without food than they can without water
All of the following are examples of erosion EXCEPT
O The wind in the desert blows sand against a rock.
O A glacier picks up boulders as it moves.
O A flood washes over a riverbank, and the water carries small soil particles downstream
O An icy winter causes the pavement in a road to crack
Which statement best describes the population at point B?
A. The death rate is high.
B. There is abundant food and space.
C. There is too much competition for resources D. The carrying capacity has been reached
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Please answer!! 20 POINTS AND BRAINLIEST
Answer:
1.crust
2.Divergent boundaries
3.tectonic plates
4.seismograph
5.S-waves
6.P-waves
Explanation:
Mitosis produces
A. two genetically different daughter cells
B. two genetically identical daughter cells
C.four genetically identical haploid cells
D.four genetically different haploid cells
Answer:
B. two genetically identical daughter cells
Viruses and bacteria can infect human cells. Bacteria are living organisms, while viruses are not. How do you think the treatment for viral and bacterial illnesses differ? How do you think they affect healthy body cells? Explain your response.
Bacteria cause bacterial infections. Viruses cause viral infections. Antibiotic medicines kill or keep many bacteria from growing but don't treat viruses.
What is a virus?
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea.
The virus works by damaging the wall and the lining of the alveolus and capillaries. The debris from the damage, which is plasma protein accumulates on the alveolus wall and thickens the lining. As the walls' thicken, the transfer of oxygen to the red blood cells is impaired.
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* Identify the organelle that makes energy for the cell
O Nucibus
O Mitochondria
O Golgi Apparatus
O Cell Membrane
Answer:
O Mitochondria
Explanation:
Answer:
b
Explanation:
The mitochondrion (plural mitochondria) is a membrane-bound organelle found in the cytoplasm of eukaryotic cells. It is the power house of the cell
name the type of coordinated response that takes place as a result of a specific stimulus, such as the withdrawal of the hand from a hot object touching the skin
Answer:
The correct answer is - reflex response.
Explanation:
If an individual touch something hot accidentally and immediate removal of the hand takes place, this occurs involuntarily. This type of coordination reaction called reflex action. Reflex action is an involuntary response that takes place due to a specific stimulus.
These stimuli result in an unplanned sequence of action or movement. Removing hand in response of contact to a hot object, change of the pupil of the eyes in response of light, coughing in response of some irritants in nassal passage and others. The reflex arch is the pathway they follow to carry out reflex action.
Gastrointestinal issues in a somatization disorder often lead to __________.
A.
symptoms in women that affect their menstrual cycle
B.
the inability to swallow or loss of voice
C.
other disorders if not treated appropriately
D.
unnecessary medical procedures and surgeries
Answer:
D. unnecessary medical procedures and surgeries
Explanation:
Got it right on edge2020, Somatoform Disorders {Pratice}
Somatization disorder is a condition where the patient presents physical ailments as gastrointestinal issues that can lead to unnecessary medical procedures and surgeries.
What is a somatization disorder?It is a chronic condition in which the person has physical ailments without an apparent medical cause.
Due to the difficulties in finding the origin of the problem, it can lead to unnecessary medical procedures and surgeries, in addition to the fact that diagnosis and treatment care usually falls on the somatic nervous system.
Therefore, we can conclude that somatization disorder is a condition where the patient presents physical ailments as gastrointestinal issues that can lead to unnecessary medical procedures and surgeries.
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In DNA replication, gaps between newly synthesized segments of DNA and existing segments of DNA are sealed by enzymes called ______, which form covalent bonds between the two segments.
Answer:
In DNA replication, gaps between newly synthesized segments of DNA and existing segments of DNA are sealed by enzymes called ligases, which form covalent bonds between the two segments.
Explanation:
During DNA replication, there is a continuous strand of DNA and fragments of DNA called Okazaki fragments. The DNA ligase will join the Okazaki fragments using ATP's energy and creating a covalent bond between the phosphate of a nucleotide in an Okazaki fragment and the sugar of a nucleotide in another Okazaki fragment. As a result, there are two continuous DNA fragments.
Question 1: Biodiversity and Ecosystem Health (20 points) a) Describe two ways of measuring biodiversity. Explain the relationship between biodiversity and ecosystem stability. As part of your explanation, discuss how susceptibility to disease in agricultural crops and in isolated tribal human populations provides evidence that supports this idea. (5 points)
Answer:
explanation below
Explanation:
A) Biodiversity is simply known as the number and variety of organisms found in a definite environment or region. Scientists have devised several ways of measuring biodiversity and the methods to be used depend on the type of organisms they are to count.
Canopy fogging – one of the ways of measuring biodiversity, has remained an effective way of obtaining details about the biodiversity of insects. It involves the act of spraying low dose of insecticides on a tree top, and when the insects fall from the trees, they are being collected on a large screen, that looks like a funnel.
Transact sampling is another way of measuring biodiversity and this time, with a transact line. The transact line is usually a measuring tape or rope that has been marked at set intervals.
b) Ecosystem stability is the ability of the ecosystem to maintain its steady state, even after it has experienced stress or disturbances. The biodiversity of an environment makes huge impact on the ecosystem stability in that particular area. It has been known that certain areas that have high levels of species and genetic diversity, are more likely going to an ecosystem that is complex, with varying food webs and biotic interactions. The increase in this complexity makes it more likely that the ecosystem of that area will rightly move back to a stable state whenever disturbances are experienced.
There are evaluated scientific evidence that shows that reduced biodiversity affects the transmission of communicable disease in agricultural crops, animals and humans. Loss of biodiversity usually increases susceptibility to diseases in plants and humans.
A behavior with both innate and learned components that is irreversible and is triggered during a sensitive period.
Fixed action pattern
Imprinting
Operant conditioning
Migration
Answer:
The correct answer is - Imprinting.
Explanation:
Imprinting is a behavior that includes both innate components and learning components and normally can not be irreversible. It is something that takes place at a specific sensitive period.
For instance, ducklings follow their mother is imprinting that is both innate and learned at a limited phase after birth during development. It can be visual or auditory or other ways that an animal can develop imprinting.
Trace how the brain responds to stimuli through the nerves and neurons.
Answer:
The correct answer is -The brain and the spinal cord respond and sends a signal down a motor neuron to a specific sensory stimulus.
Explanation:
Sensory receptors sense the changes that take place in the environment that is called stimuli by sensory neurons that transmit the signal from the sensory receptors to the brain.
The brain and the spinal cord make the central nervous system. This coordinates a response to a specific stimulus and sends a signal down a motor neuron and send a signal to the effector by motor neurons.
In a population of mice, there are two alleles of the A locus (A1 and A2). Tests showed that, in this population, there are 384 mice of genotype A1/A1, 210 of A1/A2, and 260 of A2/A2. What are the frequencies of the two alleles in the population
Answer:
f(A1) = 0.575f(A2) = 0.425Explanation:
Due to technical problems, you will find the complete explanation in the attached files
What is unusual about the cell walls of acid-fast-positive bacteria that makes them difficult to stain without heat
What are the applications of CRISPR/Cas9-mediated Epigenetic Editing?
The CRISPR/Cas9 with the advantages of low cost and ease of use gives researchers the opportunity to manipulate the epigenome and observe its possible effects on cell function, development, and differentiation (Figure 1). Using non-active dCas9 (another type of Cas9 lacking nuclease activity but retaining DNA binding activity) fused enzymes such as DNA methylase, histone acetyltransferase, and deacetylase can be targeted to alter the epigenetic state of precise locations within the genome.
https://www.creative-biogene.com/crispr-cas9/solution/crispr-cas9-mediated-epigenetic-editing.html
Answer:
Applications:
- silence gene expression of target genes
- activate gene expression of target genes
- determine the role of DNA methylation and histone modifications (methylation, acetylation, etc) on specific regulatory sites (e.g., enhancer sequences)
Explanation:
The CRISPR/Cas9 system can be repurposed to edit the epigenome of living cells. For this purpose, it is required 1-to fuse a catalytically inactive 'dead' Cas9 enzyme with enzymes involved in epigenetic mechanisms (e.g., DNA methyltransferases, histone deacetylases, etc) capable of activating or deactivating gene expression, and 2-to design single-guide RNAs (sgRNAs) complementary to the sequence of interest (i.e., target sequences whose epigenome landscape we are trying to modify). For example, dCas9 gene has been fused with the DNA methyltransferase 3a (Dnmt3a) gene to create a dCas9-DNMT3A complex which can be combined with a specific sgRNA in order to study the effects of DNA methylation at a particular gene. These CRISPR/Cas9-mediated epigenome editing systems have shown to be very useful to understand how epigenome drives chromatin folding and dynamics at specific genomic sites (loci), and thus regulate gene expression at the transcriptional level.
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Which type of reproduction provides organisms with the following advantages? Desirable traits can be selectively bred for in a population of organisms. More genetic diversity that might benefit individuals when environment changes.
A. Asexual reproduction
B. Sexual reproduction
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Answer:
nnnoooo
Explanation:
1. Much of the behavior of all primates is learned. Nonetheless, we have suggested many times that primate behavior has been shaped by natural selection. How can natural selection shape behaviors that are learned
Answer:
Nature selects best suited organisms having behaviours that help in the survival of organisms in that environment.
Explanation:
Natural selection can shaped the behaviors that are learned by the organisms because these behaviours helped organisms in their survival. Those organisms will be selected by the nature which can withstand the changing environmental conditions. Organisms adopt different behaviours in order to survive harsh environmental condition and these behaviour shaped by the natural selection in that organism so that they survive and grow in that environment.
1.What do other organisms rely on plants for?
Answer: Organisms depend on other organisms and on the nonliving things in an ecosystem to meet their basic needs for food, water and protection. 3. Plants use energy from the sun to produce their own food from air and water.
Explanation:
Fill in the following 1Green plant are called ___________since the synthesise their own food.
rose leaves licth leave
Which rock layer is probably the oldest?
A.
3
B.
5
C.
2
D.
4
Answer:
3
Explanation:
Answer: 4
Explanation: THE OTHER ANWSER IS WRONG
6. Which statement describes evolution?
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This is due tomorrow!
Answer:
C
Explanation:
Answer:
C
Explanation:
Throwing stuff away increases pollution
Using paper one time means you need to throw it away
Riding everywhere in a car eventually leads to gas being burnt (with few exceptions)
A mountain lion population recently experienced a drop in population size. Which of the following would best describe the limiting factor that is involved?
A) A change occurred in the genetic variability.
b) The deer population experienced a rapid decline due to a parasite.
C) Mountain lion hunting experienced an increase in restrictions.
D) The population of Trichinella, a parasite, experienced a decline.